EXPANSION MECHANISM FOR A MEDAL STORAGE BOX

Abstract

The present invention provides an expansion mechanism for a medal storage box. The expansion mechanism can link directly to change between a storage posture and a display posture of the medal by providing a single action force. By an external action force, the expansion mechanism links to push up the medal in a display posture; whereas, by exerting another action force in an opposite direction, the position of medal can change and be collected in a flat posture. The expansion mechanism is an inner stretching mechanism, a pulling mechanism, or a pushing mechanism.

Description

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention relates to an expansion mechanism for a medal storage box, and more particularly to an expansion mechanism that by providing a single action force, the expansion mechanism can link directly to change between a storage posture and a display posture of the medal.

(b) Description of the Prior Art

For a person who contributes sincerely to achieve a commendable fact, a rewarding institute will usually present a prize to him or her for incentive. It is common to present a medal, and the medal is normally a piece of physical label in a circular shape.

To show respect and to preserve and collect the medal for long term commemoration, the medal is often made of metal, metalloid, or delicate handmade ceramics, in a shape of a circular badge.

In presentation and when a presenter issues the medal to an awardee, the medal will be displayed to the guests. The display method is that the presenter uses any finger of one hand to take the medal, while fix and position the medal above the storage box supported by the other hand. The image of the medal is enlarged by the shape of the storage box to facilitate drawing the sight of attendees. After awarding, the awardee uses fingers to hold and store the medal flat in the storage box.

On the other hand, prior to awarding, the prizes will often be displayed in a venue. The display posture is shown in FIG. 1, wherein an external auxiliary bracket 16 is used to support a medal 20 by a concave structure above the auxiliary bracket 16. After a medal 20 crosses over the auxiliary bracket 16, the entire body is put above a storage box 10 for display, and is arranged in an array of the prizes. After awarding, an awardee must carry the auxiliary bracket 16 additionally, or find a space in the storage box 10 to collect them together. A medal 20 is restored in an embedding slot 15 above a lower box unit 12 and is collected after being covered by a cover body 11. Conventionally, it is inconvenient in fetching and storing the medal 20, the storage space for the auxiliary bracket 16 is limited, and the storage box 10 simply plays a supporting role.

SUMMARY OF THE INVENTION

Accordingly, a primary object of the present invention is to provide an expansion mechanism for a medal storage box, wherein the expansion mechanism can link directly to change between a storage posture and a display posture of the medal by providing a single action force. By an external action force, the expansion mechanism links to push up the medal in a display posture. On the other hand, by exerting another action force in an opposite direction, the position of medal can be changed in the opposite direction to be collected in a flat posture. The expansion mechanism is an inner stretching mechanism, a pulling mechanism, or a pushing mechanism.

A second object of the present invention is to provide an expansion mechanism for a medal storage box, wherein the expansion mechanism is an inner stretching mechanism.

A third object of the present invention is to provide an expansion mechanism for a medal storage box, wherein the expansion mechanism is a pulling mechanism.

A fourth object of the present invention is to provide an expansion mechanism for a medal storage box, wherein the expansion mechanism is a pushing mechanism.

A fifth object of the present invention is to provide an expansion mechanism for a medal storage box, wherein in the inner stretching mechanism or the pulling mechanism, a flexible element is driven by a cover body provided by the storage box to provide an opening force in opening the cover body. The opening force is transferred into a pull force to pull and deform the rectangular mechanism, which facilitates the operation of linking the medal to manifest the display posture or the storage posture.

A sixth object of the present invention is to provide an expansion mechanism for a medal storage box, wherein a swing arm is fixed on a cover body to result in a sweeping action by exerting a force to open or close the cover body, linking a pushing link rod and a back pushing rod to push the expansion mechanism simultaneously, which in turn links the change in angle of the medal, so that when the cover body is opened, the medal is linked to stand up simultaneously; whereas, when the cover body is closed in the opposite direction, the medal is linked to be stored at a same time. This provides the convenience in operating the change in posture of the medal simultaneously when opening and closing the cover body.

A seventh object of the present invention is to provide an expansion mechanism for a medal storage box, wherein an upper side in front of a floating lever is linked with a note plate, and the note plate will emerge upward following the horizontal emergence of floating lever, so that letters on the surface of the note plate can be read intuitively.

To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic view of storing and displaying a medal conventionally.

FIG. 2 shows a side view of an inner stretching mechanism of the present invention.

FIG. 2-1 shows a partial three-dimensional view of the inner stretching mechanism, according to the present invention.

FIG. 3 shows a schematic view of a medal display posture, according to the present invention.

FIG. 4 shows a schematic view of the inner stretching mechanism, before and after the change in position, according to the present invention.

FIG. 5 shows a schematic view of a medal storage posture of the inner stretching mechanism, according to the present invention.

FIG. 6 shows a schematic view of a flexible element which is provided by the inner stretching mechanism of the present invention.

FIG. 7 show a schematic view of a pulling mechanism of the present invention.

FIG. 8 shows a schematic view of a flexible elements which is provided by the pulling mechanism of the present invention.

FIG. 9 shows a schematic view of unfolding the flexible element that is provided by the pulling mechanism of the present invention.

FIG. 10 shows a schematic view of the pulling mechanism, before and after the change in position, according to the present invention.

FIG. 11 shows a schematic view of the medal storage posture of the pulling mechanism, according to the present invention.

FIG. 12 shows a schematic view of a pushing mechanism of the present invention.

FIG. 13 shows a schematic view of the pushing mechanism, before and after the change in position, according to the present invention.

FIG. 14 shows a schematic view of the medal storage posture of the pushing mechanism, according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

By exerting a single action force, an expansion mechanism for a medal storage box can link directly to change between a storage posture and a display posture of the medal. The expansion mechanism links to push up the medal in a display posture by an external action force; on the other hand, the position of medal changes in an opposite direction to manifest a flat posture for storage at a same time, by exerting another action force in the opposite direction. The expansion mechanism can be an inner stretching mechanism, a pulling mechanism, or a pushing mechanism. In addition, an upper side in front of a floating lever can be connected to a note plate which will emerge upward following a horizontal emergence of the floating lever, so that letters on the surface of the note plate can be read intuitively.

In the inner stretching mechanism and the pulling mechanism, a flexible element is driven by a cover body of the storage box to provide an opening force in opening the cover body. The opening force is transferred into a pull force to link a medal 20, manifesting a display posture or a storage posture.

For the expansion mechanism, a swing arm which is fixed on the cover body can result in a sweeping action by exerting a force to open or close the cover body, linking a pushing link rod and a back pushing rod to push the expansion mechanism simultaneously, so as to link the angular change of the medal.

The present invention discloses primarily an expansion mechanism which is assembled in an operating space inside the storage box. By a single external action force, the expansion mechanism based upon a four-bar mechanism will result in a change in planar space, so as to link the medal to lift up in a display posture. On the other hand, by exerting an action force in an opposite direction, the expansion mechanism can link the medal to change position for storage, with the medal being embedded and positioned on a front side of a support structure to be assembled indirectly with the storage box.

The description of the structures and the operation states of the present invention is provided below, in referring to the drawings.

For the definition of space, the opening side of a cover body 11 is the front side (as shown in FIG. 3), a side having a connection pivot 17 is the rear side, the cover body 11 is disposed on an upper side, a lower side is a lower box unit 12, the inner end is defined as the state that all rod units are disposed inside the expansion mechanism, and the outer end is defined as an outward direction.

Referring to FIG. 2, along with FIG. 2-1, a storage box 10 is provided with the cover body 11, the rear side is connected downward to the lower box unit 12 through the connection pivot 17, an interior of the lower box unit 12 is an operating space 18, and a side of the operating space 18 is assembled with an expansion mechanism 100 of which a working plane is parallel to the direction in which the cover body 11 is opened and closed. The expansion mechanism 100 is an inner stretching mechanism 40, and is provided with a bottom fixing rod 41 which is fixed and assembled on a side of the operating space 18. Two ends of the bottom fixing rod 41 are connected to a left swing rod 42 and a right swing rod 43 through a left pivot P1 and a right pivot P2, respectively. The other end of the left swing rod 42 and the right swing rod 43 is connected to each end of a floating lever 44 through a left connection point P3 and a right connection point P4, forming a four-bar rectangular (or square) mechanism, which provides a geometric change in the rectangular plane by the support of left pivot P1 and right pivot P2.

A pulling rod 45 is provided. An end of the pulling rod 45 with a length smaller than that of the floating lever 44 is coaxially connected to the left connection point P3, and the other end is connected to the inner end of an extension strut 23 through a variable connection point P5. The outer end of the extension strut 23 is connected to a support structure 22 which provides for embedding the medal 20, and a longitudinal chute 230 is parallel attached to or assembled commonly with the extension strut 23 longitudinally. An inner annular side of the longitudinal chute 230 provides for the emplacement of a radial circumference of a radial slide bar 400 which is fixed at a place of the floating lever 44. When unfolding the expansion mechanism, the radial slide bar 400 is abutted tangentially on the outer end of longitudinal chute 230.

Above the floating lever 44 and in adjacent to the right connection point P4, a note plate 30 is assembled through a stool 31. The note plate 30 emerges following the emergence of the floating lever 44.

When the inner stretching mechanism 40 is opened to link the support structure 22 to lift up in a display posture, an elastic sliding snap 14, and end of which is fixed relatively on the lower box unit 12 or on a side of the bottom fixing rod 41, is utilized to maintain the inner stretching mechanism 40 at the unfolding posture and prevent the support structure 22 from lying back by other external force, after the elastic sliding snap 14 snaps tangentially using its elastic snapping function.

The elastic sliding snap 14 functions the elastic snapping. In one implementation, the elastic sliding snap 14 corresponds to the location of left swing rod 42, providing for snapping the left swing rod 42 when the left swing rod 42 is opened at a maximum angle (as shown in FIG. 2-1), so as to fix the medal 20 at the elevated posture. On the other hand, when the position of inner stretching mechanism 40 changes in an opposite direction, the left swing rod 42 will escape from the elastic sliding snap 14 elastically. The structure of elastic sliding snap 14 is like a normal elastic tongue strip, and one end is fixed on the lower box unit 12 or fixed on a side of the bottom fixing rod 41, whereas the other end is an elastic tongue end. When the left swing rod 42 is opened, a section of the left swing rod 42 relative to the elastic sliding snap 14 enters tangentially from the tongue end. Next, the left swing rod 42 is snapped and positioned elastically by elastic connection. In an opposite direction, as the force at which the left swing rod 42 changes its angular position is larger than the elastic connection force, the left swing rod 42 will escape from the elastic sliding snap 14.

By the support of left pivot P1 and right pivot P2, the floating lever 44 of the inner stretching mechanism 40 can maintain horizontal swinging through the linking of left swing rod 42 and right swing rod 43. A place in the body of floating lever 44 is fixed with a radial slide bar 400 which is coaxial to each pivot, such as the left connection point P3. The radial slide bar 400 is slidingly disposed in the longitudinal chute 230 which is disposed longitudinally at a place on the body of extension strut 23. In the process, by the rigidity of pulling rod 45 and the connection support of left connection point P3, the variable connection point P5 will be driven to swing toward the left pivot P1. In the same time, as the radial slide bar 400 levels up, the length of longitudinal chute 230 provides for the extension strut 23 to slide toward an upper end of the longitudinal chute 230 longitudinally. After the expansion mechanism is opened, by a relative angle between the variable connection point P5 and the radial slide bar 400, the extension strut 23 will lift up.

When the present invention is used, the external force can be acted onto the note plate 30 directly; for example, a finger is used to touch an upper surface of the note plate 30, exerting the force toward the rear side of the connection pivot 17. Then the expansion mechanism will be supported rigidly by the left swing rod 42 and the right swing rod 43, and the support structure 22 will be affected by the variable connection point P5, lifting up the medal 20 in the display posture. On the contrary, if an external force is acted in an opposite direction onto the note plate 30 toward the front side of the connection pivot 17, the medal 20 will lie down to be stored.

Under a condition that the operating space is limited, an upper edge on a front board in front of the lower box unit 12 can be concaved with a finger hole 13, providing for a user's finger to open and operate the note plate 30 or the right connection point P4 directionally.

Referring to FIG. 3, the structures in FIG. 2 support a display face 21 of the medal 20 to lift up for watching, the upper surface of the note plate 30 can be printed with label texts, and the inner stretching mechanism 40 is disposed inside the operating space 18. The upper surface of the lower box unit 12 excludes an upward connected planar area of the operating space 18; whereas the periphery of the operating space 18 can be provided with a flat surface 19, which provides for a surface decoration after the medal 20 lifts up. The cover body 11 and the lower box unit 12 are connected through the connection point 17 on the rear side.

Referring to FIG. 4 and FIG. 5, by exerting an action force F in the opposite direction, such as that a finger exerts the force onto the note plate 30 forward and downward, the medal 20 will lie down toward the lower box unit 12. Initially, the left swing rod 42 escapes from the elastic sliding snap 14, and the position of right swing rod 43 changes in a rectangular shape, same as the floating lever 44. In the process, the radial slide bar 400 is slidingly disposed in the longitudinal chute 230, and is repelled by the variable connection point P5 of the pulling rod 45. Finally, the radial slide bar 400 will slide to the inner end of the longitudinal chute 230. For the posture of collection (as shown in FIG. 5), the medal 20 can nearly lie flat or lie flat completely. However, if the covering height of the cover body 11 is sufficient, the medal 20 does not need to lie flat horizontally. This can remove considerably the static friction among the structures when the expansion mechanism 100 is opened, allowing the operation to be more smoothly while the medal 20 lifts up again.

Referring to FIG. 6, when the action force F provides for opening the cover body 11 by the linking of structural elements, the medal 20 will be linked to lift up simultaneously. In addition, by the angle of force to pull up the cover body 11, the static friction of the expansion mechanism 100 can be avoided. For example, between the left connection point P3 and the cover body 11, a flexible element 500 is provided to link the cover body 11. By the support of connection pivot 17, in opening the cover body 11, the flexible element 500 will result in a pull force, pulling the left connection point P3 to change its position as in FIG. 2 to FIG. 4, through the support of left pivot P1.

An end of the flexible element 500 is combined at the left connection point P3, and the other end is combined at a contact point 110 inside the cover body 11. After the space of inner stretching mechanism 40 changes by linking the pull force from the flexible element 500, the medal 20 will lift up, and the note plate 30 will emerge upward to manifest a full display to show the appearance (as shown in FIG. 7). On the contrary, when the cover body 11 is closed in the opposite direction, the medal 20 will restore to the state in FIG. 5; wherein, the flexible element 500 is randomly disposed inside the storage box 10 after being stored flexibly. As the flexible element 500 is only pulled and released, the line section itself will not be tied up. To simplify the drawing, the storage result of flexible element 500 in FIG. 5 is omitted.

FIG. 8 shows the present invention in another implementation of pushing rod 46. The expansion mechanism 100 is a pulling mechanism 50, with the length of pushing rod 46 being smaller than that of the floating lever 44. An end of the pushing rod 46 is connected to the right connection point P4, and the other end is connected to the inner end of extension strut 23 by a variable connection point P5. The extension strut 23 is parallel combined with a longitudinal chute 230, and a radial slide bar 400 is coaxially combined at the left connection point P3. An outer circumference of the radial slide bar 400 is slidingly disposed in the longitudinal chute 230 in the radial direction. This drawing manifests the posture that the storage box 10 is opened to display the medal 20, wherein the opening operation can be made similarly by exerting an external force onto the note plate 30 or the right connection point P4 to repel it backward. After the positions of radial slide bar 400 and the longitudinal chute 230 change against the left pivot P1 by the linking of left connection point P3, the medal 20 will lift up in a three-dimensional posture as in FIG. 3.

Referring to FIG. 9, the lifting operation can be also made by connecting with an external element. For example, a flexible element 500 is used similarly, with one end thereof being combined at the left connection point P3, and the other end thereof being combined at the contact point 110 inside the cover body 11. By the pivoting function of connection pivot 17, the cover body 11 will flip relative to the lower box unit 12. In opening the cover body 11, a force is exerted onto the flexible element 500 to result in a pull force, pulling the left connection point P3 to change its position backward and upward, so as to lift up the medal 20 in a display posture.

The angular fixing force to lift up the medal 20 in the display posture can be made by a common elastic connection mechanism of a box, wherein the box is opened and positioned at an opening angle, and is closed and positioned at a closing angle. This function can be implemented at the connection pivot 17 to support the temporary fixing of the cover body 11 at an opening and closing angle (as the elastic positioning belongs to a common reed, no further description is provided). When the cover body 11 is opened, the cover body 11 will maintain the opening state by the elastic positioning, resulting in a force to exert onto the flexible element 500, so as to keep fixing the medal 20 at an elevated angle.

Referring to FIG. 10 and FIG. 11, by the opening force of the cover body 11, the flexible element 500 maintains the medal 20 at the display posture. On the other hand, when the cover body 11 is closed, the tension of flexible element 500 will be released, and the pulling mechanism 50 will restore automatically to the pattern in FIG. 11 by the gravity of medal 20, or the pulling mechanism 50 will return to the storage posture by using help from a finger to press down the note plate 30.

Referring to FIG. 11, by the gravity or the auxiliary force exerted by a finger, the medal 20 can manifest a lying-down posture, and the angle of lying-down posture can be flat or a little inclined as in FIG. 5. After the change in position, the flexible element 500 is distributed freely and flexibly.

Referring to FIG. 12, it shows another implementation of the present invention, wherein by opening and closing the cover body 11 and the lower box unit 12 of the storage box 10, the resulted force of change during the process will make a link to push or store the medal 20. The present invention is also deployed with an expansion mechanism 100 which is a pushing mechanism 60. The pushing mechanism 60 is similarly provided with a bottom fixing rod 41, and the level of bottom fixing rod 41 is above a waist of the lower box unit 12. The provided pushing mechanism 60 is provided with a pushing rod 46, with the length thereof being smaller than that of the floating lever 44. An end of the pushing rod 46 is connected to the right connection point P4, and the other end is connected to the inner end of extension strut 23 which is extended from the support structure 22 through the variable connection point P5. The left swing rod 42 crosses over the left pivot P1 downward through an assembly portion 62, and is then fixed and connected to an extension arm 61 which is extended downward. A lower end of the extension arm 61 is provided with a pushing pivot P6, and the swing path of pushing pivot P6 is lower than the bottom fixing rod 41.

A swing arm 65 is provided. An end of the swing arm 65 is fixed in the cover body 11 on a side in adjacent to the connection pivot 17, and acts as a swing pivot by the support of connection pivot 17. The other end of the swing arm 65 is extended toward the operating space 18, and a tail end that the swing arm 65 is extended into the operating space 18 is provided with a back pushing pivot P7. A repelling pivot P8 is disposed on the swing arm 65, at a place away from the back pushing pivot P7 toward the connection pivot 17. A pushing link rod 63 is provided. A tail end of the pushing link rod 63 is connected to the pushing pivot P6 provided by the extension arm 61, and the other end is connected to the repelling pivot P8. In addition, a back pushing rod 64 is provided. An end of the back pushing rod 64 is connected to the back pushing pivot P7, and the other end is connected to a connection point P9 provided by the support structure 22.

Referring to FIG. 13, while opening the cover body 11, the swing arm 65 will be linked to swing on a fourth-quadrant plane against the connection pivot 17. By the connection of the back pushing pivot P7 and the repelling pivot P8, the swing action pushes the pushing link rod 63 and the back pushing rod 64 simultaneously, wherein the pushing pivot P6 of the pushing link rod 63 will also result in a pushing force to push the extension arm 61 and form a moment of force to link the left swing rod 42 to swing through the assembly portion 62, thereby causing a planar change to the rectangular pushing mechanism 60. Through the back pushing rod 64, the back pushing pivot P7 repels the connection point P9 against the variable connection point P5, and the back pushing force enables the medal 20 to lift up passively, manifesting the display posture with the three-dimensional appearance similar to that in FIG. 3.

After the pushing mechanism 60 pushes the medal 20 to manifest the display posture, the cover body 11 is closed in the opposite direction. Then, against the connection pivot 17, a lower section of the swing arm 65 inside the operating space 18 will swing, and the back pushing rod 64 and the pushing link rod 63 linked to the back pushing pivot P7 and the repelling pivot P8 will pull back simultaneously. The pull-back action causes the pushing link rod 63 to pull the pushing pivot P6, enabling the left swing rod 42 to swing in the opposite direction. In addition, the back pushing rod 64 pulls the connection point P9. Accordingly, the medal 20 lies back in the opposite direction to be stored, like the final storage result shown in FIG. 14.

Referring to FIG. 14, after the cover body 11 covers the lower box unit 12, the swing arm 65 swings in the opposite direction to be attached on an inner surface on the rear side of the lower box unit 12, against the connection pivot 17. At this moment, the repelling pivot P8 and the back pushing pivot P7 link respectively the pushing link rod 63 and the back pushing rod 64 in the opposite direction, so as to pull the rectangular pushing mechanism 60 in the opposite direction, thereby reducing the height of bottom fixing rod 41 and floating lever 44. Then, the medal 20 lies back toward the rear side by the linking of connection point P9. The angle at which the medal 20 lies back can be the same inclination posture as shown in FIG. 5, which avoids the static friction among the structures to affect the smoothness in opening the expansion mechanism 100 again.

The present invention discloses the expansion mechanism which lifts up the medal in the display posture or pushes flat the medal in the storage posture by an external force. By the opening and closing of the cover body, the external force can display and store the medal simultaneously. In implementation, a user can use a finger to push, the flexible element can be used as assistance, or the pushing link rod and the back pushing rod can push and pull reversely by the swing arm, to lift up the medal for display or push back the medal for storage, facilitating the display of medal in a venue of rewarding and the ease of storage after rewarding. The awardee can easily expand the medal for watching at home for commemoration, or can close the medal storage box reversely for the convenience in storage. In the expansion mechanism, as the medal is latched to the storage box indirectly, the medal and the storage box will form a single unit after assembly, which is indeed an innovative design of the medal storage and expansion mechanism.

It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. An expansion mechanism for a medal storage box, being linked directly to change between a storage posture and a display posture of the medal by exerting a single action force, comprising a storage box, which is provided with a lower box unit, with an interior of the lower box unit being an operating space, an upper surface of the operating space being a flat surface, and a rear side of the lower box unit being connected to a cover body through a connection pivot; an expansion mechanism, which is assembled in the operating space, with a working plane of the expansion mechanism being parallel to a direction in which a cover body is opened and closed, the expansion mechanism being provided with an extension strut, an outer end of the extension strut being connected outward to a support structure, and the expansion mechanism being an inner stretching mechanism which further includesa bottom fixing rod which is fixed on a side of the operating space, with two ends of the bottom fixing rod being connected to a left swing rod and a right swing rod through a left pivot and a right pivot respectively, a free end of the left swing rod and the right swing rod being connected to two ends of a floating lever through a left connection point and a right connection point respectively, forming a parallel mechanism;a pulling rod, an end of which is coaxially connected to the left connection point, with the other end of the pulling rod being connected to an inner end of the extension strut through a variable connection point;a longitudinal chute, which is parallel to and assembled with the extension strut;a radial slide bar, which is fixed on a place of the floating lever and is slidingly disposed in the longitudinal chute in a radial direction; andan elastic sliding snap, which is fixed on a place of the operating space, corresponding to a place after any element in the inner stretching mechanism is unfolded.

2. The expansion mechanism for a medal storage box, according to claim 1, wherein a total length of pulling rod is smaller than that of the floating lever, and the radial slide bar is stopped at an outer end of the longitudinal chute when the expansion mechanism is unfolded.

3. The expansion mechanism for a medal storage box, according to claim 1, wherein a section of the floating lever, at an end of the right connection point, is upward assembled with a note plate.

4. The expansion mechanism for a medal storage box, according to claim 1, wherein a flexible element is provided, with an end of the flexible element being assembled at the left connection point, and the other end of the flexible element being assembled at a contact point provided by the cover body.

5. An expansion mechanism for a medal storage box, being linked directly to change between a storage posture and a display posture of the medal by exerting a single action force, comprising a storage box, which is provided with a lower box unit, with an interior of the lower box unit being an operating space, an upper surface of the operating space being a flat surface, and a rear side of the lower box unit being connected to a cover body through a connection pivot; an expansion mechanism, which is assembled in the operating space, with a working plane of the expansion mechanism being parallel to a direction in which a cover body is opened and closed, the expansion mechanism being provided with an extension strut,an outer end of the extension strut being connected outward with a support structure, and the expansion mechanism being a pulling mechanism which further includesa bottom fixing rod which is fixed on a side of the operating space, with two ends of the bottom fixing rod being connected to a left swing rod and a right swing rod through a left pivot and a right pivot respectively, a free end of the left swing rod and the right swing rod being connected to two ends of a floating lever through a left connection point and a right connection point respectively, forming a parallel mechanism;a pushing rod, an end of which is coaxially connected at the right connection point, with the other end of the pushing rod being connected to an inner end of the extension strut through a variable connection point;a longitudinal chute, which is parallel to and assembled with the extension strut; anda radial slide bar, which is coaxially assembled at the left connection point and is slidingly disposed in the longitudinal chute in a radial direction.

6. The expansion mechanism for a medal storage box, according to claim 5, wherein a total length of pushing rod is smaller than that of the floating lever, and the radial sliding bar is stopped at an outer end of longitudinal chute when the expansion mechanism is unfolded.

7. The expansion mechanism for a medal storage box, according to claim 5, wherein an upper part of the floating lever is assembled with a note plate.

8. The expansion mechanism for a medal storage box, according to claim 5, wherein a flexible element is provided, with an end of the flexible element being assembled at the left connection point, and the other end of the flexible element being assembled at a contact point provided by the cover body.

9. An expansion mechanism for a medal storage box, being linked directly to change between a storage posture and a display posture of the medal by exerting a single action force, comprising a storage box, which is provided with a lower box unit, with an interior of the lower box unit being an operating space, an upper surface of the operating space being a flat surface, and a rear side of the lower box unit being connected to a cover body through a connection pivot;an expansion mechanism, which is assembled in the operating space, with a working plane of the expansion mechanism being parallel to a direction in which a cover body is opened and closed, the expansion mechanism being provided with an extension strut, an outer end of the extension strut being connected outward with a support structure, and the expansion mechanism being a pushing mechanism which further includesa bottom fixing rod which is fixed on a side of the operating space, with two ends of the bottom fixing rod being connected to a left swing rod and a right swing rod through a left pivot and a right pivot respectively, a free end of the left swing rod and the right swing rod being connected to two ends of a floating lever through a left connection point and a right connection point respectively, forming a parallel mechanism;a pushing rod, an end of which is coaxially connected at the right connection point, with the other end of the pushing rod being connected to an inner end of the extension strut through a variable connection point;an extension arm, with an end of which being fixed and assembled with the left swing arm through an assembly portion, and the other end of the extension arm being connected to a pushing pivot;a swing arm, with an end of which being fixed relatively on an inner side of the cover body, and the other end of the swing arm being provided with a back pushing pivot, wherein a repelling pivot is disposed on the swing arm, at a place away from the back pushing pivot toward the cover body;a pushing link rod, with an end of which being connected to the pushing pivot, and the other end of the pushing link rod being connected to the repelling pivot; anda back pushing rod, with an end of which being connected to the back pushing pivot, and the other end of the back pushing rod being connected to a connection point provided by the support structure.

10. The expansion mechanism for a medal storage box, according to claim 9, wherein a note plate is assembled above the floating lever, next to the right connection point.

11. The expansion mechanism for a medal storage box, according to claim 9, wherein a total length of pushing rod is smaller than that of the floating lever.

12. The expansion mechanism for a medal storage box, according to claim 9, wherein the bottom fixing rod is fixed in the operating space, with the level being higher than the level space in which the pushing pivot swings linearly.