The subject matter herein generally relates to a vibrator, and more particularly to a linear vibrator.
A vibrator is used as a non-audible input signal generator installed in a portable electronic product (such as a mobile phone, a game machine or other portable terminals). With the portable electronic product miniaturization and intelligence, smaller size and better performance of the vibrator for the portable electronic product is required.
Conventional linear vibrators are typically made of two types. One type of linear vibrator includes two magnets and a yoke, the two magnets are spliced on the yoke and completely in contact with the weight. The two magnets and the weight have a reciprocating linear motion along an axial direction relative to a shell of the linear vibrator. The movement of the weight needs an axis to guide. The linear vibrator with the above structure is difficult to assemble and the axis can easily deform. Another type of linear vibrator has a coil surrounding the weight and a supporting structure. The weight has a protrusion to be attached to the supporting structure. The coil and the weight have a reciprocating linear motion along with the supporting structure. This linear vibrator has low reliability and is unstable.
These problems with the two types of linear vibrators affect the user experience. Improvement in the art is preferred.
Implementations of the present disclosure will now be described with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the exemplary embodiments described herein. However, it will be understood by those of ordinary skill in the art that the exemplary embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the exemplary embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like reference numerals indicate the same or similar elements. It should be noted that references to “an” or “one” exemplary embodiment in this disclosure are not necessarily to the same exemplary embodiment, and such references can mean “at least one”.
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The receiving chamber 24 has two first grooves 241, two second grooves 242 and a first hole 243. The first hole 243 is in air communication with the two first grooves 241 and two second grooves 242. The two first grooves 241 each have a depth H1 and a length L. The two second grooves 242 each have a depth H2 and a width W.
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When assembled, the weight 20 is on the second cover 12 and mounted between the first elastic member 50 and the second elastic member 60. The shell 10 has a first internal surface 1220 and a second internal surface 1220′ opposite to the first internal surface 1220. A first elastic member 50 contacts the first internal surface 1220, and a second elastic member 60 contacts the second internal surface 1220′. In the exemplary embodiment, the first elastic member 50 has one end installed on an internal surface 1220 of the second side plate 122. The second elastic member 60 has one end installed on an internal surface 1220′ of another second side plate 122′ opposite to the second side plate 122. The first elastic member 50 has the other end contacting the first surface 21 of the weight 20. The other end of the second elastic member 60 contacts the second surface 21′ of the weight 20.
The two second side plates 122, 122′ are opposite to each other, each has a block 120 extended from the internal surface of each of the two second side plate 122 and 122′. The first surface 21 and the second surface 21′ each has a recess 210. The first elastic member 50 and the second elastic member 60 each have one end received by the recess 210, and the block 123 is embedded into the other end of the first elastic member 50 and the second elastic member 60. In another exemplary embodiment, the recess can be on the shell, and the block can be on the weight. The recess or the block can also be on the shell or the weight. Both the recess and the block support the first elastic member and the second elastic member. Stable movement of the weight 20 is improved because of the first elastic member 50 and the second elastic member 60 installed with the block 123 and the recess 210 and being supported by the block 123 and the recess 210.
The magnet 30 passes through the second hole 41 and is surrounded by the coil 40. The magnet 30 can move back and forth in the second hole 41. The magnet 30 and the coil 40 are together in the receiving chamber 24, and the magnet 30 is mounted between the first surface 21 and the second surface 21′. The width of the magnet 30 is equal to the width of the second groove 242, and the magnet 30 resists against the internal wall of the second groove 242. The magnet 30 is fastened on the receiving chamber 24, and the magnet 30 is static relative to the weight 20.
The coil 40 is positioned in the receiving chamber 4. There is a gap between the coil 40 and the first groove 241. There is another gap between the coil 40 and the second groove 242. The coil 40 passes through the receiving chamber 24 and extends out from the third surface 22 and the fourth surface (not shown). The first cover 11 is fastened on the second cover 12, the coil 40 contacts the first cover 11 and the second cover 12, and the coil 40 is fastened on the shell 10. The weight 20, the magnet 30, the coil 40, the first elastic member 50, and the second elastic member 60 are received in the receiving space 13.
When the linear vibrator 100 is in operation, the coil 40 is mounted on the shell 10. The coil 40 is not fastened on the weight 20, and the magnet 30 is mounted on the weight 20. The weight 20 and the magnet 30 move relative to the coil 40, and the movement direction of the coil 40 is the same as force directions of the first elastic member 50 and the second elastic member 60.
When the linear vibrator 100 receives an alternating current, the alternating current generates a changing magnetic field. The weight 20 and the magnet 30 move relative to the coil 40, and the weight 20 and the magnet 30 reciprocate with the changing magnetic field. The sensor 1242 triggers a signal of a certain amplitude after the coil 40 passes through the changing magnetic field. The signal feeds back to the external driving control unit 300 to adjust the signal output by the signal port 1251 on the connector 125. The amplitude is compensated for and controlled by the signal port 1251. The external power supply unit 200 and the external driving control unit 300 are arranged in a phone, a game machine, or other portable device.
In the exemplary embodiment, both of the coil and the magnet are in the weight. This facilitates simple assembly and decreases the overall volume taken up by the linear vibrator 100. The printed circuit 124 is on the shell 10 to electrical connect with the external supplying unit 200 and the external driving control 300 unit, for controlling and compensating for the amplitude when the linear vibrator 100 may become unstable.
The exemplary embodiments shown and described above are only examples. Many details are often found in the art such as the other features of linear vibrator. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, especially in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the exemplary embodiments described above may be modified within the scope of the claims.
Number | Date | Country | Kind |
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201710576652.3 | Jul 2017 | CN | national |