BACKGROUND
1. Field of the Invention
The present invention relates to toothpick dispensers, and more particularly, to automated sanitary toothpick dispensers.
2. Description of Related Art
Toothpick dispensers have been around for many years. For example, FIG. 1 shows a cutout, side view of a conventional toothpick dispenser 100. Dispenser 100 includes a housing 104 that carries a plurality of toothpicks 102. Top lid 106 pivotally attaches to joint 108 for pivotally rotation about arc A. A user may pivotally rotate lid 106 for restocking toothpicks 102 within housing 104. The user pushes a slide member 110 for retrieving toothpick 102, as shown with arrow B. Slide member 110 attaches to a spring 114 and includes a delivery slot 112 for placement of toothpick 102.
Dispenser 100 is one of many known dispensers. The known dispensers share a common problem, i.e., the dispensers and toothpicks within the dispensers typically are contaminated with the germs from multiple users. For example, dispenser 100 provides means wherein the user could open lid 106, reach into housing 104, and grab several toothpicks 102. As a result, the user contaminates unused toothpicks 102 and exposes the outside surface of dispenser 100 with germs.
Other types of toothpick dispensers use individually wrapped toothpicks. These embodiments create additional problems, such as increased manufacturing costs and litter caused by users failing to properly dispose of the paper wrappers.
Although great strides have been made in the are of toothpick dispensers, considerable shortcomings remain.
DESCRIPTION OF THE DRAWINGS
The novel features believed characteristic of the invention are set forth in the appended claims. However, the invention itself, as well as a preferred mode of use, and further objectives and advantages thereof, will best be understood by reference to the following detailed description when read in conjunction with the accompanying drawings, wherein:
FIG. 1 is a side cross-sectional view of a conventional toothpick dispenser;
FIG. 2 is an oblique view of the preferred embodiment of an automated toothpick dispenser according to the present application;
FIG. 3 is a longitudinal cross-sectional view of the toothpick dispenser of FIG. 2 shown in a retracted mode;
FIG. 4 is a longitudinal cross-sectional view of the toothpick dispenser of FIG. 2 shown in an extended mode;
FIG. 5 is an enlarged side view of a rod of the toothpick dispenser of FIG. 2;
FIG. 6 is a cross-sectional view of the rod of FIG. 5 taken at VI-VI;
FIG. 7 is a transverse cross-sectional view of the toothpick dispenser of FIG. 2;
FIG. 8 is a schematic of a shaker cam of the toothpick dispenser of FIG. 2;
FIG. 9 is a schematic of a dispenser cam of the toothpick dispenser of FIG. 2; and
FIGS. 10 and 11 are schematic diagrams of electrical and mechanical components of the dispenser of FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The automated toothpick dispenser of the present application overcomes the disadvantages of conventional toothpick dispensers. Illustrative embodiments are described below. It will of course be appreciated that in the development of any actual embodiment, numerous implementation-specific decisions will be made to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
Referring to FIG. 2 in the drawings, an oblique view of the preferred embodiment of an automated toothpick dispenser 200 according to the present application is illustrated. Dispenser 200 includes a housing 202 and a chamber 204 releasably coupled to housing 202. Housing 202 houses and supports various components for the operation of dispenser 200. Housing 202 may optionally include one or more footings 206 to support housing 202, prevent housing 202 from slipping, and to provide vibration isolation, if desirable. Chamber 204 is configured to store a plurality of toothpicks 102, and includes a first chamber portion 212 and a second chamber portion 214. A used herein, first chamber portion 212 may also be referred to as lower chamber portion 212, and second chamber portion 214 may also be referred to as upper chamber portion 214. In addition, as explained in more detail below, chamber 204 is also configured to dispense a single toothpick 102 during operation of dispenser 200.
Dispenser 200 preferably includes one or more sensors 208 for sensing the presence of a user. In the preferred embodiment, sensor 208 is a motion sensor that detects when a user's hand or finger passes near housing 202. However, it will be appreciated that sensor 208 may be any of a wide variety of sensors, including motion detectors, proximity sensors, heat sensors, infrared sensors, or any other suitable type of sensor. In an alternative embodiment, sensor 208 may be replaced or augmented by a switch, activation button, or lever.
In addition, dispenser 200 preferably includes an automated electrical system powered by an electrical power source 700 (see FIG. 7), such as a DC battery or DC battery pack. However, it will be appreciated that dispenser 200 may be powered by other means, such as a rechargeable electrical system, in which case, an optional solar energy system, represented by a solar collector 210 and a recharging system 708 (see FIG. 7), may be used to partially or totally recharge the rechargeable electrical power source. In such alternative embodiments, the rechargeable electrical power source could be one or more rechargeable batteries, one or more rechargeable battery packs, or any other suitable rechargeable electrical power source. Other means for powering dispenser 200 and/or recharging the rechargeable electrical power source include the use of interchangeable battery packs, and the use of an AC power source, such as a wall outlet. In those embodiments in which dispenser 200 is connected to a high-voltage AC power source, it may be desirable to utilize a Voltage regulator and/or an AC/DC power converter or transformer.
In the preferred embodiment, housing 202 is rectangular in shape; however, it should be understood that housing 202 and/or chamber 204 may be configured in many different shapes and sizes, including fanciful or collectible shapes, such as animal shapes, monument shapes, and shapes of various inanimate objects. In addition, although chamber 204 has been shown as protruding from the top of housing 202, it will be appreciated that chamber 204 may be partially or totally recessed or contained within housing 202. In addition, although sensor 208 and optional solar collector 210 have been shown positioned on a top surface 216 of housing 202, it should be understood that sensor 208 and optional solar collector 210 may be located at various locations on housing 202 or chamber 204.
Dispenser 200 is operable between a retracted mode, in which toothpicks 102 remain contained within chamber 204, and an extended mode, in which a single toothpick 102 is at least partially exposed outside of chamber 204. It is preferred that dispenser 200 remain in the retracted mode when not in use. This prevents toothpicks 102 from being exposed to contaminants. As explained in detail herein, when a user passes his hand or finger near sensor 208, sensor 208 causes dispenser 200 to transition into the extended mode, thereby causing a single toothpick 102 to be partially or fully extended beyond chamber 204 and housing 202.
Referring now also to FIGS. 3 and 4 in the drawings, dispenser 200 is shown in longitudinal cross-section views. FIG. 3 depicts dispenser 200 in the retracted mode, and FIG. 4 depicts dispenser 200 in the extended mode. As is shown, chamber 204 includes an inner surface 300, a bottom surface 302, and an upper surface 304. An upper aperture 306 passes through upper surface 304. A lower aperture 308 passes through bottom surface 302. Upper chamber portion 214 is preferably coupled to lower chamber portion 212 by a releasable fastening means 310 to facilitate restocking of toothpicks 102 in chamber 204. In the preferred embodiment, releasable fastening means 310 is a threaded coupling 307, 309; however, it will be appreciated that releasable fastening means may be a clip, clamp, quick-release, or any other suitable fastening means. it is also preferred that bottom surface 302 be configured to taper downwardly and inwardly toward lower aperture 308. This causes toothpicks 102 to gravitate toward the center of chamber 204 and toward lower aperture 308. Upper surface 304 is configured to taper upwardly and inwardly toward the center of chamber 204 and toward upper aperture 306. This causes the single toothpick 102 to move toward the center of chamber 204 and toward upper aperture 306 as the single toothpick 102 is extracted.
Dispenser 200 includes a lift system 311 for extracting a single toothpick 102 out from chamber 204 in response to activation of sensor 208. Lift system 311 includes an extraction rod 312 coupled to a link system 314. Link system 314 preferably includes links 318, 320, and 322, which are pivotally coupled together at pivot joints 324 and 326. Link 322 is pivotally coupled at a pivot joint 328 to a support member 742 (see FIG. 7), which is rigidly attached to housing 202. As shown in FIG. 4, extraction rod 312 slidingly passes through lower aperture 308 for elevating a single toothpick 102 through channel 306. Extraction rod 312 is coupled to a dispenser cam 316 via link system 314, such that rotation of dispenser cam 316 in a direction indicated by arrow C causes extraction rod 312 to translate relative to lower aperture 308 in a direction indicated by arrow E. Link 322 includes an elongated slot 330 for receiving a guide pin 332 that is eccentrically attached to dispenser cam 316. This configuration causes link 322 to pivot about pivot joint 328 in response to rotation of dispenser cam 316.
Referring now also to FIGS. 5 and 6 in the drawings, enlarged views of extraction rod 312 are shown. FIG. 5 is a side view of extraction rod 312, and FIG. 6 is a cross-sectional view of extraction rod 312 taken at VI-VI of FIG. 5. As shown in FIG. 5, rod 312 includes a lower end 500 and an upper end 502. Lower end 500 is adapted for releasable attachment to link 318, preferably by a threaded coupling, as shown in FIG. 5. In an alternative embodiment, extraction rod 312 is integrally formed with link 318. Upper end 502 is configured with a bore 600 for receiving the lower end of a single toothpick 102. As shown in FIG. 6, bore 600 is preferably frusto-conical in shape, having a curved upper surface 602, inwardly sloping side walls 604, and a flat bottom surface 606. This configuration ensures that a single toothpick 102 enters bore 600 as extraction rod 312 is pushed upward. Bore 600 has a depth L and a bottom diameter D. In the preferred embodiment, L is approximately 0.05 inches and D is approximately 0.028 inches. This configuration creates close tolerances between toothpicks 102 and slot 600, thereby restricting movement of toothpick 102 relative to upper end 502 as extraction rod 312 elevates toothpick 102 during dispensing mode. It will be appreciated that a wide range of lengths L and diameter D may be used to facilitate use with toothpicks of varying shapes and sizes. It is preferred that in the retracted mode, upper end 502 is retracted to a position substantially level or just below bottom surface 302. This ensures that a single toothpick 102 will fall into bore 600 during the retracted mode.
Referring now also to FIG. 7 in the drawings, dispenser 200 is shown in a transverse cross-section view. As is shown, housing 202 carries electrical power source 700, a drive system 701, a switch system 715, a shaker system 705, and optional recharging system 708. In the preferred embodiment, electrical power source 700 is one or more DC batteries. Drive system 701 includes one more drive mechanisms, including a dispenser motor 702, a gear system 704, and link system 314. Mounting brackets 710, 712, and 714 support electrical power source 700, motor 702, and motor 706, respectively. In the preferred embodiment, gear system 704 includes a driving gear 716 and a driven gear 718. Driving gear 716 is coupled to dispenser motor 702 via a shaft 730. Dispenser cam 316 and shaker cam 720 are rotatably carried by a shaft 732 coupled to driven gear 718. Shafts 730 and 732, driving gear 716, and driven gear 718 are supported by support members 734 and 736, respectively. Switch system 715 includes dispenser cam 316 having a recessed notch 334, a dispenser switch 728, a shaker cam 720 having an upraised portion 724, and a shaker switch 726. Upraised portion 724 and recessed notch 334 are operably associated with shaker switch 726 and dispenser switch 728, respectively.
A weight 740 is eccentrically coupled to a shaft 738 of shaker motor 706. In addition, shaker motor 706 is coupled to chamber 204, such that activation of shaker motor 706 and weight 740 causes chamber 204 to vibrate. The vibrations imparted to chamber 204 from shaker motor 706 cause toothpicks 102 to reposition within chamber 204 by sliding down surface 302 into slot 600.
Referring now also to FIGS. 8 and 9 in the drawings, the operation of dispenser cam 316 and shaker cam 720 are illustrated. In the preferred embodiment, dispenser cam 316 and shaker cam 720 are configured, dimensioned, and oriented relative to each other, such that dispenser switch 728 and shaker switch 726 are selectively aligned, thereby activating at selected timing intervals. As is shown, both dispenser cam 316 and shaker cam 720 are simultaneously driven by shaft 732 and rotate at the same rotational velocity. As shown in FIG. 8, shaker switch 726 includes a switch lever 800. When upraised portion 724 engages switch lever 800, an electrical circuit is completed, thereby activating shaker motor 706. As shown in FIG. 9, dispenser switch 728 includes a switch lever 900. When switch lever 900 encounters recessed portion 334, an electrical circuit is opened, thereby deactivating dispenser motor 702. It will be appreciated that in alternative embodiments, other types of systems and components could be used in lieu of cams, gears, and linkages. For example, an electrical relay and timer could activate and deactivate dispenser motor 702 and shaker motor 706, or a piezoelectric telescoping actuator could be used in lieu of extraction rod 312.
Referring now also to FIG. 10 in the drawings, a simplified schematic diagram of an electrical system 1000 for dispenser 200 is illustrated. Electrical system 1000 includes dispenser motor 702, dispenser switch 726, shaker motor 706, shaker switch 728, dispenser cam 316, and shaker cam 720, sensor 208, and power source 700. As is shown, the components of electrical system 100 are conductively coupled together via a plurality of conductors 1002. In the interest of clarity, only one conductor 1002 is labeled. Electrical system 1000 includes two circuits C1 and C2. Circuit C1 includes shaker switch 728, shaker motor 702, and power source 700. Circuit C2 includes sensor 208, power source 700, dispenser switch 726, and dispenser motor 702. As shown in FIG. 10, circuits C1 and C2 are open, i.e., dispenser motor 702 and shaker motor 706 are not provided electrical current from power device source 700. When circuits C1 and C2 are closed, dispenser motor 702 and shaker motor 706 are activated, i.e., provided electrical current from power source 700.
Upon detection of the user, sensor 208 closes circuit C2, thereby providing electrical current from power source 700 to dispenser motor 702. Dispenser motor 702 rotates gear 716, which in turn rotates dispenser cam 316 and shaker cam 720. During this time, dispenser cam 316 pivots link system 314, which elevates and retracts extraction rod 312. Dispenser motor 702 remains activated until switch lever 900 of dispenser switch 728 encounters recessed portion 334. After a short duration of time, sensor 208 resets and reopens circuit C2. Circuit C1 remains open until upraised portion 724 comes into contact with switch lever 800 of shaker switch 726. Electrical power is provided to the shaker motor 706 when circuit C1 closes. Shaker motor 706 rotates weight 740, which causes vibrations within chamber 204 for repositioning toothpicks 102. This allows extraction rod 312 to receive a single toothpick 102 and push that toothpick 102 at least partially through aperture 306 in upper portion 304 of chamber 204, where toothpick 102 may be easily grasped and taken by the user without contamination of the other toothpicks 102 within chamber 204.
Referring now to FIG. 11 in the drawings, an alternative electrical system 1100 for dispenser 200 is illustrated. Electrical system 1100 is substantially similar in form and function to electrical system 1000; however, electrical system 1100 includes optional recharging system 708 and solar collector 210 for recharging power source 700, which in this embodiment, is a rechargeable electrical power source, such as rechargeable batteries. Electrical system 1100 includes a diode 1102 that prevents electrical current from returning to recharging system 708.
It should be understood that other configurations for dispenser 200 may be utilized without departing from the scope of the present application. For example, although chamber 204 has been shown in a generally vertical orientation, chamber 204 may be oriented in a more horizontal orientation. In such an embodiment, the walls of chamber 204 may be configured in a different manner, such as V-shaped, to allow a single toothpick to be dispensed during operation.
It is evident by the foregoing description that the sanitary automated toothpick dispenser of the subject application has significant benefits and advantages over known dispensers, including: (1) it provides means wherein a user may retrieve a toothpick without being exposed to germs from other users; and (2) it eliminates the need for toothpicks to be individually wrapped.
The particular embodiments disclosed above are illustrative only, as the invention may be modified and practiced in different but equivalent manners apparent to those skilled in the art having the benefit of the teachings herein. It is therefore evident that the particular embodiments disclosed above may be altered or modified, and all such variations are considered within the scope and spirit of the invention. Accordingly, the protection sought herein is as set forth in the description. Although the present invention is shown in a limited number of forms, it is not limited to just these forms, but is amenable to various changes and modifications without departing from the spirit thereof.
Patent Grant
8186543
