Control device suitable for bicycle provided with rest handle

Abstract

The invention provides a control device suitable for a bicycle provided with a rest handle. The control device is suitable for being attached to a handle main body of a rest handle, and is provided with a mounting base which is constructed to be suitable for being mounted to a free end of the handle main body; the electric control component is arranged on the mounting base and comprises an upshift control part and a downshift control part; and the operation component is movably connected to the mounting base and comprises an upshift operation part correspondingly touching the upshift control part and a downshift operation part correspondingly touching the downshift control part. The operating component is pivotally connected to the mounting base around a set axis, and the upshift operating part and the downshift operating part are arranged on the upper side and the lower side of the set axis, so that one of the upshift operating part and the downshift operating part can be operated by a downward pressing action, and the other one can be operated by an upward shifting action. Efficient and accurate control over upshift and downshift operation can be achieved, and meanwhile the integration level and the ergonomic performance are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, in particular to a control device suitable for a bicycle equipped with a rest handlebar. Background Art

[0002] With the advancement of electronic technology, electronic shifting systems are gradually being adopted in high-end bicycles. Existing control devices typically use push-button or touch-sensitive controls, located on the handlebars for easy operation. Within the cycling world, time trial bikes are also becoming increasingly popular. A TT bike, or Time Trial Bike (TT Bike), was originally used primarily for individual and team time trials, but is now also gaining popularity among everyday cyclists. A key feature of a TT bike is its aerobars. When using the aerobars, the rider supports their forearms on the padded handlebars and grips the front of the handlebars with both hands, leaning forward and lowering their body to a near-horizontal position. This significantly reduces the frontal area of ​​their body exposed to the wind and reduces wind resistance. Furthermore, this position provides a degree of "rest" for some muscles in the back, shoulders, and neck. Currently, the shifting mechanism on TT bikes on the market is primarily located on the main handlebars, and the aerobars typically lack a shifting function.

[0003] To this end, some improved prior art technologies include shift control devices installed on the aerobars. For example, Chinese invention patent publication number CN106467159B discloses an electrical bicycle control device. The shift control device is located on the side of the aerobars, and the rider's thumb is used to trigger the shift. However, because the control device is located on the side and the shift is operated by the thumb, the control device should not be too large. Furthermore, the shifting operation requires pressing, which makes it easy for the rider to make mistakes when pressing the shift button. For example, the intended upshift may trigger a downshift. This makes the human-computer interaction less user-friendly for the rider.

[0004] In view of this, it is necessary to propose a new technical solution to overcome the above-mentioned shortcomings. Summary of the Invention

[0005] The present invention provides a control device suitable for a bicycle equipped with a rest handlebar, which adopts a new operating component structure and movement mode to achieve single-handed efficient control of upshifting and downshifting operations, while improving the integration and ergonomic performance of the device.

[0006] To achieve the above object, the present invention adopts the following technical solution: a control device for a bicycle equipped with a resto bar, adapted to be attached to the handlebar body of the resto bar, the control device comprising: a mounting base configured to be mounted to the free end of the handle body; an electronic control component, disposed on the mounting base, comprising an upshift control unit for controlling upshifts of the bicycle and a downshift control unit for controlling downshifts of the bicycle; and an operating member movably connected to the mounting base, comprising an upshift operating portion for correspondingly actuating the upshift control portion and a downshift operating portion for correspondingly actuating the downshift control portion; In which, the operating member is pivotally connected to the mounting base around a set axis, and the upshift operating part and the downshift operating part are arranged on the upper and lower sides of the set axis, so that one of the upshift operating part and the downshift operating part can be operated by a downward pressing action, and the other can be operated by an upward pulling action, and when one of the upshift operating part and the downshift operating part is operated to touch the corresponding upshift control part or downshift control part, the other is away from the other corresponding downshift control part or upshift control part.

[0007] Optionally, the mounting base has a front end portion away from the handle body, and the operating member is provided on the front end portion of the mounting base.

[0008] Optionally, one of the upshift operating portion and the downshift operating portion located above the setting axis is disposed further forward than the other located below the setting axis.

[0009] Optionally, the middle portion of the front end portion is protruding forward to form a central convex portion, and the front end portion is provided with recessed portions on the upper and lower sides of the central convex portion for corresponding installation of the upshift operating portion and the downshift operating portion.

[0010] Optionally, the setting axis is arranged perpendicular to the central axis of the handle body, and the setting axis is defined by the central axis of the pivot shaft provided at the central convex portion.

[0011] Optionally, the upshift control unit and the downshift control unit are switch buttons respectively, and the directions of the pressing forces applied to the two switch buttons when they are touched are non-parallel.

[0012] Optionally, the electronic control component includes a circuit board having a first plate body extending transversely and a second plate body extending longitudinally, and the two switch buttons are respectively arranged on the first plate body and the second plate body.

[0013] Optionally, the upshift operating portion and the downshift operating portion respectively have a convex column arranged corresponding to the switch button, and the central axes of the two convex columns are in a vertical relationship.

[0014] Optionally, a soft rubber piece is provided between the operating member and the electronic control component, the soft rubber piece is fixed to the mounting base, and the operating member triggers the upshift operating part and the downshift operating part by squeezing the soft rubber piece to elastically deform.

[0015] Optionally, the mounting base has a blocking portion located on a side of the second plate away from the switch button provided thereon.

[0016] Optionally, the mounting base includes a hollow outer shell and a bracket disposed in the outer shell, and one end of the bracket abuts against the second plate to form the blocking portion.

[0017] Optionally, a battery holder is provided on the first plate, and the mounting base is provided with a battery insertion port for a button battery to be inserted through the battery insertion port and electrically connected to the battery holder.

[0018] Optionally, the button battery is inserted into the mounting base via a bracket, the bracket is screw-locked to the mounting base, and the bracket has a cover portion that closes the battery insertion port.

[0019] The present invention provides a control device suitable for a bicycle equipped with a rest handlebar, wherein the operating member is pivotally connected to the mounting base around a set axis, and the upshift operating part and the downshift operating part are arranged on the upper and lower sides of the set axis, so that one of the upshift operating part and the downshift operating part can be operated by a downward pressing action, and the other can be operated by an upward shifting action, and when one of the upshift operating part and the downshift operating part is operated to touch the corresponding upshift control part or downshift control part, the other is away from the other corresponding downshift control part or upshift control part; with such an arrangement, the operating accuracy is significantly improved through the upper and lower operating parts and the non-parallel pressing force directions. This design fully takes into account functionality, human-computer interaction friendliness and manufacturing feasibility, and provides an innovative rest handlebar solution for high-end speed-changing bicycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] Figure 1 It is a three-dimensional diagram of two handlebars of an embodiment of a rest handlebar according to the present invention.

[0022] Figure 2 It is a three-dimensional diagram of a rest handlebar in one embodiment of the rest handlebar according to the present invention.

[0023] Figure 3 yes Figure 2 Exploded perspective view of the components shown.

[0024] Figure 4 yes Figure 2 Exploded perspective view showing another perspective of the component shown.

[0025] Figure 5 yes Figure 2A perspective view of the electronic control components in the shown parts.

[0026] Figure 6 yes Figure 2 A perspective view of the operating member of the shown components.

[0027] Figure 7 yes Figure 2 Cross-sectional view of the components shown.

[0028] Explanation of the accompanying drawings: 10. Handle body; 20. Control device; 1. Mounting base; 11. Outer shell; 110. Battery insertion port; 111. Middle convex portion; 112. Concave portion; 12. Soft rubber part; 13. Bracket; 131. Retaining portion; 2. Electronic control component; 21. First plate; 211. Upshift control portion; 22. Second plate; 221. Downshift control portion; 23. Battery holder; 3. Operating member; 31. Pivot portion; 32. Downshift operating portion; 33. Upshift operating portion; 34. Return spring; 35. Pivot shaft; 301. Boss; 4. Button battery; 41. Bracket; 5. Connector; 6. Cable. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention generally described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] Unless otherwise defined, technical or scientific terms used in this patent document shall have the ordinary meanings understood by persons of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar expressions used in the specification and claims of this invention do not denote any order, quantity, or importance, but are merely used to distinguish one component from another. Similarly, terms such as "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects preceding the phrase "include" or "comprising" include the elements or objects listed after the phrase and their equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used solely to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are used solely to facilitate the description of the invention and to simplify the description. They are not intended to indicate or imply that the device or component referred to must have, be constructed, or operate in a specific orientation, and are not to be construed as limitations on the invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0033] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0034] See also Figures 1 to 7 As shown, the present invention discloses a control device 20 suitable for a bicycle equipped with a rest handlebar. The control device 20 is suitable for being attached to the handlebar body 10 of the rest handlebar. The rest handlebar is attached to the handlebar of the bicycle to provide support for the arms of the cyclist. Figure 1 As shown, the aerobars are a pair of handlebars, including a left handlebar and a right handlebar. The two handlebars are symmetrically arranged, and each handlebar is provided with a control device 20. The control device 20 on one of the two handlebars is used, for example, to control the upshifting of the rear derailleur, and the other is used, for example, to control the upshifting of the front derailleur. Since the two handlebars are symmetrically arranged, this article mainly uses one of the two handlebars as an example to describe the specific components included therein.

[0035] like Figures 2 to 4As shown, the aerobar includes a handlebar body 10 and a control device 20. The handlebar body 10 has one end attached to the handlebar of a bicycle and the other end free. The control device 20 is mounted on the free end of the handlebar body 10. The control device 20 comprises a mounting base 1, an electronic control component 2, and an operating member 3. The mounting base 1 is configured to be mounted on the free end of the handlebar body 10. The electronic control component 2 is mounted on the mounting base 1 and includes an upshift control unit 211 for controlling upshifts on the bicycle and a downshift control unit 221 for controlling downshifts on the bicycle. The operating member 3 is movably connected to the mounting base 1 and includes an upshift operating unit 33 that activates the upshift control unit 211 and a downshift operating unit 32 that activates the downshift control unit 221. The operating member 3 is pivotally connected to the mounting base 1 about a setting axis R2. The upshift operating portion 33 and the downshift operating portion 32 are located above and below the setting axis R2, respectively, so that one of the upshift operating portion 33 and the downshift operating portion 32 can be operated by a downward push, while the other can be operated by an upward push. Furthermore, when one of the upshift operating portion 33 and the downshift operating portion 32 is operated to contact the corresponding upshift control portion 211 or downshift control portion 221, the other moves away from the corresponding downshift control portion 221 or upshift control portion 211.

[0036] The control device 20 provided by the present invention has an operating member 3 pivotally connected to the mounting base 1 about a set axis R2. The upshift operating portion 33 and the downshift operating portion 32 are located above and below the set axis, respectively. This allows one of the upshift operating portion 33 and the downshift operating portion 32 to be operated by a downward pressure action, while the other can be operated by an upward shifting action. Furthermore, the upshift operating portion 33 and the downshift operating portion 32 exhibit a seesaw motion about the set axis R2. This arrangement, with its upper and lower operating portions and non-parallel pressure directions, allows for distinct upshift and downshift actions, significantly improving operational accuracy and convenience. This design fully balances functionality, user-friendly human-machine interaction, and manufacturing feasibility, providing an innovative aerobar solution for high-end speed-shifting bicycles.

[0037] like Figures 2 to 4 As shown, one end of the handlebar body 10 is fixed to the bicycle handlebar (not shown), and the other end is free. The handlebar body 10 can be detachably mounted to the bicycle handlebar, or it can be fixed to the handlebar by a non-detachable method such as welding. Typically, a pair of aerobars are positioned between a pair of main handlebars. In this embodiment, the handlebar body 10 is a tube with a central axis R1 extending in the front-to-back direction. The free end of the handlebar body 10 is the front end.

[0038] The control device 20 is installed on the free end, which includes a mounting base 1, an electric control component 2 and an operating member 3. The mounting base 1 serves as a mounting carrier for the electric control component 2 and the operating member 3, etc., and extends from the front end of the handlebar body 10 to form an operating area for the operating member 3. The mounting base 1 is mounted to the handlebar body 10 by a connecting piece 5. One end of the connecting piece 5 can be inserted into the handlebar body 10, and the other end can be connected to the mounting base 1 by screws, buckles or other structures. In this embodiment, the electric control component 2 in the control device 20 is connected to the derailleur by a cable 6, which passes through the connecting piece 5 into the handlebar body 10. The electric control component 2 is electrically connected to the bicycle shifting system through the cable 6, which is routed through the inside of the handlebar body 10 to the frame, ensuring a clean appearance and avoiding cable interference while riding. In other embodiments, the control device 20 can also transmit control signals in a wireless manner, so the cable 6 can be eliminated.

[0039] In this embodiment, the mounting base 1 has a front end portion away from the handlebar body 10, and the operating member 3 is arranged on the front end portion of the mounting base 1. The operating member 3 is arranged on the front end portion, and the hand of the rider is located at the front end portion of the handlebar body 10 when riding. The flexibility of operation in the front end portion area is greater, making it easier to operate the thumb, index finger and middle finger. Compared with being arranged on the side, more diverse and convenient operation modes can be achieved.

[0040] In this embodiment, the mounting base 1 includes a hollow outer housing 11, a soft rubber piece 12 and a bracket 13. The front end portion of the outer housing 11 is protruded forward to form a middle protrusion 111, and the upper side and the lower side of the middle protrusion 111 are respectively provided with recesses 112 for providing space for the installation and operation of the upshift operation portion 33 and the downshift operation portion 32 of the operating member 3. The soft rubber piece 12 is arranged between the operating member 3 and the electric control component 2, and the soft rubber piece 12 is fixed to the outer housing 11 of the mounting base 1. The operating member 3 triggers the upshift operation portion 33 and the downshift operation portion 32 by elastically deforming the soft rubber piece 12. The soft rubber piece 12 is an elastic rubber piece, which can play a sealing role and prevent liquids, dust and other substances from entering the inside of the mounting base 1 through the gap between the operating member 3 and the mounting base 1 to protect the electric control component 2. The bracket 13 provides support for the installation of the electric control component 2. The specific connection relationship and role of the bracket 13 and the electric control component 2 will be described later.

[0041] As Figures 3 to 5As shown, the electronic control component 2 is disposed inside the mounting base 1. The electronic control component 2 includes a circuit board having a first plate 21 extending transversely and a second plate 22 extending longitudinally. In this embodiment, the upshift control unit 211 and the downshift control unit 221 are switch buttons, respectively disposed on the first plate 21 and the second plate 22. When the two switch buttons are activated, the direction of the pressing force they receive is non-parallel. Specifically, as Figure 5 As shown, the circuit board is composed of a first plate 21 extending horizontally and a second plate 22 extending longitudinally, connected vertically to form an L-shaped structure. The first plate 21 is provided with an upshift control unit 211, a switch button located on the bottom surface of the first plate 21 and actuated by downward pressure. The second plate 22 is provided with a downshift control unit 221, a switch button located on the front surface of the second plate 22 and actuated by forward pressure. In other words, the pressure acting on the two switch buttons is non-parallel, and in this embodiment, is perpendicular to each other.

[0042] Because the second plate 22 extends longitudinally and is subjected to force transversely, to prevent the second plate 22 from being displaced by force and causing tilt or damage, in this embodiment, the mounting base 1 includes a stopper 131 located on the side of the second plate 22 facing away from the switch button. The stopper 131 supports the backside of the second plate 22, that is, the side facing away from the downshift control unit 221. In this embodiment, the mounting base 1 includes a hollow outer shell 11 and a bracket 13 disposed within the outer shell 11. The bracket 13 is fixed within the outer shell 11, with one end of the bracket 13 abutting against the second plate 22 to form the stopper 131.

[0043] In this embodiment, a battery holder 23 is provided on the first plate 21, and the mounting base 1 is provided with a battery insertion port 110 for the button battery 4 to be inserted from the battery insertion port 110 and electrically connected to the battery holder 23. Furthermore, the button battery 4 is inserted into the mounting base 1 via a bracket 41. The bracket 41 has an insertion portion that can clamp the button battery 4 and a cover portion connected to one end of the insertion portion, and the cross-section formed by the cover portion and the insertion portion is T-shaped. The insertion portion carries the button battery 4 and is inserted into the battery holder 23, and the cover portion closes the battery insertion port 110. The bracket 41 is screw-locked to the mounting base 1, and specifically, the screws pass through both ends of the cover portion to lock the bracket 41, the bracket 13 and the outer shell 11.

[0044] See also Figures 2 to 4 and Figure 6As shown, the operating member 3 is pivotally connected to the central convex portion 111 of the mounting base 1 via a pivot shaft 35 about a setting axis R2. The setting axis R2 is perpendicular to the central axis of the handlebar body 10. The operating member 3 includes a pivot portion 31, an upshift operating portion 33, and a downshift operating portion 32, both located above and below the setting axis R2. The upshift operating portion 33 and the downshift operating portion 32 located above the setting axis are positioned more forward than those located below the setting axis. The upshift operating portion 33 and the downshift operating portion 32 are typically activated by downward pressure from the thumb, while the downshift operating portion is primarily activated by upward movement from the index or middle finger. Therefore, the forward positioning of the upshift operating portion is more ergonomically suited to hand posture during riding. Furthermore, the setting axis R2 is perpendicular to the central axis R1 of the handlebar body 10 and is defined by the central axis of the pivot shaft 35 located at the central convex portion 111. Specifically, in this embodiment, the downshift operating unit 32 is located above the set axis, while the upshift operating unit 33 is located below. This allows for a downward shift, while an upward shift, which is more consistent with everyday thinking. This allows the rider to distinguish between different upshift and downshift actions. It should be noted that in other embodiments, the downshift operating unit 32 may be located below, while the upshift operating unit 33 may be located above. Furthermore, the above-described above upper and lower positions are merely relative. In some embodiments, the upshift and downshift operating units may also be arranged diagonally above, diagonally below, or left to right.

[0045] In this embodiment, the upshift operating member 33 and the downshift operating member 32 each have a boss 301 corresponding to the switch button. The central axes of the two bosses 301 are perpendicular to each other. The vertical axes of the two bosses 301 correspond to the pressing force directions of the two switch buttons, ensuring triggering reliability. A return spring 34 is mounted on each of the bosses 301. The return spring 34 provides elastic force to the operating member 3, maintaining the operating member 3 in its initial position when no force is applied.

[0046] See also Figure 7 As shown, when the rider uses the aerobars, the rider's palm is located on the mounting base 1, the thumb is in a naturally drooping position near the upper side of the front end of the mounting base 1, and the other four fingers are in a naturally bent position near the lower side of the front end of the mounting base 1. When the rider needs to shift up, the shift-up operating part 33 is raised, and the operating member 3 rotates clockwise around the pivot shaft 35 (by Figure 7From a different perspective, the boss 301 of the upshift operating member 33 presses against the upshift control member 211 on the first plate 21 through the soft rubber member 12, triggering an upshift signal. At this point, the downshift operating member 32 rotates with the operating member 3 and moves away from the downshift control member 221 on the second plate 22, preventing accidental activation. Conversely, when the downshift operating member 32 is pressed downward, the operating member 3 rotates counterclockwise, triggering the downshift control member 221 and simultaneously moving the upshift operating member 33 away from the upshift control member 211.

[0047] As can be seen from the above description of the specific embodiment, the control device 20 provided in this embodiment is integrated into the free end of the aerobar. The unique design of the operating member 3 allows for differentiated upshifting and downshifting, effectively preventing accidental activation and enhancing user-friendly interaction. Compared to existing technologies, the aerobar of this embodiment integrates the shifting function into the front operating area, meeting the low-drag design requirements of TT bikes. The upper and lower operating sections and non-parallel pressure directions significantly improve operational accuracy. This design fully balances functionality, user-friendly interaction, and manufacturing feasibility, providing an innovative aerobar solution for high-end geared bicycles.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A control device for a bicycle equipped with a rest handlebar, adapted to be attached to the handlebar body of the rest handlebar, characterized in that: The control device has: a mounting base configured to be mounted to the free end of the handle body; an electronic control component, disposed on the mounting base, comprising an upshift control unit for controlling upshifting of the bicycle and a downshift control unit for controlling downshifting of the bicycle; as well as an operating member movably connected to the mounting base, comprising an upshift operating portion for correspondingly actuating the upshift control portion and a downshift operating portion for correspondingly actuating the downshift control portion; In which, the operating member is pivotally connected to the mounting base around a set axis, and the upshift operating part and the downshift operating part are arranged on the upper and lower sides of the set axis, so that one of the upshift operating part and the downshift operating part can be operated by a downward pressing action, and the other can be operated by an upward pulling action, and when one of the upshift operating part and the downshift operating part is operated to touch the corresponding upshift control part or downshift control part, the other is away from the other corresponding downshift control part or upshift control part.

2. The control device for a bicycle equipped with aerobars according to claim 1, wherein: The mounting base has a front end portion away from the handle body, and the operating member is arranged on the front end portion of the mounting base.

3. The control device for a bicycle equipped with aerobars according to claim 1 or 2, wherein: The upshift operating portion and the downshift operating portion, whichever is located above the setting axis, are disposed further forward than the portion located below the setting axis.

4. The control device for a bicycle equipped with aerobars according to claim 2, wherein: The middle portion of the front end portion is convexly arranged to form a central convex portion, and the front end portion is provided with recessed portions for correspondingly installing the upshift operating portion and the downshift operating portion on the upper side and the lower side of the central convex portion.

5. The control device for a bicycle equipped with aerobars according to claim 4, wherein: The setting axis is arranged perpendicular to the central axis of the handle body, and the setting axis is defined by the central axis of the pivot shaft arranged at the central convex portion.

6. The control device for a bicycle equipped with aerobars according to claim 1 or 2, wherein: The upshift control unit and the downshift control unit are switch buttons respectively. When the two switch buttons are touched, the directions of the pressing forces they receive are non-parallel.

7. The control device for a bicycle equipped with aerobars according to claim 6, wherein: The electric control component includes a circuit board having a first plate body extending transversely and a second plate body extending longitudinally. The two switch buttons are respectively arranged on the first plate body and the second plate body.

8. The control device for a bicycle equipped with aerobars according to claim 7, wherein: The upshift operating part and the downshift operating part respectively have convex columns arranged corresponding to the switch buttons, and the central axes of the two convex columns are in a vertical relationship.

9. The control device for a bicycle equipped with aerobars according to claim 6, wherein: A soft rubber piece is provided between the operating member and the electronic control component, and the soft rubber piece is fixed to the mounting base. The operating member triggers the upshift operating part and the downshift operating part by squeezing the soft rubber piece to elastically deform.

10. The control device for a bicycle equipped with aerobars according to claim 7, wherein: The mounting base has a blocking portion located on a side of the second plate away from the switch button provided thereon; Preferably, the mounting base comprises a hollow outer shell and a bracket disposed in the outer shell, and one end of the bracket abuts against the second plate to form the abutting portion; Preferably, a battery holder is provided on the first plate, and the mounting base is provided with a battery insertion port for a button battery to be inserted through the battery insertion port and electrically connected to the battery holder; Preferably, the button battery is inserted into the mounting base via a bracket, the bracket is screw-locked to the mounting base, and the bracket has a cover portion for closing the battery insertion port.

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