Rotary luggage case

Abstract

The invention discloses a rotary luggage case. A luggage case relates to the technical field of luggage cases and is characterized in that one end of a rear chamber is hinged and matched with one end of a front chamber, the bottom of the front chamber and the bottom of the rear chamber are oppositely provided with two first combination grooves and two second combination grooves respectively, and one side, far away from the front chamber, of the rear chamber is provided with a plurality of third combination grooves; the handle part is connected with the rear cavity, the handle part comprises a handle rotating part and a holding part, the handle rotating part is arranged at the lower end of the side, away from the front cavity, of the rear cavity, the handle rotating part is hinged to the rear cavity through a hinge, the holding part is connected with the end, away from the rear cavity, of the handle rotating part, and an extension button is arranged on the holding part; and the multiple moving device parts are arranged, and the multiple moving device parts are detachably arranged in the first combination groove, the second combination groove and the third combination groove. The rotary luggage case can be transformed into a draw-bar box mode and a trolley mode, and has the effect that the rotary luggage case can be used in various modes according to the requirements of a user.

Description

Technical Field

[0001] The present invention relates to the technical field of luggage cases, and more particularly to a rotating luggage case. Background Art

[0002] Generally, a suitcase or trolley case is a storage device designed to allow users to store and move items, and mainly includes wheels and handles for easy transportation. Such trolley cases are used in various situations such as traveling and business trips, and have various functions added to take into account user convenience.

[0003] Existing trolley cases can only be used in a general mobile mode, that is, a vertical mobile mode, or can only be used in a trolley form, that is, a horizontal mobile mode. These products have a simple structure and have limitations that fail to fully consider user convenience.

[0004] Therefore, how to provide a rotating suitcase that can flexibly change modes to adapt to various mobile environments and has an easily deformable structure is a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0005] In view of this, the present invention provides a rotating suitcase, which aims to solve one of the problems in the above-mentioned background technology, can flexibly change modes to adapt to various mobile environments, and has an easily deformable structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A rotating luggage case, comprising:

[0008] A front chamber and a rear chamber, wherein the rear chamber is hingedly adapted to one end of the front chamber, two first coupling grooves and a second coupling groove are respectively provided on the bottoms of the front chamber and the rear chamber, and a plurality of third coupling grooves are provided on a side of the rear chamber away from the front chamber;

[0009] a handle portion, the handle portion being connected to the rear chamber, the handle portion comprising a handle rotating portion and a gripping portion, the handle rotating portion being arranged at the lower end of the rear chamber away from the front chamber, the handle rotating portion being hinged to the rear chamber via a hinge, the gripping portion being connected to the end of the handle rotating portion away from the rear chamber, the gripping portion being arranged in a T-shape, and having an extension button provided on the gripping portion;

[0010] The moving device part is provided in plurality, and the plurality of the moving device parts are detachably provided in the first combining slot, the second combining slot and the third combining slot.

[0011] Furthermore, a recessed accommodating portion is provided on the side of the rear chamber away from the front chamber, the handle portion is provided in the accommodating portion, the handle portion also includes an inner handle tube and an outer handle tube, the inner handle tube is telescopically provided in the outer handle tube along the length direction, the gripping portion is connected to one end of the inner handle tube away from the outer handle tube, and one end of the outer handle tube away from the inner handle tube is connected to the handle rotating portion.

[0012] Furthermore, the handle rotating part includes a hinge connection assembly, a conversion guide and a rotating part cover, the hinge connection assembly is arranged in the accommodating part, the outer handle tube is hinged to the rear chamber through the hinge connection assembly, the conversion guide is rotatably connected to the hinge connection assembly, the conversion guide is provided with a guide groove, the guide groove is in contact with the outer handle tube, and the rotation range of the hinge connection assembly is limited by the guide groove, and the rotating part cover is sleeved on the hinge connection assembly.

[0013] Furthermore, the hinge connection assembly includes a hinge fixing component, a movable pin and a rotation spring, the hinge fixing component is sleeved on the bottom of the outer handle tube, the rotating part cover is sleeved on the hinge fixing component, the movable pin passes through and fixes the rotating part cover, the hinge fixing component and the outer handle tube, the conversion guide is rotatably set on the hinge fixing component through the movable pin, and the rotation spring is set between the movable pin and the hinge fixing component.

[0014] Furthermore, a conversion operating part is provided on the outer handle tube, and the conversion operating part includes a conversion handle and a conversion handle pin. The conversion handle is set on one end of the outer handle tube close to the inner handle tube, and the conversion handle is movably set on the outer handle tube through the conversion handle pin. The conversion handle pin is connected to the conversion guide through a conversion line.

[0015] Furthermore, the mobile device part includes a wheel and a wheel module, the wheel is provided with an axis contact part, the wheel module is arranged on the wheel through the axis contact part, and the wheel is arranged in the first coupling groove, the second coupling groove and the third coupling groove so as to be rotatable 360 ​​degrees through the wheel module.

[0016] Furthermore, the wheel module includes a wheel module button and a wheel module pin, one end of the wheel module button is adapted to the shaft contact portion, and the other end of the wheel module button is adapted to the first combining groove, the second combining groove and the third combining groove, two wheel module pins are arranged horizontally at intervals, and the two wheel module pins are vertically movably arranged in the wheel module button through a pin fixing component, the two wheel module pins are adapted to the shaft contact portion, and a wheel module spring is provided on the wheel module button.

[0017] As can be seen from the above technical solutions, compared with the prior art, the present invention provides a rotating suitcase that can be transformed into a trolley mode and a cart mode, and has the effect of being used in multiple ways according to the needs of users;

[0018] While maintaining the storage and mobility functions provided by the trolley case, it can be transformed into a trolley form, making it possible to load more luggage or carry heavy luggage more conveniently;

[0019] In addition, by combining the rear chamber and the handle with a hinge, the deformation process is simplified, and the movable pin and fixed structure make it stable for use in the trolley mode.

[0020] By applying the conversion operation part, users can easily switch modes without additional tools, and the strong structure can be maintained even after deformation, thus ensuring durability.

[0021] By making the mobile device into a detachable structure, the mobility in various environments can be maximized. In addition, the wheel module is designed to be easily replaceable and easy to maintain, which can further improve the user convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 An assembly diagram of the rotating luggage case provided by the present invention;

[0024] Figure 2 This is a schematic structural diagram of the rotating luggage case provided by the present invention (trolley case mode);

[0025] Figure 3 This is a schematic structural diagram of the rotating luggage case provided by the present invention (trolley mode);

[0026] Figure 4 A side view of the rotating luggage case provided by the present invention (in trolley case mode);

[0027] Figure 5 A schematic structural diagram of the handle portion provided by the present invention;

[0028] Figure 6 A schematic structural diagram of the grip portion provided by the present invention;

[0029] Figure 7A schematic diagram of the internal structure of the inner handle tube and the outer handle tube provided by the present invention;

[0030] Figure 8 This is a schematic structural diagram of the handle rotation part and the conversion operation part provided by the present invention;

[0031] Figure 9 A schematic diagram of the structure of the inner handle tube, the outer handle tube and the hinge connection assembly provided by the present invention;

[0032] Figure 10 A schematic diagram of the structure of the connection between the conversion operating portion and the hinge connection assembly provided by the present invention;

[0033] Figure 11 A schematic diagram of the installation process of the handle rotating part provided by the present invention;

[0034] Figure 12 This is a schematic diagram of the installation of the handle rotating part provided by the present invention;

[0035] Figure 13 An exploded view of the mobile device portion provided by the present invention;

[0036] Figure 14 A schematic cross-sectional view of a moving device portion provided by the present invention;

[0037] Figure 15 A schematic diagram of the structure of the connection between the wheel module button and the second coupling groove provided by the present invention;

[0038] Figure 16 A schematic structural diagram of the first and second coupling grooves provided by the present invention;

[0039] Figure 17 A schematic diagram of the wheel module installation structure provided by the present invention;

[0040] Figure 18 A schematic structural diagram of the rubber cap provided by the present invention being installed in the third coupling groove;

[0041] Figure 19 A schematic diagram of the internal structure of the rubber cap provided by the present invention installed in the third combining groove;

[0042] Figure 20 A schematic structural diagram of the rubber cap provided by the present invention;

[0043] Figure 21 A side view of the installation of the anti-collision portion provided by the present invention;

[0044] Figure 22 This is a top view of the installation of the anti-collision part provided by the present invention.

[0045] Among them: 21 is the front frame; 22 is the rubber seal; 23 is the rear frame; 30 is the hinge; 40 is the handle; 50 is the first support frame; 51 is the second support frame; 61 is the first locking device; 62 is the second locking device; 100 is the rotating luggage body; 110 is the front chamber; 120 is the rear chamber; 111 is the first coupling groove; 121 is the second coupling groove; 122 is the third coupling groove; 123 is the rubber cap; 130 is the handle; 131 is the handle rotating part; 131a is the hinge connection component; 131b is the hinge fixing component; 131c is the rotation spring; 131d is the moving pin; 131 e is a conversion guide; 131f is a rotating part cover; 132 is an inner handle tube; 133 is an outer handle tube; 134 is a gripping part; 134a is an extension button; 135 is a conversion operating part; 135a is a conversion handle; 135b is a conversion handle pin; 135c is a conversion line; 140 is a moving device part; 141 is a wheel; 142 is a wheel module; 142a is a wheel module button; 142b is a wheel module spring; 142c is a wheel module pin; 142d is a pin fixing part; 143 is an axis contact part; 144 is a wheel outer cover; 150 is an anti-collision part; 151 is a first buffer part; 152 is a second buffer part. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] See also Figures 1-22 The embodiment of the present invention discloses a rotating luggage box, comprising:

[0048] The front chamber 110 and the rear chamber 120 are hingedly adapted to one end of the front chamber 110. The bottoms of the front chamber 110 and the rear chamber 120 are respectively provided with two first coupling grooves 111 and a second coupling groove 121. The side of the rear chamber 120 away from the front chamber 110 is provided with a plurality of third coupling grooves 122. The front chamber 110 and the rear chamber 120 are combined with each other to enclose a storage space.

[0049] The handle portion 130 is connected to the rear chamber 120 and includes a handle rotating portion 131 and a gripping portion 134. The handle rotating portion 131 is arranged at the lower end of the rear chamber 120 away from the front chamber 110. The handle rotating portion 131 is hinged to the rear chamber 120 by a hinge 30. The gripping portion 134 is connected to the end of the handle rotating portion 131 away from the rear chamber 120. The gripping portion 134 is arranged in a T-shape and is provided with an extension button 134a. By setting the handle rotating portion 131 to be hinged to the rear chamber 120 by the hinge 30, the user can rotate or fix the handle portion 130 at a specific angle. The gripping portion 134 can be extended to facilitate the user to adjust the length as needed. By rotating and fixing the handle portion 130, the conversion between the trolley mode and the trolley mode can be achieved.

[0050] The mobile device part 140 is provided in plurality, and the plurality of mobile device parts 140 are detachably provided in the first coupling groove 111, the second coupling groove 121 and the third coupling groove 122; by providing the mobile device part 140, the mobile device part 140 can be smoothly moved on the ground, thereby improving the user's mobility convenience.

[0051] In this embodiment, a recessed receiving portion is provided on the side of the rear chamber 120 away from the front chamber 110, which maintains the overall appearance of the rotating luggage case body 100 while taking into account the operability of the user; the handle portion 130 is provided in the receiving portion, and the handle portion 130 also includes an inner handle tube 132 and an outer handle tube 133. The inner handle tube 132 is telescopically provided in the outer handle tube 133 along the length direction, and the grip portion 134 is connected to the end of the inner handle tube 132 away from the outer handle tube 133, and the end of the outer handle tube 133 away from the inner handle tube 132 is connected to the handle rotating portion 131.

[0052] In this embodiment, the handle rotating part 131 includes a hinge connection component 131b, a conversion guide 131e and a rotation part cover 131f. The hinge connection component 131b is arranged in the accommodating part, and the outer handle tube 133 is hinged to the rear chamber 120 through the hinge connection component 131b. The conversion guide 131e is rotatably connected to the hinge connection component 131b. A guide groove is provided on the conversion guide 131e, and the guide groove contacts the outer handle tube 133. The conversion guide 131e is provided with a first guide groove and a second guide groove, and the rotation range of the hinge connection component 131b is limited by the first guide groove and the second guide groove; the rotation part cover 131f is mounted on the hinge connection component 131b; when the user operates the conversion handle 135a, the conversion line 135c moves, so that the conversion handle pin 135b and the moving pin 131d can rise or fall; at this time, the movement of the moving pin 131d can be guided by the conversion guide 131e of the handle rotating part 131.

[0053] In this embodiment, the hinge connection assembly 131b includes a hinge fixing component 131b, a movable pin 131d and a rotation spring 131c. The hinge fixing component 131b is sleeved on the bottom of the outer handle tube 133, the rotating part cover 131f is sleeved on the hinge fixing component 131b, the movable pin 131d passes through and fixes the rotating part cover 131f, the hinge fixing component 131b and the outer handle tube 133, the conversion guide 131e is rotatably set on the hinge fixing component 131b through the movable pin 131d, and the rotation spring 131c is set between the movable pin 131d and the hinge fixing component 131b.

[0054] In this embodiment, a conversion operating part 135 is provided on the outer handle tube 133, and the conversion operating part 135 includes a conversion handle 135a and a conversion handle pin 135b. The conversion handle 135a is set at one end of the outer handle tube 133 close to the inner handle tube 132. The conversion handle 135a is movably set on the outer handle tube 133 through the conversion handle pin 135b. The conversion handle pin 135b is connected to the conversion guide 131e through the conversion line 135c; when the user operates the conversion handle 135a, the conversion line 135c moves, so that the conversion handle pin 135b and the movable pin 131d can rise or fall; at this time, the movement of the movable pin 131d can be guided according to the conversion guide 131e of the handle rotating part 131.

[0055] In this embodiment, the mobile device part 140 includes a wheel 141 and a wheel module 142. The wheel 141 is provided with an axis contact part 143. The wheel module 142 is set on the wheel 141 through the axis contact part 143. The wheel 141 is set in the first coupling groove 111, the second coupling groove 121 and the third coupling groove 122 so that it can rotate 360 ​​degrees through the wheel module 142.

[0056] In this embodiment, the wheel module 142 includes a wheel module button 142a and a wheel module pin 142c, one end of the wheel module button 142a is adapted to the shaft contact portion 143, and the other end of the wheel module button 142a is adapted to the first coupling groove 111, the second coupling groove 121 and the third coupling groove 122, two wheel module pins 142c are arranged horizontally at intervals, and the two wheel module pins 142c are arranged in the wheel module button 142a and can be moved in the vertical direction through the pin fixing component 142d, the two wheel module pins 142c are adapted to the shaft contact portion 143, and a wheel module spring 142b is provided on the wheel module button 142a; the shaft contact portion 143 of 141 is formed by metal insert injection molding, so that it can be constructed to ensure durability and rotational force at the same time.

[0057] Specific usage process

[0058] The switching operation unit 135 can be used to switch between the suitcase mode and the trolley mode:

[0059] In the trolley mode, the handle portion 130 can be extended in the vertical direction, so that the user can hold the grip portion 134 and move like a suitcase;

[0060] In the state where the conversion operation portion 135 is not operated, the moving pin 131d is seated in the first guide groove of the conversion guide 131e and remains in a fixed state, so that the user can stably pull the trolley;

[0061] At this time, the moving device portion 140 is seated in the first and second combination grooves 111 and 121 at the bottom of the front and rear chambers 110 and 120;

[0062] In order to convert from the trolley mode to the stroller mode, the user can operate the conversion grip 135a of the conversion operation portion 135, so that the moving pin 131d is disengaged from the first guide groove of the conversion guide 131e;

[0063] When the moving pin 131d is disengaged from the first guide groove of the conversion guide 131e, the moving pin 131d can move along the conversion guide 131e between the first and second guide grooves;

[0064] That is, when the rotation of the handle rotating portion 131 exceeds a certain angular range, the moving pin 131d is seated in the second guide groove of the conversion guide 131e and remains in a fixed state unless the conversion operation portion 135 is operated again, so that the user can stably pull the trolley;

[0065] When the user presses the wheel module button 142a, i.e., applies a certain pressure to the wheel module button 142a, the wheel module spring 142b installed inside is compressed, and thus the wheel module pin 142c fixed to the pin fixing member 142d is released; thus, the wheel 141 can be separated from the wheel module 142;

[0066] At this time, the moving device portion 140 is moved to be seated in the third combination groove 122 of the rear chamber 120 side wall.

[0067] In addition, in the present embodiment, the front frame 21 is provided on the front chamber 110, and the rear frame 23 is included in the rear chamber 120 to secure the structural rigidity, and the front chamber 110 and the rear chamber 120 are combined by the front frame 21 and the rear frame 23;

[0068] A rubber seal 22 for securing the sealing property is provided between the front frame 21 and the front chamber 110, and the rear frame 23 and the rear chamber 120, and the waterproof and dustproof effects are improved by the rubber seal 22;

[0069] The front frame 21 and the rear frame 23 are made of an aluminum alloy, stainless steel, or a composite material having high durability.

[0070] The rotating suitcase body 100 is also provided with a hinge 30, a handle 40, a first support frame 50 and a second support frame 51. The hinge 30 serves to connect the front chamber 110 and the rear chamber 120, thereby firmly combining the two chambers. The hinge 30 is made of metal or high-strength synthetic material and can be fastened by rivets, bolts, welding or bonding. The handle 40 is provided on the upper surface of the rear chamber 120 to facilitate the user to use when lifting or moving the convertible suitcase 100. The first support frame 50 and the second support frame 51 are provided inside the rear chamber 120 to ensure structural rigidity. The first support frame 50 and the second support frame 51 are made of aluminum alloy, stainless steel or carbon fiber composite material, and can be configured according to the internal structure of the rear chamber 120 to enhance overall durability.

[0071] The rotating luggage case body 100 further includes a first locking device 61 and a second locking device 62 to maintain the connection between the front chamber 110 and the rear chamber 120 to maintain the security of the storage space inside the front chamber 110 and the rear chamber 120. The locking method can be mechanical locking, electronic locking or magnetic locking.

[0072] The rotating luggage case body 100 further includes an anti-collision portion 150 for protecting against external impacts. The anti-collision portion 150 includes a first buffer member 151 and a second buffer member 152. The first buffer member 151 is disposed on the side surface opposite to the first locking device 61 where the front chamber 110 is disposed, and the second buffer member is disposed on the same side surface corresponding to the first buffer member 151. The first buffer member 151 and the second buffer member 152 protect the side surface edges of the entire rotating luggage case body 100.

[0073] The anti-collision portion 150 is made of a material for absorbing shock, such as ethylene vinyl acetate, thermoplastic polyurethane, silicone, or synthetic rubber, and can effectively disperse external shock, thereby preventing damage to the rotating trunk body 100.

[0074] The first buffer member 151 and the second buffer member 152 can be firmly coupled to the outside of the front chamber 110 and the outside of the rear chamber 120 by means of fastening tools such as rivets, screws, and snaps;

[0075] In order to realize the conversion between the trolley mode and the cart mode and facilitate the removal of the moving device portion 140, the anti-collision portion 150 plays the role of fixing the rotating luggage body 100 on the ground;

[0076] When the curvatures or shapes of the current chamber 110 and the rear chamber 120 are configured to be different from each other, in order to maintain the level with the ground, the first and second buffer members 151 and 152 having different heights can be used; the buffer members having different heights from each other can enable the trolley case to maintain the level with the ground when the trolley case is in the trolley mode or the handcart mode, thereby providing the self-standing property and balance, and especially, when the moving device 140 is removed or disposed at an unbalanced position, the auxiliary function can also be performed, so that the placement can be achieved without inclination;

[0077] Thus, the user can stably park or carry the trolley case regardless of the external environment, and the provision of the anti-collision part 150 can help to improve the safety and durability when actually used.

[0078] The various embodiments are described in the specification by way of progression, each building on the last to facilitate ease of understanding. The same reference numerals are used throughout the drawings and like structure are denoted with like reference numerals. Each embodiment is directed to a different embodiment of the device disclosed in the specification, and each embodiment focuses on the differences between the embodiments disclosed in the specification. The same parts of the embodiments are referred to each other.

[0079] The above description of disclosed embodiments provides enough information to enable one of ordinary skill in the art to practice or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotating luggage box, characterized in that: include: A front chamber and a rear chamber, wherein the rear chamber is hingedly adapted to one end of the front chamber, two first coupling grooves and a second coupling groove are respectively provided on the bottoms of the front chamber and the rear chamber, and a plurality of third coupling grooves are provided on a side of the rear chamber away from the front chamber; a handle portion, the handle portion being connected to the rear chamber, the handle portion comprising a handle rotating portion and a gripping portion, the handle rotating portion being arranged at the lower end of the rear chamber away from the front chamber, the handle rotating portion being hinged to the rear chamber via a hinge, the gripping portion being connected to the end of the handle rotating portion away from the rear chamber, the gripping portion being arranged in a T-shape, and having an extension button provided on the gripping portion; The moving device part is provided in plurality, and the plurality of the moving device parts are detachably provided in the first combining slot, the second combining slot and the third combining slot.

2. The rotating luggage case according to claim 1, characterized in that: A recessed accommodating portion is provided on the side of the rear chamber away from the front chamber, and the handle portion is provided in the accommodating portion. The handle portion further comprises an inner handle tube and an outer handle tube, and the inner handle tube is telescopically provided in the outer handle tube along the length direction. The gripping portion is connected to one end of the inner handle tube away from the outer handle tube, and one end of the outer handle tube away from the inner handle tube is connected to the handle rotating portion.

3. The rotating luggage case according to claim 2, characterized in that: The handle rotating part includes a hinge connection assembly, a conversion guide and a rotating part cover. The hinge connection assembly is arranged in the accommodating part, and the outer handle tube is hinged to the rear chamber through the hinge connection assembly. The conversion guide is rotatably connected to the hinge connection assembly. The conversion guide is provided with a guide groove, and the guide groove is in contact with the outer handle tube. The rotation range of the hinge connection assembly is limited by the guide groove. The rotating part cover is sleeved on the hinge connection assembly.

4. The rotating luggage case according to claim 3, characterized in that: The hinge connection assembly includes a hinge fixing component, a movable pin and a rotation spring. The hinge fixing component is sleeved on the bottom of the outer handle tube, the rotating part cover is sleeved on the hinge fixing component, the movable pin passes through and fixes the rotating part cover, the hinge fixing component and the outer handle tube, the conversion guide is rotatably set on the hinge fixing component through the movable pin, and the rotation spring is set between the movable pin and the hinge fixing component.

5. The rotating luggage case according to claim 4, characterized in that: The outer handle tube is provided with a conversion operating part, which includes a conversion handle and a conversion handle pin. The conversion handle is provided on one end of the outer handle tube close to the inner handle tube. The conversion handle is movably provided on the outer handle tube through the conversion handle pin. The conversion handle pin is connected to the conversion guide through a conversion line.

6. The rotating luggage case according to claim 1, characterized in that: The mobile device portion includes a wheel and a wheel module, the wheel is provided with an axis contact portion, the wheel module is arranged on the wheel through the axis contact portion, and the wheel is arranged in the first, second and third coupling grooves so as to be rotatable 360 ​​degrees through the wheel module.

7. The rotating luggage case according to claim 6, characterized in that: The wheel module includes a wheel module button and a wheel module pin, one end of the wheel module button is adapted to the shaft contact portion, and the other end of the wheel module button is adapted to the first combining groove, the second combining groove and the third combining groove. Two wheel module pins are arranged horizontally at intervals, and the two wheel module pins are vertically movably arranged in the wheel module button through a pin fixing component. The two wheel module pins are adapted to the shaft contact portion, and a wheel module spring is provided on the wheel module button.

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