Thumb structure of toy manipulator

Abstract

The utility model provides a thumb structure of a toy manipulator, which comprises a mounting seat, a knuckle component and a driving component used for driving the knuckle component to bend or unbend, the mounting seat comprises a mounting plate, a mounting box and a mounting frame, and the mounting plate is provided with a connecting part detachably connected to the toy manipulator; the mounting box is fixed on the mounting plate and rotationally connected with the mounting frame, a first clutch piece is fixed on the mounting box, a second clutch piece is fixed on the mounting frame, and the first clutch piece and the second clutch piece have a first connection state capable of being relatively fixed and a second connection state capable of being relatively rotated; the knuckle assembly and the driving assembly are rotationally connected to the mounting frame. The thumb structure can present the action that the thumb turns inwards or outwards in the rotating process of the mounting frame, so that the flexibility and the bionic characteristic of the thumb are improved, the swing angle between the thumb structure and the mounting frame is stable, and deflection is not prone to occurring to change the relative position.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field at toy, especially a thumb structure of toy mechanical hand. BACKGROUND

[0002] In the prior art, a toy mechanical hand with a modular structure is provided in Chinese patent CN217187882U, which is convenient to assemble and has good finger control effect. However, the structure for forming the thumb in the finger module can realize bending and straightening actions, but cannot realize the inward or outward turning action of the thumb, resulting in poor flexibility of the thumb and weak bionic characteristics, and the playability and interestingness of the toy mechanical hand cannot be further improved. SUMMARY

[0003] The utility model aims at providing a thumb structure of toy mechanical hand to solve the problem that the thumb structure of the toy mechanical hand cannot realize the inward and outward turning action in the existing structure, resulting in poor flexibility of the thumb.

[0004] To achieve the above purpose, the utility model provides a thumb structure of toy mechanical hand, which comprises a mounting seat, a knuckle assembly, and a driving assembly for driving the knuckle assembly to bend or straighten. The mounting seat comprises a mounting plate, a mounting box, and a mounting frame. The mounting plate is provided with a connecting part that can be detachably connected to the toy mechanical hand. The mounting box is fixed to the mounting plate and rotationally connected to the mounting frame. The mounting box is fixed with a first clutch, and the mounting frame is fixed with a second clutch. The first clutch and the second clutch have a first connection state that can be relatively fixed and a second connection state that can be relatively rotated. The mounting frame is rotationally connected with the knuckle assembly and the driving assembly.

[0005] As a preferred scheme, a gear ring is formed in the second clutch, the first clutch is rotationally fitted in the gear ring, an elastic movable strip is arranged on the first clutch, and a protrusion is arranged on the elastic movable strip and can be fixedly engaged with the gear groove of the gear ring.

[0006] As a preferred solution, the first clutch or the second clutch is connected to the rotating shaft of the mounting box through an elastic member in an axially movable manner, one side of the first clutch is provided with a first tooth surface relative to the second clutch, the second clutch is provided with a second tooth surface capable of being clamped and fixed with the first tooth surface, or a gasket is arranged between the first clutch and the second clutch in a pressing manner, and the gasket is used to provide a friction force.

[0007] As a preferred solution, a receiving slot hole is arranged through the mounting box, a fixing hole is arranged in the mounting plate corresponding to the receiving slot hole, the mounting box and the mounting plate are detachably connected through a rotating shaft, and the rotating shaft can pass through the fixing hole and the receiving slot hole and be clamped and fixed on the hole wall of the receiving slot hole in a rotating manner.

[0008] As a preferred solution, an electric control assembly is arranged in the mounting box, the electric control assembly comprises a motor, a driving shaft fixed in a circumferential direction of the first clutch, and a transmission gear set in transmission connection between the motor and the driving shaft.

[0009] As a preferred solution, the electric control assembly further comprises a conductive connector electrically connected with the motor, a mounting slot hole is arranged through the mounting box for fixing the conductive connector, a through hole is arranged in the mounting plate corresponding to the mounting slot hole, and the mounting slot hole is inserted and connected in the through hole, so that the conductive connector can be exposed outside the mounting plate.

[0010] As a preferred solution, the driving assembly comprises a piston cylinder mounted on the mounting frame and a connecting rod set mounted in the knuckle assembly, the connecting rod set comprises a first connecting rod rotatably connected to the mounting frame and a second connecting rod rotatably connected to the first connecting rod.

[0011] As a preferred solution, the knuckle assembly comprises a first knuckle, a second knuckle and a third knuckle connected in sequence, the first knuckle is rotatably connected to the mounting frame and rotatably connected to a piston rod of the piston cylinder, the second knuckle is fixed to the first connecting rod, and the third knuckle is fixed to the second connecting rod.

[0012] As a preferred solution, the mounting frame is provided with a first mounting clamping position and a second mounting clamping position, the first mounting clamping position is provided with a clamping shaft, the clamping shaft is detachably connected with the piston cylinder, the second mounting clamping position comprises two spaced positioning plates, a positioning block is detachably connected between the two positioning plates through a locking shaft, and the knuckle assembly and the first connecting rod are rotatably connected to the positioning block, respectively.

[0013] As a preferred embodiment, the connecting part includes a hook plate and a U-shaped plate disposed opposite to each other on both ends of the mounting plate. The mounting plate and the U-shaped plate can be adapted to be inserted into the mounting groove of the toy robot, so that the hook plate can be fastened to the groove wall of the mounting groove.

[0014] Therefore, based on the technical means of this utility model, the effects that this utility model can achieve are briefly described as follows: The thumb structure of the toy robotic hand provided by this utility model divides the mounting base into a mounting plate, a mounting box, and a mounting frame. The mounting plate can be detachably connected to the toy robotic hand through a connecting part to retain the assembleability of the thumb structure and satisfy the player's assembly fun. The mounting box is fixed to the mounting plate and rotatably connected to the mounting frame. The mounting box and the mounting frame are also connected relatively fixedly and relatively rotatably through a first clutch and a second clutch. The above structural configuration allows the thumb structure to be driven by an electric structure to rotate the mounting frame, or it can be driven manually to rotate the mounting frame. Moreover, it can make the swing angle between the mounting box and the mounting frame relatively stable and not easily deflected, changing their relative positions. The mounting frame is connected to a knuckle assembly and a drive assembly, so that during the rotation of the mounting frame, the thumb can exhibit an inward or outward flipping motion, thereby improving the flexibility and bionic characteristics of the thumb, and further improving the playability and fun of the toy robotic hand. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the thumb structure according to one embodiment of the present invention.

[0016] Figure 2 for Figure 1 A schematic diagram showing the rotation of the mounting bracket relative to the mounting box.

[0017] Figure 3 for Figure 2 A schematic diagram of the middle drive component driving the bending of the knuckle component.

[0018] Figure 4 for Figure 1 A schematic diagram of the structure of the middle thumb.

[0019] Figure 5 for Figure 4 Exploded view of the mounting bracket.

[0020] Figure 6 for Figure 2 A cross-sectional view of the mounting base.

[0021] Figure 7 for Figure 1 A cross-sectional view of the middle thumb structure.

[0022] Figure 8 for Figure 3Internal view of the middle thumb structure.

[0023] Figure 9 The exploded view of the mounting base of another embodiment of the utility model.

[0024] Figure 10 For Figure 9 The cross-sectional view of the mounting base.

[0025] In the figure: 100 - mounting base; 110 - mounting plate; 111 - hook plate; 112 - U-shaped plate; 113 - groove; 114 - through hole; 115 - clamping groove; 116 - fixing hole; 120 - mounting box; 121 - electric control assembly; 1211 - conductive connector; 1212 - motor; 1213 - drive shaft; 1214 - transmission gear set; 122 - mounting slot hole; 123 - rotating shaft; 124 - fixing column; 125 - receiving slot hole; 130 - mounting frame; 131 - first mounting clamping position; 1311 - clamping shaft; 132 - second mounting clamping position; 1321 - positioning plate; 133 - positioning block; 134 - locking shaft; 135 - decorative cover; 140 - first clutch; 141 - first tooth surface; 142 - elastic movable strip; 143 - protruding block; 150 - second clutch; 151 - second tooth surface; 152 - gear ring; 160 - elastic member; 170 - limiting member; 180 - screwing shaft; 200 - knuckle assembly; 210 - first knuckle; 220 - second knuckle; 230 - third knuckle; 300 - driving assembly; 310 - piston cylinder; 311 - piston rod; 320 - connecting rod set; 321 - first connecting rod; 322 - second connecting rod. DETAILED DESCRIPTION

[0026] The preferred embodiments of the utility model will be further described in detail below with reference to the drawings.

[0027] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0028] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features.

[0030] In the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless otherwise expressly specified and limited, the "upper" or "lower" of the first feature in the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include the vertical and inclined upper of the first feature in the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include the vertical and inclined lower of the first feature in the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0032] Please refer to Figures 1 to 8 The embodiment provides a thumb structure of a toy manipulator, which comprises a mounting seat 100, a knuckle assembly 200 connected to the mounting seat 100, and a driving assembly 300 for driving the knuckle assembly 200 to bend or straighten.

[0033] The mounting seat 100 comprises a mounting plate 110, a mounting box 120 and a mounting frame 130. The mounting plate 110 is detachably connected to the mounting groove of the toy robot hand through a connecting portion, so that the thumb structure has the splicing property to meet the splicing fun of the player. The mounting box 120 is fixed on the mounting plate 110 and rotationally connected with the mounting frame 130. The mounting frame 130 is rotationally connected with the knuckle assembly 200 and the driving assembly 300. When the mounting frame 130 rotates left and right relative to the mounting box 120, the knuckle assembly 200 and the driving assembly 300 can be driven to turn inwards or outwards, showing the action of the thumb turning inwards or outwards, so as to improve the flexibility and bionic characteristics of the thumb, and further improve the playability and interestingness of the toy robot hand.

[0034] In the embodiment, the connecting portion of the mounting plate 110 comprises a hook plate 111 and a U-shaped plate 112 oppositely arranged on both ends of the mounting plate 110. The mounting plate 110 and the U-shaped plate 112 can be adaptively inserted into the mounting groove of the toy robot hand, so that the hook plate 111 can be buckled and connected to the groove wall of the mounting groove. It can be understood that the structure of the connecting portion can ensure that the mounting plate 110 is tightly connected to the toy robot hand, and the connecting operation is also facilitated. Specifically, if it is necessary to fix the mounting plate 110 to the toy robot hand, the hook plate 111 is inserted into one end groove wall of the mounting groove and the mounting plate 110 is pressed, so that the U-shaped plate 112 is clamped in the mounting groove. If it is necessary to disassemble the mounting plate 110, the U-shaped plate 112 is lifted to separate the mounting plate 110 from the mounting groove, and then the hook plate 111 is pulled out of the groove wall of the mounting groove. In other embodiments of the utility model, the connecting portion can also be provided as other detachable structures, such as buckle structure, plug-in structure, magnetic attraction structure, etc.

[0035] In the embodiment, the mounting plate 110 is further provided with a groove 113 and a through hole 114. The groove 113 is located on one side of the mounting plate 110 relative to the mounting box 120, and is used for clamping part of the shell of the mounting box 120, so that the connection of the two is more stable. The through hole 114 is located in the groove 113 and is provided through the connecting plate 110. The mounting groove hole of the mounting box 120 is inserted and connected in the through hole 114, so that the conductive connector in the mounting box 120 can be exposed outside the mounting plate 110. When the mounting plate 110 is fixed on the toy robot hand, the conductive connector can be electrically connected to the control circuit of the toy robot hand, so as to electrically connect the electric control assembly in the mounting box 120. In other embodiments of the utility model, the mounting plate 110 can not be provided with the groove 113 and the through hole 114. The structure can be adjusted to other suitable structures according to the structure of the mounting box 120.

[0036] A first clutch 140 is fixed on the mounting box 120, and a second clutch 150 is fixed on the mounting bracket 130. The first clutch 140 and the second clutch 150 have a first connection state that can be relatively fixed and a second connection state that can be relatively rotatable. This structural arrangement allows the mounting box 120 to drive the first clutch 140 to rotate, thereby driving the second clutch 150 to rotate, and ultimately achieving the purpose of automatically rotating the mounting bracket 130 electrically. When the mounting box 120 drives the mounting bracket 130 to its limit position, because the first clutch 140 and the second clutch 150 have the second connection state, the first clutch 140 and the second clutch 150 change from the first connection state to the second connection state, ensuring that the electrical control components inside the mounting box 120 will not burn out due to jamming at the limit position. The above-mentioned structural design allows players to manually drive the mounting bracket 130 to rotate, and also makes the swing angle between the mounting box 120 and the mounting bracket 130 more stable, preventing them from deflecting and changing their relative positions, thus improving the gaming experience of the thumb mechanism.

[0037] It is understood that the mounting box 120 contains an electrical control assembly 121, which includes a conductive connector 1211, a motor 1212 electrically connected to the conductive connector 1211, a drive shaft 1213 circumferentially fixed to the first clutch 140, and a transmission gear set 1214 that drives the motor 1212 and the drive shaft 1213. The mounting box 120 has a through-hole 122 for fixing the conductive connector 1211, which is inserted into the through hole 114, allowing the conductive connector 1211 to be exposed outside the mounting plate 110. The transmission gear set 1214 is a multi-stage reduction gear set, used to reduce the speed at which the drive shaft 1213 rotates when the motor 1212 starts, thereby reducing the speed at which the first clutch 140 drives the second clutch 150 and the mounting bracket 130 to rotate, and improving operational stability.

[0038] The mounting bracket 130 is provided with a first mounting slot 131 and a second mounting slot 132. A piston cylinder of the drive assembly 300 is fitted and fixed within the first mounting slot 131, and a retaining shaft 1311 is provided on the first mounting slot 131, which is detachably connected to the piston cylinder. The second mounting slot 132 includes two spaced positioning plates 1321, and a positioning block 133 is detachably connected between the two positioning plates 1321 via a locking shaft 134. A knuckle assembly 200 and the drive assembly 300 are rotatably connected to the positioning block 133. Specifically, the locking shaft 134 can pass through the positioning plates 1321 and the positioning block 133 and rotate to lock the positioning block 133 between the two positioning plates 1321. In this embodiment, to improve the aesthetics of the positioning plate 1321 and prevent accidental rotation of the locking shaft 134 by the player, causing the positioning block 133 to separate from the positioning plate 1321, a decorative cover 135 is detachably inserted into the exterior of both positioning plates 1321. The decorative cover 135 covers both ends of the locking shaft 134, improving aesthetics and preventing accidental activation. In other embodiments of this utility model, the decorative cover 135 may not be provided on the two positioning plates 1321.

[0039] In this embodiment, the first clutch 140 is circumferentially fixed to the drive shaft 1213 by means of an elastic element 160 (such as a spring), which allows axial movement. The first clutch 140 has a first toothed surface 141 on one side opposite to the second clutch 150. The second clutch 150 has a second toothed surface 151 that can engage and be fixed with the first toothed surface 141, and the second clutch 150 is rotatably connected to the drive shaft 1213. It can be understood that the drive shaft 1213 forms the rotating shaft of the mounting box 120. At this time, a limiting element 170 is fixedly connected to the end of the drive shaft 1213, and the elastic element 160 is sleeved on the drive shaft 1213 with its two ends abutting against the limiting element 170 and the end of the first clutch 140, respectively. In other embodiments of this utility model, if the mounting box 120 does not contain an electrical control component 121, the rotating shaft of the mounting box 120 is fixedly mounted on the outer wall of the mounting box 120. In this case, the first clutch 140 is circumferentially fixed to the rotating shaft through the elastic member 160, and the second clutch 150 is rotatably connected to the rotating shaft.

[0040] It should be noted that the working principle of the first clutch 140 and the second clutch 150 provided in this embodiment is roughly as follows: if the motor 1212 is started to drive the drive shaft 1213 to rotate through the transmission gear set 1214, since the drive shaft 1213 is circumferentially fixed with the first clutch 140, the first tooth surface 141 and the second tooth surface 151 are in a first connection state of engagement and fixation when the mounting bracket 130 has not reached its limit position. At this time, the drive shaft 1213 can be controlled to turn left or right, and the second clutch 150 and the mounting bracket 130 can be driven to flip left and right through the first clutch 140 to achieve automatic rotation. When the mounting bracket 130 is at its extreme position on either side, it is restricted and cannot continue to rotate. At this time, the drive shaft 1213 is still controlled by the motor 1212 to continue rotating. Since the first clutch 140 is axially elastically connected to the drive shaft 1213, during continuous rotation, the first clutch 140 can be pushed by the second clutch 150 and the elastic element 160 to continuously reciprocate on the drive shaft 1213, so that the first tooth surface 141 can rotate relative to the second tooth surface 151, preventing the motor 1212 from burning out. If the player manually drives the mounting bracket 130 to rotate, the first clutch 140 is also axially elastically connected to the drive shaft 1213, so that the first clutch 140 can be pushed by the second clutch 150 and the elastic element 160 to reciprocate on the drive shaft 1213, thereby allowing the second tooth surface 151 to rotate relative to the first tooth surface 141 at a certain angle, so as to lock and fix the mounting bracket 130 at different swing angles.

[0041] It should be noted that in other embodiments of this utility model, the second clutch 150 can be axially movable to the drive shaft 1213 via the elastic member 160. In this case, the second clutch 150 is rotatably connected to the drive shaft 1213, while the first clutch 140 remains circumferentially fixed to the drive shaft 1213. The first clutch 140 and the second clutch 150 can be engaged and fixed without a toothed structure. A gasket can be pressed between the first clutch 140 and the second clutch 150 by the elastic member 160. The gasket provides frictional force, which allows the first clutch 140 to drive the second clutch 150 to rotate when the second clutch 150 is not under force. Furthermore, when the external force on the second clutch 150 is greater than the frictional force, the first clutch 140 and the second clutch 150 can rotate relative to each other. The first clutch 140 and the second clutch 150 may also adopt other clutch structures commonly used in the toy industry to achieve the same function as this utility model.

[0042] Please refer to Figure 9 and Figure 10The diagram shows the structure of the mounting base 100 in another embodiment of the present invention. The difference between this embodiment and the above embodiment is that the mounting box 120 shown in the other embodiment does not contain an electronic control component 121, and the specific structures of the mounting plate 110, the mounting box 120, the first clutch 140, and the second clutch 150 are also different from those in the above embodiment.

[0043] In another embodiment, the mounting box 120 has an open structure on one side relative to the mounting plate 110. In this case, the mounting plate 110 is recessed with a slot 115 that matches the shape of the opening of the mounting box 120. The slot 115 is used to insert and fix the opening end wall of the mounting box 120, so that the connection between the two is more stable.

[0044] In another embodiment, a rotating shaft 123 and a fixing post 124 are fixed to the outer wall of the mounting box 120. A first clutch 140 is circumferentially fixed to the rotating shaft 123, and the fixing post 124 is used to further fix the first clutch 140 to the mounting box 120.

[0045] In another embodiment, the mounting box 120 is further provided with a through-hole 125, and the mounting plate 110 has a fixing hole 116 corresponding to the through-hole 125. The mounting box 120 and the mounting plate 110 are detachably connected by a tightening shaft 180. Specifically, the tightening shaft 180 can pass through the fixing hole 116 and the through-hole 125 and be rotatably engaged with the wall of the through-hole 125. The above arrangement allows the mounting box 120 to be detachably connected to the mounting plate 110 with different connection structures, so that the thumb structure can be detachably connected to the toy robotic hand with different assembly and disassembly structures.

[0046] In another embodiment, a toothed ring 152 is provided in the second clutch 150, and a first clutch 140 is rotatably fitted in the toothed ring 152. The first clutch 140 is provided with an elastic movable strip 142, and the elastic movable strip 142 is provided with a protrusion 143 that can engage and fix with the tooth groove of the toothed ring 152.

[0047] It should be noted that the working principle of the first clutch 140 and the second clutch 150 provided in another embodiment is roughly as follows: if the mounting box 120 and the mounting bracket 130 are rotated relative to each other, the protrusion 143 can rotate between the tooth grooves of the gear ring 152 because the elastic movable strip 142 has the ability to move elastically, until the protrusion 143 engages and is fixed with one of the tooth grooves of the gear ring 152, thereby changing the swing angle between the mounting box 120 and the mounting bracket 130 and realizing manual rotation. In other embodiments of this utility model, if the mounting box 120 is provided with an electronic control component 121, the drive shaft 1213 forms the rotating shaft of the mounting box 120. In this case, the first clutch 140 is only circumferentially fixed on the drive shaft 1213. When the mounting bracket 130 is not at its limit position, the protrusion 143 is engaged with a certain tooth groove of the gear ring 152. At this time, the rotation of the drive shaft 1213 can drive the second clutch 150 and the mounting bracket 130 to rotate in the same direction through the first clutch 140, thus achieving automatic rotation. When the mounting bracket 130 is at the limit position on either side, the mounting bracket 130 is restricted and cannot continue to rotate. At this time, the drive shaft 1213 is still controlled by the motor 1212 to continue rotating. Since the elastic movable strip 142 has the ability to move elastically, the protrusion 143 can rotate between the tooth grooves of the gear ring 152, preventing the motor 1212 from burning out.

[0048] Please refer to the above again. Figures 1 to 8 In this embodiment, the knuckle assembly 200 includes a first knuckle 210, a second knuckle 220, and a third knuckle 230 rotatably connected in sequence. The first knuckle 210 is rotatably connected to the positioning block 133 and driven by the piston cylinder of the drive assembly 300, so that it is controlled to rotate on the positioning block 133 when the piston cylinder is activated. The second knuckle 220 is fixed to the first connecting rod of the drive assembly 300, so that it is controlled to rotate on the first knuckle 210 when the first knuckle 210 rotates. The third knuckle 230 is fixed to the second connecting rod of the drive assembly 300, so that it is controlled to rotate on the second knuckle 220 when the second knuckle 220 rotates. In other embodiments of this invention, the knuckle assembly 200 may only include the first knuckle 210 and the second knuckle 220 rotatably connected in sequence.

[0049] The drive assembly 300 includes a piston cylinder 310 held in the first mounting position 131 and a connecting rod assembly 320 installed within the knuckle assembly 200. In this embodiment, the piston rod 310 is a hydraulically driven piston cylinder. The cylinder body of the piston cylinder 310 is provided with a U-shaped buckle, which is detachably connected to the retaining shaft 1311 for detachably fixing the piston cylinder 310 in the first mounting position 131. The piston rod 311 of the piston cylinder 310 is rotatably connected to the first knuckle 210. The connecting rod assembly 320 includes a first connecting rod 321 rotatably connected to the positioning block 133 and a second connecting rod 322 rotatably connected to the first connecting rod 321. The first connecting rod 321 is fixed to the second knuckle 220, and the second connecting rod 322 is fixed to the third knuckle 230. The connecting rod assembly 320 is used to improve the stability and orientation of the rotation of the knuckle assembly 200, making the bending and straightening movements of the knuckle assembly 200 smoother and more powerful. In other embodiments of this utility model, the piston cylinder 310 may be a pneumatically driven piston cylinder. If the knuckle assembly 200 only has a first knuckle 210 and a second knuckle 220, then the connecting rod assembly 320 may only have a first connecting rod 321.

[0050] It should be noted that the working principle of the drive component 300 driving the knuckle component 200 to bend or straighten has been disclosed in the prior art, so it will not be described in detail here.

[0051] For clarity, certain features described in individual embodiments of the present invention may be used in combination in a single embodiment. Furthermore, various features of the present invention described in individual embodiments may also be used individually or in any suitable form in sub-combinations.

Claims

1. A thumb structure for a toy robotic hand, comprising a mounting base, a knuckle assembly, and a drive assembly for driving the knuckle assembly to bend or straighten, characterized in that, The mounting base includes a mounting plate, a mounting box, and a mounting frame. The mounting plate has a connecting part that is detachably connected to the toy robot. The mounting box is fixed to the mounting plate and rotatably connected to the mounting frame. A first clutch is fixed on the mounting box, and a second clutch is fixed on the mounting frame. The first clutch and the second clutch have a first connection state that can be relatively fixed and a second connection state that can be relatively rotatable. The knuckle assembly and the drive assembly are rotatably connected to the mounting frame.

2. The thumb structure of the toy robotic hand as described in claim 1, characterized in that, The second clutch has a toothed ring inside, and the first clutch is rotatably fitted inside the toothed ring. The first clutch has an elastic movable strip, and the elastic movable strip has a protrusion that can engage and fix with the tooth groove of the toothed ring.

3. The thumb structure of the toy robotic hand as described in claim 1, characterized in that, The first clutch or the second clutch is axially movable to the rotating shaft of the mounting box via an elastic element. The first clutch has a first toothed surface on one side relative to the second clutch, and the second clutch has a second toothed surface that can engage and fix with the first toothed surface. Alternatively, a gasket is pressed between the first clutch and the second clutch to provide friction force.

4. The thumb structure of the toy robotic hand as described in any one of claims 1-3, characterized in that, The mounting box has a through-hole for receiving, and the mounting plate has a fixing hole corresponding to the receiving hole. The mounting box and the mounting plate are detachably connected by a tightening shaft. The tightening shaft can pass through the fixing hole and the receiving hole and be rotatably engaged with the hole wall of the receiving hole.

5. The thumb structure of the toy robotic hand as described in any one of claims 1-3, characterized in that, The mounting box is equipped with an electronic control assembly, which includes a motor, a drive shaft circumferentially fixed to the first clutch, and a transmission gear set that drives the motor and the drive shaft.

6. The thumb structure of the toy robotic hand as described in claim 5, characterized in that, The electrical control assembly also includes a conductive connector electrically connected to the motor. The mounting box has a through mounting slot for fixing the conductive connector. The mounting plate has a through hole corresponding to the mounting slot, and the mounting slot is inserted into the through hole so that the conductive connector can be exposed outside the mounting plate.

7. The thumb structure of the toy robotic hand as described in claim 1, characterized in that, The drive assembly includes a piston cylinder mounted on the mounting bracket and a linkage assembly mounted within the knuckle assembly. The linkage assembly includes a first linkage rotatably connected to the mounting bracket and a second linkage rotatably connected to the first linkage.

8. The thumb structure of the toy robotic hand as described in claim 7, characterized in that, The knuckle assembly includes a first knuckle, a second knuckle, and a third knuckle that are rotatably connected in sequence. The first knuckle is rotatably connected to the mounting bracket and rotatably connected to the piston rod of the piston cylinder. The second knuckle is fixed to the first connecting rod, and the third knuckle is fixed to the second connecting rod.

9. The thumb structure of the toy robotic hand as described in claim 7, characterized in that, The mounting bracket is provided with a first mounting position and a second mounting position. The first mounting position is provided with a retaining shaft, which is detachably connected to the piston cylinder. The second mounting position includes two spaced positioning plates, and a positioning block is detachably connected between the two positioning plates by a locking shaft. The finger assembly and the first connecting rod are rotatably connected to the positioning block respectively.

10. The thumb structure of the toy robotic hand as described in claim 1, characterized in that, The connecting part includes a hook plate and a U-shaped plate disposed opposite to each other on both ends of the mounting plate. The mounting plate and the U-shaped plate can be adapted to be inserted into the mounting groove of the toy robot, so that the hook plate can be fastened to the groove wall of the mounting groove.

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