TWI554690B - Joint device - Google Patents

Description

Joint device

The present invention relates to a joint device, and more particularly to a joint device for use in an infant carrier.

The existing infant carrier is adapted to carry a baby and includes a basket body, a handle, and a joint device that rotatably connects the basket body and the handlebar. The handle can be locked in a deployed position relative to the basket body by the articulating device, wherein the distal end of the handle is remote from the basket body. When the handle is folded relative to the main body of the basket, the button of the joint device needs to be pressed frequently to unlock the handle, so that the handle can be rotated relative to the basket body to a folding position, and the distal end of the handle is adjacent to the basket body. The foregoing operation is required to be achieved by the user's hands, which is inconvenient for the user.

Accordingly, it is an object of the present invention to provide a joint device that overcomes the aforementioned disadvantages.

Therefore, the joint device of the present invention comprises: a first pivot seat, a second pivot seat, a snap member, an actuation mechanism and a restriction module. The first pivot seat includes at least one first primary cogging. The second pivot seat is connected to the first pivot seat, And including at least one second main tooth groove, and rotatable relative to the first pivot seat about a first axis. The second primary gullet is aligned with the first primary gullet in the direction of the first axis when the second pivot seat is in a deployed position relative to the first pivot seat. When the second pivot seat is moved away from the deployed position, the second primary gullet is not aligned with the first primary gullet. The engaging member has at least one main protruding tooth and is movable between the first pivoting seat and the second pivoting seat along the first axis. When the engaging member is in a locked position, the main protruding teeth of the engaging member engage the first main tooth groove and the second main tooth groove to prevent the second pivot seat from rotating relative to the first pivot seat. When the engaging member is in a release position, the primary male teeth of the engaging member engage the first primary gullet and disengage from the second primary gullet to allow the second pivot to rotate relative to the first pivot. The trigger mechanism is coupled to the engaging member, and the triggering mechanism is driven to move along the first shaft toward the first pivoting seat to drive the engaging member to move from the locking position to the unlocking position, so that the second pivoting seat can be away from the deployed position. The limiting module is configured to hold the engaging member in the unlocking position when the second pivoting seat is in the deployed position, and the engaging member is driven by the triggering mechanism to move from the locking position to the unlocking position, allowing the second pivoting seat to be opposite to the first pivot The seat rotates.

100‧‧‧ joint device

1‧‧‧The first pivot seat

1a‧‧·The main body of the basket

1b‧‧‧handle

1c‧‧‧ first opening

10‧‧‧First foot

11‧‧‧The first major cogging

12‧‧‧First auxiliary cogging

13‧‧‧First pivot

2‧‧‧Second pivot

2a‧‧‧Perforation

2b‧‧‧through hole

2c‧‧‧Second opening

2d‧‧‧Protruding

20‧‧‧second foot

21‧‧‧Second major cogging

22‧‧‧Second auxiliary cogging

23‧‧‧Second pivot

25‧‧‧ inside end

3‧‧‧Cards

3a‧‧‧Tongkong

3b‧‧‧ pivot hole

31‧‧‧Auxiliary teeth

32‧‧‧main convex teeth

33‧‧‧ Round body

4, 4', 4" ‧ ‧ limit module

41‧‧‧ activity hook

41’, 41”‧‧‧ activity blocks

41a”‧‧‧Long hole

412’‧‧‧stop vertical

413’‧‧‧ guidance page

42‧‧‧Fixed hook

42', 42" ‧ ‧ fixed slot

43’, 43”‧‧‧ Third elastic parts

5‧‧‧Touching mechanism

51‧‧‧ button

52‧‧‧Lamination

6‧‧‧First elastic parts

7‧‧‧Second elastic parts

A‧‧‧first axis

B‧‧‧Second axis

G‧‧‧ gap

Other features and advantages of the present invention will be apparent from the detailed description of the embodiments of the present invention, wherein: FIG. 1 is a perspective view of an infant carrier including a joint device of a first embodiment of the present invention. Figure 2 is a perspective view of the second pivot seat in an unfolded position; Figure 2 is another perspective view of the infant carrier, indicating that the second pivot seat is in a folded position; 3 is a perspective exploded view of a first embodiment; FIG. 4 is a perspective view of a second pivot seat of a first embodiment; FIG. 5 is a perspective view of a snap member of a first embodiment; A partial cross-sectional view of an embodiment illustrates the engaging member in a locked position; FIG. 7 is another partial cross-sectional view of the first embodiment, illustrating the engaging member in an unlocked position; FIG. 8 is a first embodiment a partial perspective view in which the second pivot seat is omitted; FIG. 9 is another partial perspective view of the first embodiment, wherein the second pivot seat and the engaging member are omitted; FIG. 10 is a second embodiment of the present invention. FIG. 11 is a partially exploded perspective view of the second embodiment; FIG. 12 is a partial cross-sectional view of a second embodiment illustrating a snap member in a locked position; FIG. 13 is a second embodiment FIG. 14 is an exploded perspective view showing a restriction module of the second embodiment; FIG. 15 is a partial cross-sectional view showing a second embodiment, illustrating the restriction mode The group keeps the engaging member in a release position; FIG. 16 is a Isometric view of the three embodiments described joint device according to the present invention; Figure 17 is a partial cross-sectional view of a third embodiment illustrating a snap member in a locked position; and Figure 18 is a partial cross-sectional view of a third embodiment illustrating the latch member retained in a latched position.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 1 and 2, an infant carrier comprises a basket body 1a, a handle 1b, and two joint devices 100 of the first embodiment of the invention, and the joint device 100 is rotatably coupled to the basket body 1a and the handlebar 1b.

Still further referring to FIG. 3 to FIG. 9 , the first embodiment includes a first pivot seat 1 , a second pivot seat 2 , a latching member 3 , a limiting module 4 , an actuation mechanism 5 , and a first elastic member. 6 and a second elastic member 7.

The first pivot base 1 has a first leg 10 disposed on the basket body 1a, and a first pivot 13 extending through the first axis A (see FIG. 6). The second pivot base 2 has a second leg 20 disposed on the handle 1b, and a second pivot 23 extending through the first axis A (see FIG. 6). The second pivot 23 is coupled and inserted in the first a pivot 13 is rotatable relative to the first pivot 13 about the first axis A such that the second pivot 2 is rotatable relative to the first pivot 1 about the first axis A in a deployed position (see FIG. 1) and Rotate between the folding position (see Figure 2). When the second pivot seat 2 is in the deployed position, the distal end portion of the handlebar 1b is away from the basket body 1a, and when the second pivot seat 2 is in the collapsed position, the distal end portion of the handlebar 1b is adjacent to the basket body 1a.

The first pivot seat 1 includes two in the direction perpendicular to the first axis A The first main gullet 11 opposite to each other and the plurality of first auxiliary gullets 12. The first main gullet 11 and the first auxiliary gullet 12 are angularly arranged about the first axis A.

The second pivot seat 2 includes two second main slots 21 that are opposite each other in the direction perpendicular to the first axis A, and a plurality of second auxiliary slots 22. The second main gullet 21 and the second auxiliary gullet 12 are angularly arranged about the first axis A. When the second pivot 2 is in the deployed position, each of the second major slots 21 is aligned with the corresponding first major slot 11 in the direction of the first axis A. When the second pivot 2 is moved away from the deployed position, each of the second major slots 21 is not aligned with the corresponding first primary slot 11 in the direction of the first axis A. When the second pivot seat 2 is in the deployed position, each of the second auxiliary gullets 22 is aligned with the corresponding first auxiliary gullet 12 in the direction of the first axis A. When the second pivot 2 is moved away from the deployed position, each second auxiliary gullet 22 is not aligned with the corresponding first auxiliary gullet 12 in the direction of the first axis A. The second pivot seat 2 further includes a plurality of perforations 2a and a plurality of through holes 2b (see Fig. 4). In the present embodiment, the through holes 2a and the through holes 2b are alternately and angularly arranged around the first axis A.

The engaging member 3 has a circular body 33 centered on the first axis A, two main protruding teeth 32 opposed to each other in the direction perpendicular to the first axis A, and a plurality of auxiliary protruding teeth 31. The main protruding teeth 32 and the auxiliary protruding teeth 31 are provided on the outer circumference of the circular body 33.

The engaging member 3 is disposed to move between the first pivot seat 1 and the second pivot seat 2. The circular body 33 of the engaging member 3 forms a pivot hole 3b for the first pivot 13 of the first pivot seat 1 and the second pivot 23 of the second pivot seat 2 to extend. When the second pivot seat 2 is in the deployed position, the engaging member 3 can be along the first axis A in a lock Move between the fixed position (see Figure 6) and the release position (see Figure 7).

When the engaging member 3 is in the locking position, each of the main protruding teeth 32 of the engaging member 3 simultaneously engages with the corresponding first main tooth groove 11 and the second main tooth groove 21 which is aligned with the first main tooth groove 11. And each auxiliary convex tooth 31 of the engaging member 3 is also simultaneously engaged with the corresponding first auxiliary tooth groove 12 and the second auxiliary tooth groove 22 which is aligned with the first auxiliary tooth groove 12, so as to prevent the second pivot The seat 2 is rotated relative to the first pivot seat 1.

When the engaging member 3 is in a release position, each of the main protruding teeth 32 of the engaging member 3 is engaged with a corresponding one of the first main slots 11, and each of the main protruding teeth 32 is separated from the corresponding one of the second main portions. The tooth groove 21 allows the second pivot seat 2 to rotate relative to the first pivot seat 1, and each of the auxiliary convex teeth 31 of the engaging member 3 is engaged with the corresponding first auxiliary tooth groove 12, and is separated from the corresponding second main tooth groove twenty two. The size of each of the first auxiliary gullet 12 and the second auxiliary gullet 22 is smaller than the size of each of the main protruding teeth 32 of the engaging member 3 to avoid the main protruding teeth 32 when the second pivoting seat 2 leaves the deployed position. The second auxiliary gullet 22 is engaged.

The trigger mechanism 5 is movable along the first axis A and is rotatable together with the second pivot seat 2, and has a button 51 disposed on one side of the opposite pivoting member 3 of the second pivot seat 2, and a plurality of beadings 52, Each bead 52 extends from the periphery of the button 51 and passes through the corresponding perforation 2a in the direction of the first axis A. When the second pivoting seat 2 is in the deployed position, the button 51 of the triggering mechanism 5 can be pressed toward the first pivoting seat 1 to drive the bead 52 to push the engaging member 3, and the driving engaging member 3 is displaced from the locking position to the unlocking position. .

The first elastic members 6 are arranged along the first axis A and are respectively connected at both ends The first pivoting seat 1 and the engaging member 3 are connected to apply a biasing force to the engaging member 3 to move away from the first pivoting seat 1 toward the locking position. In the present embodiment, the first elastic member 6 is a compression spring.

The second elastic member 7 is along the first axis A and is respectively connected to the second pivot seat 2 and the trigger mechanism 5 for applying the remote sensing member 5 away from the engaging member 3 to return to the button 51 when the button 51 of the trigger mechanism 5 is released. The bias of the initial position. In the present embodiment, the second elastic member 7 is a compression spring.

The restriction module 4 includes a plurality of movable hooks 41 in the shape of a barb and a plurality of fixing hooks 42 in the shape of a barb. The fixing hook 42 is fixedly connected to the outer ring surface of the first pivot shaft 13 of the first pivot seat 1. Each of the movable hooks 41 is extended by the periphery of the button 51 of the touch mechanism 5 and passes through the corresponding through hole 2b in the direction of the first axis A.

When the second pivot seat 2 is in the deployed position, the movable hooks 41 respectively correspond to the fixed hooks 42 at an angular position with respect to the first axis A, and when the engaging members 3 are in the locked position, the movable hooks 41 is spaced along the first axis A from the fixed hooks 42. When the button 51 of the trigger mechanism 5 is pressed toward the first pivoting seat 1 to drive the engaging member 3 to be displaced from the locking position to the unlocking position, the button 51 simultaneously drives the movable hook 41 to move toward the first pivoting seat 1 to respectively The fixing hooks 42 are engaged, so that the actuation mechanism 5 and the movable hook 41 are prevented from being away from the first pivoting seat 1. The engagement of the movable hook 41 and the fixed hook 42 is such that when the second pivoting seat 2 is in the deployed position and the triggering mechanism 5 is pressed When released, the engaging member 3 can be held in the unlocked position to allow the second pivoting seat 2 to rotate relative to the first pivoting seat 1. The engaging member 3 also forms a plurality of through holes 3a communicating with the pivot holes 3b for respectively receiving the corresponding engaging members 3 when they are in the unlocking position. Fix the hook 42.

When the second pivoting seat 2 is rotated away from the first pivoting seat 1 and away from the deployed position, each movable hook 41 is not aligned with the corresponding fixed hook 42 in the direction of the first axis A, and then the corresponding fixing hook 42 is released to release the engaging component. 3. At this time, the engaging member 3 is pushed up by the first elastic member 6 against the second pivot seat 2, and does not move to the lock because the first main gullet 11 and the second main gullet 12 are not aligned. The position; the trigger mechanism 5 is pushed by the second elastic member 7 away from the first pivot seat 1 to return to its original position, so that the movable hook 41 is separated from the fixed hook 42 along the first axis A. When the second pivot seat 2 is rotated back to the deployed position, the movable hook 41 cannot be engaged with the fixed hook 42 so that the engaging member 3 cannot be held in the unlocked position, and the engaging member 3 is pushed by the first elastic member 6 to the locked position. .

According to the above, when the second pivoting seat 2 is in the deployed position, the engaging member 3 is moved from the locking position to the unlocking position by a single pressing operation of the triggering mechanism 5, and the engaging member 3 is supported by the limiting module 4 Positioned in the unlocked position to allow the second pivot seat 2 to rotate relative to the first pivot seat 1. 1 and 2, in the present invention, during the folding operation of the handle 1b with respect to the basket main body 1a, the actuation mechanism 5 of one of the joint devices 100 is pressed to drive the engaging member 3 to be held in the unlocking position, and The actuation mechanism 5 of one joint device 100 is subsequently pressed to drive the engagement member 3 of the other joint device 100 to remain in the unlocked position. Then, the handle 1b can be rotated relative to the basket main body 1a to the folding position. The aforementioned folding operation can achieve the user's operation with only one hand, and is more convenient to use than the conventional infant carrier.

Referring to Figures 10 to 15, a second implementation of the joint device 100 For example, it is substantially the same as the first embodiment. The difference is that the restriction module 4' of the second embodiment includes a fixing groove 42', a movable block 41' and a third elastic member 43'.

The fixing groove 42' is formed in the main protruding tooth 32 of one of the engaging members 3.

The movable block 41' is disposed on the second pivot base 2 and is movable relative to the second pivot base 2 along the second axis B (see Fig. 12) of the second pivot base 2, the second axis B being staggered with respect to the first axis A.

The third elastic members 43' are arranged along the second axis B, and are respectively connected to the movable block 41' and the second pivot base 2 for applying a biasing force to the movable block 41' toward the movement of the engaging member 3. In the present embodiment, the third elastic member 43' is a compression spring.

When the second pivot seat 2 is in the deployed position and the engaging member 3 is in the unlocking position (see FIG. 13), the fixing groove 42' is aligned with the second shaft B, so that the movable block 41' can be offset by the third elastic member 43' Engaging with the fixing groove 42' to hold the engaging member 3 in the unlocking position when the engaging member 3 is driven by the triggering mechanism 5 to move from the locking position to the unlocking position, allowing the second pivoting seat 2 to be opposite to the first pivoting seat 1 Turn.

The first pivoting seat 1 further includes a first opening 1c in which the engaging member 3 is located in the unlocking position and aligned with the fixing groove 42'. The second pivot base 2 further includes a second opening 2c for the movable block 41' to extend into.

The first pivot seat 1 has a groove defining surface defining a first opening 1c, and the movable block 41' has a guiding face 413'. The guiding jaw surface 413' slidably contacts the first pivoting seat 1 whereby the second pivoting seat 2 leaves the unfolding position The timed movable block 41' is pushed away from the fixing groove 42' by the groove defining surface to release the engaging member 3.

The movable block 41' also has a stop vertical surface 412' for contacting the groove defining surface when the second pivot seat 2 is in the deployed position to limit the angle of rotation of the second pivot seat 2 relative to the first pivot seat 1.

Referring to Figure 13, it is noted that when the engaging member 3 is in the unlocking position and the second pivoting seat 2 is in the deployed position, a gap G is formed between the engaging member 3 and the inner end surface 25 of the second pivoting seat 2. Therefore, when the second pivoting seat 2 is away from the deployed position, the engaging member 3 is released from the fixed position module 4' and is moved by the first elastic member 6 to move to an intermediate position, and the engaging member 3 is abutted at the intermediate position. Relying on the inner end surface 25 of the second pivot seat 2, and since the first main gullet 11 and the second main gullet 12 are not aligned, they do not move to the locked position, and the fixing groove 42' is not aligned with the first opening 1c (that is, when the second pivot seat 2 is in the deployed position, the fixing groove 42' is not aligned with the second shaft B); thereby, when the second pivot seat 2 is rotated back to the deployed position, the movable block 41 cannot be fixed with the fixing groove 42' Engagement does not hold the engaging member 3 in the unlocking position, so that the engaging member 3 is pushed by the first elastic member 6 to return to the locked position.

Referring to Figures 16 through 18, a third embodiment of the joint device 100 is substantially identical to the second embodiment. The restriction module 4" of the third embodiment also includes a fixing groove 42", a movable block 41" and a third elastic member 43". The difference is that the movable block 41" of the restriction module 4" includes an elongated hole 41a" extending along the second axis B. The second pivotal seat 2 also has a projection 2d disposed in the elongated hole 41a". The third elastic member 43" is positioned in the long hole 41a" and is connected to the movable block 41" and the protruding portion 2d, respectively, to the movable block 41" applies a biasing force to move toward the engaging member 3.

Referring to FIG. 18, similar to the second embodiment, when the engaging member 3 is in the unlocking position and the second pivoting seat 2 is in the deployed position, a gap G is formed between the engaging member 3 and the inner end surface 25 of the second pivoting seat 2. . Therefore, when the second pivot seat 2 is away from the deployed position, the engaging member 3 is displaced by the first elastic member 6 to an intermediate position, and the engaging member 3 abuts against the inner end surface 25 of the second pivot seat 2 at the intermediate position. Therefore, when the second pivot seat 2 is rotated back to the deployed position, the movable block 41" cannot be engaged with the fixing groove 42" and the engaging member 3 cannot be held in the unlocking position, so that the engaging member 3 is subjected to the first elastic member 6 Push back to return to the locked position.

It should be noted that, in the second embodiment and the third embodiment of the present invention, the trigger mechanism 5 can be designed not to rotate together with the second pivot seat 2 (that is, when the second pivot seat 2 is opposite to the first pivot seat 1) Rotating, the trigger mechanism 5 can rotate without rotating around the first axis A).

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

100‧‧‧ joint device

1‧‧‧The first pivot seat

1b‧‧‧handle

10‧‧‧First foot

11‧‧‧The first major cogging

12‧‧‧First auxiliary cogging

13‧‧‧First pivot

2‧‧‧Second pivot

20‧‧‧second foot

3‧‧‧Cards

3a‧‧‧Tongkong

3b‧‧‧ pivot hole

31‧‧‧Auxiliary teeth

32‧‧‧main convex teeth

33‧‧‧ Round body

41‧‧‧ activity hook

42‧‧‧Fixed hook

5‧‧‧Touching mechanism

51‧‧‧ button

52‧‧‧Lamination

6‧‧‧First elastic parts

7‧‧‧Second elastic parts

Claims (28)

A joint device includes: a first pivot seat including at least one first main tooth groove; a second pivot seat coupled to the first pivot seat and including at least one second main tooth groove, and is opposite to the first a pivoting seat pivots about a first axis, and when the second pivoting seat is in a deployed position relative to the first pivoting seat, the second major toothed groove is aligned with the first major toothed groove in a direction of the first axis, When the second pivot seat is away from the deployed position, the second main tooth groove is not aligned with the first main tooth groove; a latching member includes at least one main protruding tooth and is along the first axis Moving between the first pivoting seat and the second pivoting seat, when the engaging component is in a locking position, the main protruding teeth of the engaging component engage the first main tooth groove and the second main tooth groove to prevent the first The second pivot seat rotates relative to the first pivot seat. When the engaging member is in a release position, the main protruding teeth of the engaging member engage the first main tooth groove and are disengaged from the second main tooth groove to allow the The second pivot seat rotates relative to the first pivot seat; an actuation mechanism coupled to the engaging member, the touch actuator Displacement along the first axis toward the first pivoting seat to drive the engaging member to move from the locking position to the unlocking position, so that the second pivoting seat can leave the deployed position; and a limiting module When the second pivoting seat is in the deployed position, the engaging member is driven by the triggering mechanism to move from the locking position to the unlocking position, and the limiting module holds the engaging member in the unlocking position and allows The second pivot seat rotates relative to the first pivot seat. The joint device according to claim 1, wherein when the second pivot seat is away from the deployed position, the second pivot seat is prevented from being prevented due to no alignment between the first main tooth groove and the second main tooth groove The catch moves to the locked position while allowing the second pivot to rotate relative to the first pivot. The joint device of claim 1, wherein the restraining module releases the engaging member when the second pivot seat leaves the deployed position. The joint device of claim 1, wherein the restraining module does not retain the engaging member in the unlocking position when the second pivoting seat is turned back to the deployed position. The joint device of claim 1, wherein the engaging member further has a circular body centered through the first shaft, and a main protruding tooth of the engaging member is disposed on an outer circumference of the circular body. The joint device of claim 1, wherein the first pivot base comprises two first main slots that face each other in a direction perpendicular to the first axis, and the second pivot base includes two vertical ones The second main gullet opposite to each other in the direction of one axis, the engaging member comprising two main protruding teeth opposed to each other in a direction perpendicular to the first axis. The joint device of claim 1, wherein the first pivot base further comprises at least one first auxiliary gullet, the second pivot base further comprising at least one pair of second auxiliary gullets that should be the first auxiliary gullet, The engaging member further includes at least one pair of auxiliary convex teeth corresponding to the first auxiliary tooth groove and the second auxiliary tooth groove, and the first auxiliary tooth groove and the second auxiliary tooth groove are smaller in size than the main convex tooth Dimensions to prevent the primary male teeth from engaging the second auxiliary gullets when the second pivot seat exits the deployed position. The joint device of claim 1, wherein the first pivot base further comprises a first pivot extending through the first shaft, the second pivot base further comprising a second pivot extending through the first shaft The engaging member further includes a pivot hole extending into the first pivot and the second pivot. The joint device of claim 1, further comprising a first elastic member, the first elastic member connecting the engaging member to apply a bias to the engaging member to move away from the first pivoting seat toward the locking position Pressure. The joint device of claim 9, wherein the first elastic member has an opposite end along the first axis and respectively connecting the first pivot seat and the engaging member. The joint device of claim 1, further comprising a second elastic member, the second elastically connecting the trigger mechanism to apply a bias to the trigger mechanism away from the engaging member to return to its initial position. The joint device of claim 11, wherein the second elastic member has opposite ends along the first axis and respectively connecting the second pivot seat and the trigger mechanism. The joint device of claim 1, wherein the second pivot seat has a through hole; the trigger mechanism has a button and a bead, the button is disposed on a side of the second pivot opposite the engaging member, the bead Extending from the periphery of the button and passing through the through hole in the first axial direction, when the second pivot seat is in the deployed position, the button can be pressed toward the first pivot seat to drive the bead to push the engaging member, And driving the engaging member to be displaced from the locked position To the release position. The joint device of claim 1, wherein the restriction module comprises a movable hook connecting the trigger mechanism, and a fixed hook connecting the first pivot seat, the movable hook corresponding to the fixed hook, when the second pivot When the seat is in the deployed position, the triggering mechanism is driven to move toward the first pivoting seat for driving the engaging member to be displaced from the locking position to the unlocking position, and driving the movable hook to engage with the fixed hook to maintain The snap member is in the unlocked position. The joint device of claim 14, wherein when the second pivot seat leaves the deployed position, the movable hook is disengaged from the fixed hook, and the movable hook is not aligned with the fixed hook in the first axial direction to release The snap member. The joint device of claim 14, wherein the first pivot base further comprises a first pivot extending through the first shaft, the fixed hook connecting the first pivot of the first pivot seat, the second pivot The seat further includes a second pivot extending through the first shaft, the second pivot is coupled and inserted in the first pivot, and rotates relative to the first pivot about the first axis, the card The fitting includes a pivot hole through which the first pivot shaft and the second pivot shaft extend, and a through hole communicating with the pivot hole for receiving the fixing hook. The joint device of claim 14, wherein the second pivot base further defines a through hole and a through hole; the trigger mechanism has a button and a bead, and the button is disposed on the second pivot seat opposite to the one of the engaging member a side hook extending from a periphery of the button and passing through the through hole in a direction of the first axis, the bead extending from a periphery of the button and passing through the through hole in the first axial direction, when the second pivot seat Located in the deployed position, the button can be driven to move toward the first pivot to drive the bead to push the engaging member and drive the button The engaging member is displaced from the locking position to the unlocking position to drive the movable hook to engage the fixing hook to keep the engaging member in the unlocking position. The joint device of claim 1, wherein the restriction module comprises a fixing groove disposed on the engaging member, and a movable block disposed on the second pivot seat, the movable block being along the second pivot seat The second shaft is moved relative to the second pivoting seat, the second shaft is staggered to the first shaft, and the fixing slot is aligned when the second pivoting seat is in the deployed position and the engaging member is in the unlocking position. The second shaft is such that the movable block can be abutted against the fixing groove to retain the engaging member in the unlocking position. The joint device of claim 18, wherein the fixing groove is formed in a main convex tooth of the engaging member. The joint device of claim 18, wherein the restriction module further comprises a third elastic member coupled to the movable block and configured to apply a biasing force to the movable block toward the engaging member. When the second pivoting seat is in the deployed position and the triggering mechanism is released, the movable block is engaged with the fixing groove by the top of the third elastic member to hold the engaging member in the unlocking position, allowing The second pivot seat rotates relative to the first pivot seat. The joint device of claim 20, wherein the third elastic member has opposite ends that connect the movable block and the second pivot seat, respectively. The joint device of claim 18, wherein when the second pivot seat is away from the deployed position, the securing slot is not aligned with the second shaft, the movable block is disengaged from the securing slot to release the engaging member. The joint device of claim 18, wherein when the second pivot seat is away from the deployed position, the engaging member is between the locked position and the unlocked position Moving to an intermediate position at which the primary protruding teeth of the engaging member are disengaged from the second primary gullet to allow the second pivoting seat to rotate relative to the first pivoting seat, thereby rotating the second pivoting seat When the deployed position is returned, the movable block cannot be engaged with the fixed slot and the engaging member cannot be held in the unlocked position. The joint device of claim 18, wherein the first pivot seat has a groove defining surface, and the first pivot seat defines a first opening, and when the engaging member is in the unlocking position, the first An opening is aligned with the fixing groove; the movable block has a guiding surface that slidably contacts the groove defining surface, whereby the movable block is subjected to the second pivoting seat when the second pivoting seat is away from the deployed position The slot defines a surface push that disengages the movable block from the retaining slot to release the latch. The joint device of claim 24, wherein the second pivot base defines a second opening for the movable block to extend into. The joint device of claim 24, wherein the movable block further has a stop vertical surface for contacting the groove defining surface when the second pivot seat is in the deployed position to limit the second pivot seat relative to The angle of rotation of the first pivot seat. The joint device of claim 18, wherein the movable block includes a long hole extending along the second axis, and the elongated hole has a protrusion therein. The joint device of claim 27, further comprising a third elastic member disposed on the elongated hole and respectively connecting the movable block and the protruding portion to apply the movable block to move toward the engaging member Bias.