CN219345250U - Double-shaft co-acting structure - Google Patents

Abstract

The double-shaft co-moving structure comprises a long linkage plate, wherein the second side surface of the long linkage plate is connected with and supports against at least one elastic piece, and a long limiting plate is arranged on one side of the long linkage plate in parallel; a first shaft rod and a second shaft rod are coaxially provided with a first tooth-shaped piece and a second tooth-shaped piece respectively, and two ends of the first shaft rod and the second shaft rod are positioned on the long linkage plate and the long limiting plate in a rotating mode respectively; one end of a third tooth-shaped piece and one end of a fourth tooth-shaped piece are respectively positioned on the first side face of the long linkage plate, and the third tooth-shaped piece and the fourth tooth-shaped piece are respectively connected with the first tooth-shaped piece and the second tooth-shaped piece in a tooth manner in a relative movement manner, so that when the first shaft rod and the second shaft rod relatively rotate in the opposite direction, the third tooth-shaped piece, the fourth tooth-shaped piece and the long linkage plate synchronously move, and at least one elastic piece is pushed by the long linkage plate.

Description

Two-axis synchronous structure

technical field

The utility model relates to a hinge, in particular to a double-axis co-moving structure of a foldable electronic device.

Background technique

Currently common flip-top or foldable electronic devices, in addition to the original keyboard input unit, the display unit can also be used for touch input operations, and due to this change in operating mode, existing electronic devices can In addition to the original use mode, the touch screen or the flexible screen can be turned to 360 degrees through the two-axis co-moving structure, so that the touch screen and the back of the keyboard input unit or the back of the flexible screen are relatively superimposed for separate use.

As shown in TWM508190's "Double-shaft Linkage Rotating Shaft", a double-axis synchronous movement structure is disclosed, which is mainly driven by the transmission column when the first shaft drives the first runner to rotate an angle. , so that the second runner and the second shaft are synchronously rotated at the same angle, and at the same time, the overall friction force of the first spindle and the second spindle is respectively increased by the first friction washer and the second friction washer, so as to compensate the two cores respectively. torque required to rotate the shaft. The patent announcement No. CN205064574U's "Tilting and returning to the official 360-degree dual-axis synchronous damping shaft" provides another dual-axis synchronous structure, which mainly includes two shaft cores, two worm gears, a worm and at least two There are two limit connecting plates, one worm gear is fixed on one shaft core, and the other worm gear is fixed on the other shaft core, and the two limit connecting plates are both sleeved on the two shaft cores and located between the two worm gears. On both sides of the shaft, the two shaft cores are radially separated by a set distance, and can freely rotate in the circumferential direction relative to the two limit connecting plates; the worm is located in the accommodation space surrounded by the two limit connecting plates and the two worm wheels. Both sides of the worm mesh with two worm gears respectively; through several butterfly shrapnel, washers and nuts respectively, the function of tight fit and positioning is realized through the lock nut, and the torque is provided through the butterfly shrapnel.

However, after the above-mentioned transmission column/worm is installed in the electronic device, due to the poor structural strength of the fixed piece and the pressure piece clamping the transmission worm, the relative rotation of the display unit and the keyboard input unit will cause a large impact on the three worms. When the force is applied, it will cause the fixed piece and the pressing piece to be stretched, causing the transmission worm to shift, or the two worms to slide axially, so that the movement of the transmission worm itself and the stability of the synchronous action with other worms cannot be improved. , and it is easy to cause the screen to shake when the user touches the screen. In addition, when an elastic component is used to cooperate with a friction washer or several butterfly-shaped shrapnels are used to provide torque, the overall structure is more complicated.

Utility model content

In view of this, in order to provide a structure different from the prior art and improve the above-mentioned shortcomings, the inventor has accumulated many years of experience and continuous research and development, so the utility model is produced.

One purpose of the present utility model is to provide a dual-axis co-moving structure, which can solve the problem that the synchronous action stability between the worms of the dual-axis co-moving structure in the prior art cannot be improved, which easily causes the screen to shake, and the overall problem of providing torsion The structure is relatively complicated, but by connecting the third and fourth toothed parts parallel to each other and at least one elastic part on the side of an elongated connecting plate, the first and second shafts pass through the elongated connecting plate respectively. The moving plate, and the first toothed part and the second toothed part on the first shaft and the second shaft respectively correspond to the structure of the third and fourth toothed parts, so that the first shaft and the second shaft The synchronous rotation of the rods is stable, reduces the shaking degree of the screen, and simplifies the overall structure to reduce production costs.

In order to achieve the above-mentioned purpose, the dual-axis co-moving structure provided by the utility model includes an elongated linkage plate, an elongated limiting plate, a first shaft, a second shaft, a third toothed part and a fourth toothed member. Wherein the elongated linkage plate has a first side and a second side opposite to each other, and at least one elastic member is connected and pressed against the second side; One side of the shaped linkage plate; the first shaft is coaxially provided with a first toothed part, and the two ends of the first shaft are respectively positioned on the elongated linkage plate and the elongated limiting plate in a rotational manner; the second The two shafts are parallel to the first shaft, the second shaft is coaxially provided with a second toothed part, and the two ends of the second shaft are respectively positioned on the elongated linkage plate and the elongated limiting plate in a rotational manner; One end of the third toothed part is positioned on the first side of the elongated linkage plate, and the third toothed part engages with the first toothed part in a relatively movable manner; the fourth toothed part is parallel to the third toothed part , one end of the fourth tooth-shaped member is positioned on the first side of the elongated link plate, and the fourth tooth-shaped member engages with the second tooth-shaped member in a relatively movable manner, so that the first shaft and the second shaft When the rod rotates in the opposite direction, the third toothed part, the fourth toothed part and the elongated linking plate are moved synchronously, and at least one elastic piece is pushed by the elongated linking plate.

During implementation, the elongated connecting plate has a first shaft hole, a first positioning hole, a second positioning hole and a second shaft hole that run through and are arranged in the long direction, and one end of the first shaft rod passes through the The first shaft hole; one end of the third toothed part is positioned in the first positioning hole; one end of the fourth toothed part is positioned in the second positioning hole; one end of the second shaft passes through the second shaft hole.

During implementation, the elongated limiting plate has a first hole, a first positioning groove, a second positioning groove and a second hole arranged in the longitudinal direction, and the other end of the first shaft passes through the first hole to connect a The first connecting piece; the other end of the third toothed part is positioned in the first positioning slot; the other end of the fourth toothed part is positioned in the second positioning slot; the other end of the second shaft passes through the second hole to Connect a second connector.

During implementation, the utility model further includes a positioning member, at least one elastic member includes a first spring and a second spring, after one end of the first shaft passes through the first shaft hole, then passes through the first spring, the first One end of the shaft rod is combined with the positioning member; one end of the second shaft rod passes through the second shaft hole and then passes through the second spring, and one end of the second shaft rod is combined with the positioning member.

During implementation, the positioning member includes a blocking plate and a limiting plate, after one end of the first shaft rod and one end of the second shaft rod respectively pass through the blocking plate, they are connected and limited by the limiting plate.

During implementation, the utility model further includes a first concave-convex wheel and a second concave-convex wheel. One side of the concave-cam wheel, the other side of the first concave-cam wheel is connected and pressed against the first spring; the second concave-convex part is connected to one side of the second concave-cam wheel, and the other side of the second concave-cam wheel is connected and pressed against the second spring .

During implementation, the utility model further includes a positioning member, at least one elastic member includes a third spring and a fourth spring, one end of the third toothed member passes through and is positioned in the first positioning hole, and the third toothed member After passing through the first positioning hole, one end of the third tooth-shaped member is combined with the positioning member; one end of the fourth tooth-shaped member passes through and is positioned in the second positioning hole, and the fourth tooth-shaped member passes through the second positioning hole. After passing through the second positioning hole, one end of the toothed part passes through the fourth spring, and one end of the fourth toothed part is combined with the positioning part.

During implementation, the positioning piece includes a blocking plate and a limiting plate, and one end of the third toothed piece and one end of the fourth toothed piece respectively pass through the blocking plate, and then are connected with the limiting plate for limiting.

During implementation, the first positioning hole includes a first groove and a third shaft hole communicating with each other. A bump; the third tooth-shaped member includes a third shaft arranged coaxially, and after one end of the third shaft passes through the third shaft hole, the first bump is positioned in the first groove; the second positioning hole includes A second groove and a fourth shaft hole communicated with each other, the first side of the elongated link plate has a second groove, and the axial side of the fourth tooth has a second protrusion; the fourth tooth The component includes a fourth shaft arranged coaxially, and after one end of the fourth shaft passes through the fourth shaft hole, the second protrusion is positioned in the second slot.

During implementation, the first toothed part and the second toothed part are helical gears respectively; the third toothed part has a first toothed part and a third axle bar coaxially arranged, and the first toothed part has an upper In the tooth part, the upper tooth part engages with the first tooth-shaped member in a relatively movable manner, and the upper tooth part is a plurality of helical teeth.

During implementation, the fourth toothed part has a second toothing part and a fourth shaft arranged coaxially, the second toothing part has a lower tooth part, and the lower tooth part engages the second tooth shape in a relatively movable manner. parts, the lower tooth part is a plurality of helical teeth.

For the convenience of having a deeper understanding of the utility model, it will be described in detail later.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is the three-dimensional appearance schematic diagram of the preferred embodiment of the present utility model;

Fig. 2 is an exploded view of components of a preferred embodiment of the present utility model;

Fig. 3 is a side view of a preferred embodiment of the present utility model;

Fig. 4 is the A-A ' sectional view of Fig. 3;

Fig. 5 is the B-B ' sectional view of Fig. 3;

Fig. 6 is a schematic diagram of the use state when the first and second rotating shafts of the present invention are relatively turned to 90 degrees;

Fig. 7 is a schematic diagram of the use state when the first and second rotating shafts of the present invention are relatively turned to 180 degrees;

Fig. 8 is a schematic diagram of the use state when the first and second rotating shafts of the present invention are relatively turned to 360 degrees;

Fig. 9 is a schematic perspective view of the first and second rotating shafts of the present invention when they are turned over 360 degrees relative to each other.

Explanation of reference signs

1: Two-axis synchronous structure;

2: Long connecting plate;

21: first side;

211: first slot;

212: second slot;

22: second side;

221: the first concavo-convex part;

222: the third shaft hole;

223: fourth shaft hole;

224: the second concavo-convex part;

23: the first shaft hole;

24: the first concave cam wheel;

241: the first concave-convex surface;

25: the first positioning hole;

26: the second positioning hole;

27: second shaft hole;

28: the second concave cam;

281: the second concave-convex surface;

3: Long limit plate;

31: the first hole;

32: the first positioning slot;

33: the second positioning slot;

34: second hole;

4: Positioning piece;

41: blocking plate;

411: the first circular hole;

412: the second circular hole;

413: the third round hole;

414: the fourth round hole;

42: limit plate;

421: the first card slot;

422: first piercing;

423: second perforation;

424: the second card slot;

5: the first shaft;

51: the first toothed part;

52: first spring;

53: the first connector;

6: Elastic piece;

7: Second shaft;

71: the second toothed part;

72: second spring;

73: the second connecting piece;

8: the third toothed part;

81: the third shaft;

82: first toothing part;

821: upper teeth;

83: the first bump;

84: the third spring;

9: the fourth toothed part;

91: the fourth shaft;

92: second toothing part;

921: lower teeth;

93: the second bump;

931: Parallel spacing;

94: Fourth spring.

Detailed ways

The double-axis synchronous structure mainly includes an elongated linkage plate 2, an elongated limiting plate 3, a first shaft 5, a second shaft 7, a third toothed part 8 and a fourth toothed Item 9. The elongated linkage plate 2 has opposite first side 21 and second side 22, and at least one elastic member 6 is connected and pressed against the second side 22; the elongated limiting plate 3 is arranged parallel to the elongated linkage plate 2; the first shaft 5 is coaxially provided with a first toothed part 51, and the two ends of the first shaft 5 are respectively positioned on the elongated linkage plate 2 and the elongated stop plate 3 in a rotational manner ; The second shaft rod 7 is coaxially provided with a second toothed part 71, and the two ends of the second shaft rod 7 are respectively positioned on the elongated linkage plate 2 and the elongated stop plate 3 in a rotational manner; the third tooth One end of the shaped part 8 is positioned on the first side 21 of the elongated link plate 2, the third toothed part 8 is toothed to the first toothed part 51; the fourth toothed part 9 is parallel to the third toothed part 8, and the third toothed part 8 One end of the four-toothed part 9 is positioned on the first side 21 of the elongated linkage plate 2, and the fourth toothed part 9 is toothed to the second toothed part 71, so that the first shaft 5 and the second shaft 7 When rotating in the opposite direction, the third toothed part 8 , the fourth toothed part 9 and the elongated linking plate 2 are moved synchronously, and at least one elastic piece 6 is pushed by the elongated linking plate 2 .

Please refer to Fig. 1 to Fig. 5, which is a preferred embodiment of the dual-axis co-moving structure 1 of the present invention, including an elongated linkage plate 2, an elongated limiting plate 3, a positioning member 4, a The first shaft 5 , a plurality of elastic parts 6 , a second shaft 7 , a third toothed part 8 and a fourth toothed part 9 . Wherein the elongated link plate 2 has a first side 21 and a second side 22 opposite to each other, the first side 21 has a first groove 211 and a second groove 212, the first groove 211 and the second groove 212 It is connected to form an elongated groove; the second side 22 has a first concave-convex portion 221 , a third shaft hole 222 , a fourth shaft hole 223 and a second concave-convex portion 224 arranged in the longitudinal direction. The first concave-convex portion 221 runs through a first shaft hole 23 coaxially, the first concave-convex portion 221 abuts a side surface of a first concave-convex wheel 24 , and the first concave-convex portion 221 and a first concave-convex wheel 24 on one side surface A concave-convex surface 241 is correspondingly engaged; the third shaft hole 222 is axially connected to the first groove 211, and the third shaft hole 222 and the first groove 211 are combined to form a first positioning hole 25; the fourth shaft hole 223 is connected to the second The slot 212, the fourth shaft hole 223 and the second slot 212 are combined to form a second positioning hole 26; the second concave-convex part 224 is coaxially penetrated by a second shaft hole 27, and the second concave-convex part 224 is docked with a second concave-convex wheel 28 , and the second concave-convex portion 224 is correspondingly engaged with a second concave-convex surface 281 on one side of the second concave-convex wheel 28 .

The elongated limiting plate 3 is arranged parallel to one side of the elongated linkage plate 2 in a manner away from the first side 21, and the elongated limiting plate 3 has a first hole 31 and a first positioning groove 32 arranged in the longitudinal direction 1. A second positioning groove 33 and a second hole 34, wherein the first hole 31 and the second hole 34 are respectively circular holes running through the elongated stop plate 3 transversely, the first positioning groove 32 and the second positioning groove 33 are respectively square grooves running through the elongated limiting plate 3 transversely. And the positioning piece 4 is arranged on the other side of the elongated linkage plate 2 in parallel in a manner away from the second side 22. The positioning piece 4 includes a blocking plate 41 and a limiting plate 42. The blocking plate 41 has a A first round hole 411, a second round hole 412, a third round hole 413 and a fourth round hole 414; the limiting plate 42 has a first slot 421 corresponding to the four round holes, a first A through hole 422 , a second through hole 423 and a second locking slot 424 .

A helical gear is coaxially arranged on the first shaft 5, and the helical gear is used as a first toothed member 51; one end of the first shaft 5 has two axially parallel surfaces and an annular groove. After passing through the first shaft hole 23 of the elongated linkage plate 2, one end of the first axle rod 5 passes through the first concave cam wheel 24 and a compression spring in sequence, and then passes through the first circular hole 411 of the blocking plate 41 to Buckled in the first card slot 421, so that the two ends of the compression spring are respectively connected and pressed against the other side of the first concave cam wheel 24 and one side of the blocking plate 41, and one end of the first shaft 5 is combined with the Positioning piece 4. In practice, the compression spring is used as the first spring 52 , and the plurality of elastic members 6 include a first spring 52 , a second spring 72 , a third spring 84 and a fourth spring 94 . After the other end of the first shaft 5 passes through the first hole 31 of the elongated limiting plate 3, a first connecting piece 53 is connected, and the first connecting piece 53 can be used to link a touch screen or a flexible screen of an electronic device. side. In this way, the two ends of the first shaft 5 can be respectively positioned on the elongated linkage plate 2 and the elongated stop plate 3 in a rotational manner, and the first shaft 5, the first concave cam 24 and the The first connecting member 53 rotates synchronously.

The second shaft 7 is parallel to the first shaft 5, and the second shaft 7 is coaxially provided with a helical gear, which is used as the second toothed part 71; one end of the second shaft 7 has two axially parallel surfaces and an annular groove. After one end of the second shaft rod 7 passes through the second shaft hole 27 of the elongated linkage plate 2, it passes through the second concave cam wheel 28 and a compression spring in sequence, and then passes through the fourth circular hole 414 of the blocking plate 41 to Buckled in the second card slot 424, so that the two ends of the compression spring are respectively connected and pressed against the other side of the second concave cam wheel 28 and one side of the blocking plate 41, and one end of the second shaft 7 is combined with the Positioning piece 4. In practice, the compression spring is used as the second spring 72 . After the other end of the second shaft rod 7 passes through the second hole 34 of the elongated limiting plate 3, a second connecting piece 73 is connected, and the second connecting piece 73 can be used to link the keyboard input unit of the electronic device or the flexible screen to another side. Thereby, the two ends of the second axle rod 7 can be respectively positioned on the elongated linkage plate 2 and the elongated stop plate 3 in a rotational manner, and the second axle rod 7, the second concave cam 28 and the The second connecting member 73 rotates synchronously.

The third toothed part 8 has a third shaft 81 and a first toothing portion 82, the third shaft 81 is parallel to the first shaft 5, one end of the third shaft 81 is a circular rod, and the first toothing One axial side of the portion 82 is provided with a first protrusion 83 with two axial planes. The first toothing portion 82 is disposed coaxially with the third shaft 81 . The first toothing portion 82 is a plurality of helical teeth with flattened bottoms, and the plurality of helical teeth are used as the upper tooth portion 821 . One end of the third shaft 81 passes through the third shaft hole 222 of the elongated linkage plate 2, and then passes through a compression spring, the second round hole 412 of the blocking plate 41 and the first through hole 422 of the limiting plate 42 in sequence. , so that the first protrusion 83 is positioned in the first slot 211 , so that one end of the third shaft 81 is positioned on the first side 21 of the elongated linkage plate 2 . The two ends of the compression spring are respectively pressed against the second side 22 of the elongated linkage plate 2 and one side of the blocking plate 41, and the third shaft 81 can move back and forth in the first through hole 422 of the positioning member 4 to implement , the compression spring is used as the third spring 84. In addition, the upper tooth portion 821 is geared upwards to the first tooth-shaped member 51; and the other end of the third shaft 81 is a circular rod with axial double planes, and the end of the circular rod is inserted into the first positioning groove 32 Inside, the circular rod can move back and forth in the first positioning groove 32 and prevent the third shaft rod 81 from rotating.

The fourth toothed part 9 has a fourth shaft 91 and a second toothing portion 92, the fourth shaft 91 is parallel to the second shaft 7, one end of the fourth shaft 91 is a circular rod, and the second toothing One axial side of the portion 92 is provided with a second protrusion 93 with two axial planes. The second toothing part 92 is arranged coaxially with the fourth shaft rod 91, and the second toothing part 92 is a plurality of helical teeth flattened at the top, and the plurality of helical teeth are used as the lower tooth part 921; the second toothing part 92 There is a parallel distance 931 between the top plane and the bottom plane of the first engaging portion 82 . One end of the fourth shaft 91 passes through the fourth shaft hole 223 of the elongated linkage plate 2, and then passes through a compression spring, the third circular hole 413 of the blocking plate 41 and the second through hole 423 of the limiting plate 42 in sequence. , so that the second protrusion 93 is positioned in the second groove 212, so that one end of the fourth shaft 91 is positioned on the first side 21 of the elongated linkage plate 2, so that the two ends of the compression spring respectively press against the long The second side 22 of the connecting plate 2 and one side of the blocking plate 41, and the fourth shaft 91 can move back and forth in the second through hole 423 of the positioning member 4. During implementation, the compression spring is used as the fourth spring 94. In addition, the lower tooth portion 921 is geared downwards to the second tooth-shaped member 71; and the other end of the fourth shaft 91 is a circular rod with two axial planes, and the end of the circular rod is inserted into the second positioning groove. 34, so that the round rod can move back and forth in the second positioning groove 34, and prevent the fourth shaft rod 91 from rotating.

In this way, as shown in Figures 5 to 9, when the user opens the touch screen from 0 degrees when it is covered, and then turns it over 180 degrees, so that the touch screen and the back of the keyboard input unit or the flexible screen are relatively superimposed , through the reverse rotation of the first shaft 5 and the second shaft 7, the first toothed part 51 and the second toothed part 71 can respectively drive the third toothed part 8 and the fourth toothed part 9, so that The third toothed part 8 and the fourth toothed part 9 move in the axial direction respectively, and at the same time push the elongated linking plate 2 with the first toothing part 82 and the second toothing part 92, respectively compress the plurality of elastic parts 6 to Generate rotational friction torque. And the first concave-convex surface 241 of the first concave-convex wheel 24 coaxially abuts and rotates with respect to the first concave-convex portion 221 of the elongated link plate 2, and the second concave-convex surface 281 of the second concave-convex wheel 28 is relative to the second concave-convex portion. 224 coaxial docking rotation, and then squeeze each other so that the first concave cam wheel 24 and the second concave cam wheel 28 continue to squeeze the first spring 52 and the second spring 72 respectively, then it can have the effect of free stagnation, so that the touch screen and The keyboard input unit or the flexible screen is bent at an angle.

To sum up, the first shaft 5 and the second shaft 7 of the present utility model respectively pass through the elongated linkage plate 2, the first toothed part 51 on the first shaft 5 and the second shaft 7, The second toothed part 71 corresponds to the third toothed part 9 and the fourth toothed part 8 respectively, so that when the first shaft 5 and the second shaft 7 rotate in reverse, the elongated linkage plate 2 and The third toothed part 8 and the fourth toothed part 9 move synchronously, and when the elongated link plate 2 moves axially with the third toothed part 8 and the fourth toothed part 9, the elastic part 6 is compressed to The generation of torque can effectively simplify the overall structure, reduce the number of parts and reduce the production cost compared with the gear synchronous structure in the prior art. And through the mutual meshing of the multiple helical teeth of the first toothed part 51 and the first toothing part 82, and the mutual toothing of the multiple helical teeth of the second toothed part 71 and the second toothing part 92, then can Make the synchronous rotation of the first shaft 5 and the second shaft 7 stable, reduce the shaking degree of the screen, and prolong the service life; There is a parallel space between them. When the distance of the parallel space is reduced, the overall volume can be effectively reduced, and when the distance of the parallel space is increased, the effect of position avoidance can be achieved.

Although the utility model discloses preferred specific embodiments to achieve the above object, it is not intended to limit the structural features of the utility model. Any person skilled in the art should know that under the technical spirit of the utility model, Any easily conceivable changes or modifications are possible, and all are covered by the patent scope of the present utility model.

Claims (11)

1. A dual-axis synchronous structure, characterized in that, comprising: An elongated linking plate, which has a first side and a second side opposite to each other, at least one elastic member is connected and pressed against the second side; an elongated limiting plate, which is away from the first The side surface is arranged in parallel on one side of the elongated linkage plate; a first shaft is coaxially provided with a first tooth-shaped member, and the two ends of the first shaft are respectively positioned on the elongate in a rotational manner. shaped linkage plate and the elongated limiting plate; a second shaft, which is parallel to the first shaft, and the second shaft is coaxially provided with a second toothed part, and the two ends of the second shaft respectively rotated on the elongated linkage plate and the elongated limiting plate; a third toothed piece, one end of which is positioned on the first side of the elongated linkage plate, and the third The tooth-shaped member is toothed to the first tooth-shaped member in a relatively movable manner; and a fourth tooth-shaped member is parallel to the third tooth-shaped member, and one end of the fourth tooth-shaped member is positioned on the elongated linking plate on the first side, and the fourth tooth-shaped member engages with the second tooth-shaped member in a relatively movable manner, so that when the first shaft and the second shaft rotate in opposite directions, the third The toothed part, the fourth toothed part and the elongated linking plate move synchronously, and the at least one elastic part is pushed by the elongated linking plate. 2. The dual-axis co-moving structure according to claim 1, characterized in that, the elongated linkage plate has a first axis hole, a first positioning hole, and a second axis hole arranged transversely and arranged in the long direction. positioning hole and a second shaft hole, one end of the first shaft passes through the first shaft hole; the one end of the third toothed part is positioned in the first positioning hole; the fourth toothed part One end is positioned in the second positioning hole; one end of the second shaft passes through the second shaft hole. 3. The dual-axis synchronous structure as claimed in claim 2, wherein the elongated limiting plate has a first hole, a first positioning slot, a second positioning slot and a second positioning slot arranged in the longitudinal direction. hole, after the other end of the first shaft passes through the first hole, it is used to connect a first connecting piece; the other end of the third toothed piece is positioned in the first positioning groove; the fourth toothed piece The other end of the second shaft is positioned in the second positioning slot; the other end of the second shaft passes through the second hole for connecting with a second connecting piece. 4. The dual-axis synchronous structure according to claim 2 or 3, further comprising a positioning member, the at least one elastic member includes a first spring and a second spring, the first shaft rod After passing through the first shaft hole, one end passes through the first spring, and the one end of the first shaft rod is combined with the positioning member; after the one end of the second shaft rod passes through the second shaft hole, Passing through the second spring, the one end of the second shaft is combined with the positioning member. 5. The dual-axis synchronous structure according to claim 4, wherein the positioning member comprises a blocking plate and a limiting plate, the one end of the first shaft and the one end of the second shaft are respectively After passing through the blocking plate, the limiting plate is used to connect the limiting plate. 6. The dual-axis co-moving structure according to claim 4, further comprising a first concave-convex wheel and a second concave-convex wheel, the second side of the elongated linkage plate has a first concave-convex part and a second concave-convex part, the first concave-convex part butts against one side of the first concave-convex wheel, and the other side of the first concave-convex wheel connects and presses the first spring; the second concave-convex part butts against the second One side of the concave cam wheel and the other side of the second concave cam wheel are connected and pressed against the second spring. 7. The dual-axis synchronous structure according to claim 2 or 3, further comprising a positioning member, the at least one elastic member includes a third spring and a fourth spring, the third toothed member The one end passes through and is positioned in the first positioning hole, after the one end of the third toothed part passes through the first positioning hole, and then passes through the third spring, the one end of the third toothed part combines On the locating piece; the one end of the fourth tooth-shaped piece passes through and is positioned in the second positioning hole, the one end of the fourth tooth-shaped piece passes through the second positioning hole, and then passes through the first positioning hole Four springs, the one end of the fourth tooth-shaped part is combined on the positioning part. 8. The dual-axis synchronous structure according to claim 7, wherein the positioning member comprises a blocking plate and a limiting plate, the one end of the third tooth-shaped member and the end of the fourth tooth-shaped member After one end passes through the blocking plate respectively, the limiting plate is connected for limiting. 9. The dual-axis synchronous structure according to claim 2 or 3, wherein the first positioning hole includes a first slot and a third shaft hole communicating with each other, and the first positioning hole of the elongated linkage plate The first groove is provided on one side, and the axial side of the third tooth-shaped member has a first protrusion; the third tooth-shaped member includes a third shaft arranged coaxially, and the third shaft After one end passes through the third shaft hole, the first protrusion is positioned in the first slot; the second positioning hole includes a second slot and a fourth shaft hole communicating with each other, and the elongated link plate The first side surface has the second groove, and the fourth tooth-shaped member has a second protrusion on one side in the axial direction; the fourth tooth-shaped member includes a fourth shaft rod arranged coaxially, and the fourth shaft After one end of the rod passes through the fourth shaft hole, the second protrusion is positioned in the second groove. 10. The double-shaft synchronous structure according to claim 1, wherein the first toothed part and the second toothed part are respectively helical gears; the third toothed part has a first toothing part and a third shaft arranged coaxially, the first toothing portion has an upper tooth portion, the upper tooth portion engages the first tooth-shaped member in a relatively movable manner, and the upper tooth portion is a plurality of helical teeth . 11. The dual-axis synchronous structure as claimed in claim 10, wherein the fourth toothed part has a second toothing part and a fourth shaft arranged coaxially, and the second toothing part has The lower tooth portion engages with the second tooth-shaped member in a relatively movable manner, and the lower tooth portion is a plurality of helical teeth.

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