Multi-connecting-rod type hinge

Abstract

A multi-connecting-rod type hinge comprises a base unit, a connecting rod unit and two elastic pieces. The base unit comprises a base rod. The base rod is provided with a first rod body, two base connecting end portions located at the opposite ends of the first rod body respectively and two first pivot connecting portions located between the base connecting end portions. The connecting rod unit comprises two auxiliary connecting rods, two synchronous connecting rods, a pair of supporting connecting rods and a pair of linkage shaft rods. The elastic pieces are arranged between the auxiliary connecting rods and the supporting connecting rods respectively. The connecting rod unit can rotate between an unfolding position and a folding position, when the connecting rod unit is operated at the unfolding position by external force, the second linkage ends are close to each other, the connecting ends are flush with each other, and the elastic piece is in a compressed state. When the external force is eliminated, the elastic restoring force of the elastic piece can drive the connecting rod unit to rotate to the folding position, and when the supporting connecting rods are in the folding position, an angle is formed between the supporting connecting rods.

Description

Technical Field

[0001] The utility model relates to a hinge, in particular to a multi-link hinge which can rotate automatically. Background Art

[0002] The existing multi-link hinge and the electronic device mechanism used therein, if used in an automatically rotating component such as a door of a car refrigerator, will encounter the following problems. For example, the existing multi-link hinge mechanism has no automatic rotation (opening) design, and the torque source adopts a design of mutual friction between torque plates, which is not convenient for the torque value change design during the opening / closing process in operation. Therefore, there is still room for improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-link hinge that can solve at least one of the above problems.

[0004] The multi-link hinge of the utility model comprises a base unit, including at least one base rod, the base rod having a first rod body, two base connection ends respectively located at opposite ends of the first rod body and two first central pivot joints located between the base connection ends; a connecting rod unit is arranged on the base rod and comprises two auxiliary connecting rods, which are respectively pivoted on the base connection ends, each auxiliary connecting rod having a first pivot end pivoted on the corresponding base connection end and a second pivot end opposite to the first pivot end, two synchronous connecting rods are respectively pivoted on the first central pivot joint, each synchronous connecting rod has a first linkage end pivoted on the corresponding first central pivot joint and a second linkage end opposite to the first linkage end, the first linkage ends of the synchronous connecting rods are meshed with each other, At least one pair of supporting links, respectively pivoted at the second pivot end, each first supporting link having a connecting end pivoted at the corresponding second pivot end, and a pair of linking shafts, respectively rotatably passing through the second linking ends and fixedly connected to the connecting ends; and two elastic members, respectively arranged between the corresponding auxiliary links and the corresponding supporting links; the link unit can rotate between an expanded position and a folded position, when the link unit is operated by an external force in the expanded position, the second linking ends are close to each other and the connecting ends are flush, and the elastic members are in a compressed state, when the external force is eliminated, the elastic restoring force of the elastic member can drive the link unit to rotate to the folded position, and in the folded position, the supporting links are at an angle to each other.

[0005] In some implementations, each of the second linkage ends is made of an elastic material and has a first covering section and a second covering section. The first covering section and the second covering section together surround the corresponding linkage shaft and define a gap.

[0006] In some implementations, each of the synchronous links further includes a third rod connecting the first linkage end and the second linkage end, and a length of the first covering section extending from the third rod is shorter than a length of the second covering section extending from the third rod.

[0007] In some implementations, each of the second linkage ends further has a fitting plane formed on the inner side of the first covering section.

[0008] In some implementations, each of the supporting links further comprises a fourth rod body connected to the connecting end and a clamping portion protruding from the connecting end toward the fourth rod body, and each of the clamping portions is clamped with one end of the corresponding elastic member.

[0009] In some implementations, each of the supporting links further has a connecting plate portion connected to a side edge of the fourth rod body.

[0010] In some implementations, each of the connecting ends forms a square linkage hole, and each of the linkage shafts has a cylindrical portion rotatably passing through the second linkage end and at least one square column portion connected to one end of the cylindrical portion and correspondingly passing through the linkage hole.

[0011] In some implementations, the cylindrical portion has a tangent plane that can be correspondingly engaged with the fitting plane.

[0012] The utility model has at least the following effects: the connecting rod unit can be rotated between the unfolded position and the folded position; when the connecting rod unit is operated by external force at the unfolded position, the elastic member is in a compressed state to accumulate elastic restoring force; when the external force is eliminated, the elastic restoring force of the elastic member can drive the connecting rod unit to rotate to the folded position, thereby achieving the effect of automatic rotation / opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0014] Figure 1 It is a three-dimensional diagram of an embodiment of the multi-link hinge of the utility model;

[0015] Figure 2 is a three-dimensional exploded view of the embodiment;

[0016] Figure 3 is a perspective view of a synchronous link of a link unit of the embodiment;

[0017] Figure 4 is a front view of a portion of the embodiment, illustrating the linkage unit in an extended position, wherein a base is omitted;

[0018] Figure 5is a front view of a portion of the embodiment, illustrating the linkage unit in the deployed position, wherein the base and a pair of supporting links are omitted;

[0019] Figure 6 is a top view of the embodiment, illustrating the linkage unit in the deployed position;

[0020] Figure 7 is a front view of a portion of the embodiment, illustrating the linkage unit in a folded position, wherein a base is omitted;

[0021] Figure 8 is a front view of a portion of the embodiment, illustrating the linkage unit in the folded position, wherein the base and a pair of supporting links are omitted; and

[0022] Fig. 9 is a top view of the embodiment, illustrating the connecting rod unit in the folded position. DETAILED DESCRIPTION

[0023] Before the present invention is described in detail, it should be noted that similar components are represented by the same reference numerals in the following description.

[0024] See also Figure 1 and Figure 2 An embodiment of the multi-link hinge 10 of the utility model is suitable for being arranged at the door switch of a vehicle cold storage cabinet (not shown). The multi-link hinge 10 comprises a base unit 1, a link unit 2 and two elastic members 3.

[0025] The base unit 1 comprises two base rods 11 spaced apart from each other, two connecting rods 12 respectively arranged on the base rods 11, and a base 13 for the connecting rods 12 to be arranged. Each base rod 11 has a first rod body 111 (see Figure 4 ), two base connection ends 112 respectively located at opposite ends of the first rod body 111 and two first central pivot joints 113 located between the base connection ends 112. Each of the connecting rods 12 has a main body 121 connected to the first rod body 111 and two connecting pieces 122 extending laterally from the main body 121, the connecting pieces 122 are fixed to the base 13 by screw locks, and the base 13 has a recessed space to accommodate the base rod 11, the connecting rod 12 and the connecting rod unit 2.

[0026] See also Figures 1 to 3The link unit 2 is disposed between the base rods 11 and includes two auxiliary links 21, two synchronous links 22, two pairs of supporting links 23, a pair of linkage shafts 24 and six pivot shafts 25. The auxiliary links 21 are pivoted to the base connection end portions 112 by two pivot shafts 25, respectively. Each of the auxiliary links 21 has a first pivot end 212 pivoted to the corresponding base connection end portion 112, a second pivot end 213 opposite to the first pivot end 212 and a second rod body 211 connected between the first pivot end 212 and the second pivot end 213. The synchronous connecting rods 22 are respectively pivoted on the first central pivoting portion 113 of the base rod 11 by two pivoting shafts 25. Each of the synchronous connecting rods 22 has a first linkage end 222 pivoted on the corresponding first central pivoting portion 113, a second linkage end 223 opposite to the first linkage end 222, and a third rod body 221 connecting the first linkage end 222 and the second linkage end 223. A plurality of gear teeth are formed on the outer edge of each first linkage end 222, and the first linkage ends 222 are meshed with each other by the gear teeth. Each of the second linkage ends 223 is made of elastic material and has a first covering section 223a, a second covering section 223b, and a fitting plane 223c formed on the inner side of the first covering section 223a. The first covering section 223a and the second covering section 223b jointly surround the corresponding linkage shaft 24 and define a notch 224. The length of the first covering section 223 a extending from the third rod 221 is smaller than the length of the second covering section 223 b extending from the third rod 221 .

[0027] The two pairs of support links 23 are respectively pivoted on the second pivot end 213 of the auxiliary link 21 by two pivot shafts 25, and each pair of support links 23 is respectively located above the corresponding base rod 11. The elastic member 3 is a torsion spring, and is respectively sleeved on the two pivot shafts 25 and located between the auxiliary link 21 and the support link 23. Each of the first support links 23 has a connecting end 232 pivoted on the corresponding second pivot end 213, a fourth rod body 231 connected to the connecting end 232, a clamping portion 233 protruding from the connecting end 232 toward the fourth rod body 231, and a joint plate portion 234 connected to the side edge of the fourth rod body 231. Each of the connecting end 232 forms a square linkage hole 232a, and each of the clamping portions 233 is clamped by one end of the corresponding elastic member 3. The linkage shafts 24 are rotatably passed through the second linkage end 223 and fixedly connected to the connection end 232. Each linkage shaft 24 has a cylindrical portion 241 rotatably passed through the second linkage end 223 and two square column portions 242 respectively connected to both ends of the cylindrical portion 241 and correspondingly passed through the linkage hole 232a. Each cylindrical portion 241 forms a tangent plane 241a that can be correspondingly engaged with the fitting plane 223c.

[0028] See also Figures 4 to 6 , the connecting rod unit 2 can rotate between an extended position and a folded position. When the connecting rod unit 2 is operated by an external force to the extended position, the second connecting ends 223 are close to each other and the connecting ends 232 are flush, and the elastic member 3 is in a compressed state. When the external force is eliminated, the elastic restoring force of the elastic member 3 can push the two pairs of supporting connecting rods 23 to pivot upward, thereby driving the connecting shaft 24 to rotate relative to the second connecting end 223, so that the friction between the connecting shaft 24 and the second connecting end 223 generates a torque, and finally drives the connecting rod unit 2 to rotate to the folded position. See also Figures 7 to 9 In the folded position, the supporting links 23 are at an angle to each other, achieving the effect of automatic rotation / opening.

[0029] It should be noted that, by designing that the length of the first covering section 223a extending from the third rod body 221 is shorter than the length of the second covering section 223b extending from the third rod body 221, when the connecting rod unit 2 rotates to the folded position, the deformation amount of the second covering section 223b caused by the friction force of the connecting shaft 24 is greater than the deformation amount of the first covering section 223a caused by the friction force of the connecting shaft 24, so that the gap 224 becomes smaller, that is, the second connecting end 223 more tightly covers the connecting shaft 24, so that the torque generated by the friction between the connecting shaft 24 and the second connecting end 223 is increased. When applied to the vehicle cold storage cabinet (not shown), the process of the connecting rod unit 2 rotating to the folded position is the process of opening the cabinet door, so that the speed of opening the cabinet door will be relatively slow. On the contrary, the process of rotating the connecting rod unit 2 from the folded position to the unfolded position is the process of closing the cabinet door. Similarly, because the deformation of the second covering section 223b caused by the friction force of the rotation of the connecting shaft 24 will be greater than the deformation of the first covering section 223a caused by the friction force of the rotation of the connecting shaft 24, the gap 224 becomes larger, that is, the second connecting end 223 more loosely covers the connecting shaft 24, so that the torque generated by the friction between the connecting shaft 24 and the second connecting end 223 will decrease, thereby reducing the force required to close the cabinet door, and the user can close the cabinet door more easily.

[0030] Similarly, by virtue of the design that the cutting plane 241a and the fitting plane 223c can be relatively matched, when the connecting rod unit 2 is rotated to the folded position, as the connecting shaft 24 rotates the cutting plane 241a and the fitting plane 223c to gradually separate, the connecting shaft 24 will slightly push open the second connecting end 223 to slightly enlarge the gap 224, thereby increasing the interference between the second connecting end 223 and the connecting shaft 24, and increasing the torque generated by the friction between the connecting shaft 24 and the second connecting end 223. Then, by virtue of the design mentioned in the previous paragraph that the length of the first covering section 223a extending from the third rod body 221 is shorter than the length of the second covering section 223b extending from the third rod body 221, the gap 224 is finally reduced and the torque can also be increased. On the contrary, during the process of the connecting rod unit 2 rotating from the folded position to the unfolded position, as the connecting shaft 24 rotates, the cutting plane 241a gradually fits into the fitting plane 223c, so that the gap 224 becomes slightly smaller, so that the interference between the second connecting end 223 and the connecting shaft 24 becomes smaller, and the torque generated by the friction between the connecting shaft 24 and the second connecting end 223 will decrease. Then, by the design mentioned in the previous paragraph that the length of the first covering section 223a extending from the third rod body 221 is shorter than the length of the second covering section 223b extending from the third rod body 221, the gap 224 is finally enlarged and the torque can also be reduced, thereby achieving the effect of releasing the torque.

[0031] In summary, the multi-link hinge 10 of the present invention can rotate between an extended position and a folded position by means of the link unit 2. When the link unit 2 is operated at the extended position by an external force, the elastic member 3 is in a compressed state to accumulate elastic restoring force. When the external force is eliminated, the elastic restoring force of the elastic member 3 can drive the link unit 2 to rotate to the folded position, thereby achieving the effect of automatic rotation / opening, and thus the purpose of the present invention can be achieved.

[0032] The above description is only an embodiment of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made according to the claims and description of the present invention are still within the scope of the present invention.

Claims

1. A multi-link hinge, characterized in that: Include: The base unit comprises at least one base rod, the base rod having a first rod body, two base connecting ends respectively located at opposite ends of the first rod body, and two first central pivoting parts located between the base connecting ends; A connecting rod unit is arranged on the base rod and comprises Two auxiliary connecting rods are respectively pivoted at the base connecting end, each auxiliary connecting rod has a first pivot end pivoted at the corresponding base connecting end and a second pivot end opposite to the first pivot end, Two synchronous links are respectively pivoted at the first central pivot joint, each synchronous link having a first linkage end pivoted at the corresponding first central pivot joint and a second linkage end opposite to the first linkage end, the first linkage ends of the synchronous links meshing with each other, at least one pair of supporting links, each of which is pivotally mounted on the second pivot end, each first supporting link having a connecting end pivotally mounted on the corresponding second pivot end, and a pair of linkage shafts, each rotatably passing through the second linkage end and fixedly connected to the connection end; and Two elastic members are respectively arranged between the corresponding auxiliary connecting rod and the corresponding supporting connecting rod; The connecting rod unit can rotate between an expanded position and a folded position. When the connecting rod unit is operated in the expanded position by external force, the second linking ends are close to each other and the connecting ends are flush, and the elastic member is in a compressed state. When the external force is eliminated, the elastic restoring force of the elastic member can drive the connecting rod unit to rotate to the folded position. In the folded position, the supporting links are at an angle to each other.

2. The multi-link hinge according to claim 1, characterized in that: Each of the second linkage ends is made of elastic material and has a first covering section and a second covering section. The first covering section and the second covering section together surround the corresponding linkage shaft and define a gap.

3. The multi-link hinge according to claim 2, characterized in that: Each of the synchronous connecting rods further comprises a third rod body connecting the first linkage end portion and the second linkage end portion, and a length of the first covering section extending from the third rod body is shorter than a length of the second covering section extending from the third rod body.

4. The multi-link hinge according to claim 2, characterized in that: Each of the second linkage ends also has a fitting plane formed on the inner side of the first covering section.

5. The multi-link hinge according to claim 1, characterized in that: Each of the supporting connecting rods further comprises a fourth rod body connected to the connecting end portion and a clamping portion protruding from the connecting end portion toward the fourth rod body, and each of the clamping portions is clamped with one end of a corresponding elastic member.

6. The multi-link hinge according to claim 5, characterized in that: Each of the supporting connecting rods also has a connecting plate portion connected to the side edge of the fourth rod body.

7. The multi-link hinge according to claim 4, characterized in that: Each of the connecting ends forms a square linkage hole, and each of the linkage shafts comprises a cylindrical portion rotatably passing through the second linkage end and at least one square column portion connected to one end of the cylindrical portion and correspondingly passing through the linkage hole.

8. The multi-link hinge according to claim 7, characterized in that: The cylindrical portion has a tangent plane which can be correspondingly engaged with the fitting plane.

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