A synchronous linkage armrest joint mechanism

Abstract

The utility model provides a synchronous linkage armrest joint mechanism, comprising a base, two upper armrest tubes, two lower armrest tubes and a linkage assembly, wherein two movable holes, two rotating holes and a guide hole are opened on the base, one end of the two upper armrest tubes is rotationally connected to the movable hole and the rotating hole respectively through rivets, one end of the two lower armrest tubes is connected to the base and the linkage assembly through rivets, and the linkage assembly comprises two cranks, one end of the two cranks is rotationally connected to the guide hole, and the other end of the two cranks is rotationally connected to the end of the two lower armrest tubes respectively through rivets. When the armrest needs to be folded, the two upper armrest tubes move horizontally toward a side away from each other, one end of the two cranks moves vertically downward along the guide hole, and the other end of the two cranks pushes the lower armrest tubes to rotate around the base connection point respectively, and at the same time, the upper armrest tubes are synchronously followed and rotated along the movable hole and the rotating hole, thereby realizing synchronous folding of the armrest, and solving the problem that the existing armrests are inconvenient to synchronously fold.

Description

Technical Field

[0001] The utility model relates to the field of armrests, and in particular to a synchronously linked armrest joint mechanism. Background Art

[0002] A handrail refers to a horizontal bar or handle used to maintain body balance and support the body. Handrails are widely used in daily life, such as handrails on stairs, handrails on strollers, handrails on railings, handrails on subways, etc. Most handrails are fixed and do not need to be folded, but some handrails need to be folded, such as the handrails on some strollers. After folding the handrails, the stroller is convenient for storage and carrying.

[0003] At present, some armrest folding methods are to unlock the clamping part of the armrest and then fold the other parts of the armrest separately. For example, in a folding armrest disclosed in the Chinese patent with patent number CN212354231U, by pressing the pressing part provided at one end of the pressing block, the elastic force of the elastic member is overcome, so that the clamping part at the other end of the pressing block is separated from the slot. At this time, the armrest body can be rotated to the plane where the first connecting rod group is located, and then the second connecting rod group is rotated to the plane where the armrest body is located, so as to achieve the folding effect. When unfolding, the pressing part provided at one end of the pressing block is pressed to overcome the elastic force of the elastic member, and the armrest body is rotated so that the clamping part at the other end of the pressing block is aligned with the slot, and the pressing part of the pressing block is released. Under the action of the elastic member, the clamping part is clamped in the slot, so that the armrest body cannot rotate, and the armrest body is unfolded. However, although this folding method is simple and convenient to operate, it is inconvenient to synchronously fold the unlocked armrest, so a handrail joint mechanism capable of synchronous linkage is proposed. Utility Model Content

[0004] The utility model provides a synchronous linkage armrest joint mechanism, aiming to solve the problem that the existing folding mechanism is inconvenient to synchronously fold the unlocked armrest.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a synchronously linked armrest joint mechanism, comprising a base, two upper armrest tubes, two lower armrest tubes and a linkage assembly, the base is provided with two movable holes, two rotating holes and a guide hole, one end of the two upper armrest tubes are rotatably connected to the movable holes and the rotating holes respectively through rivets, one end of the two lower armrest tubes are connected to the base and the linkage assembly through rivets, the linkage assembly comprises two cranks, one end of the two cranks are rotatably connected to the guide holes, and the other end of the two cranks are rotatably connected to the end portions of the two lower armrest tubes respectively through rivets.

[0006] Furthermore, the two movable holes and the two rotating holes are symmetrically arranged with respect to the guide hole.

[0007] Furthermore, a protrusion is provided at a bending portion of one side of the rotating hole close to the guide hole.

[0008] Furthermore, a U-shaped slot is provided at one end of the crank connected to the lower handrail tube, and the lower handrail tube is rotatably installed in the U-shaped slot.

[0009] Furthermore, an arc-shaped notch is provided at the bottom of the base, and the U-shaped slot is disposed in the arc-shaped notch.

[0010] Furthermore, a plurality of ribs are arranged on the crank.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model discloses a synchronous linkage armrest joint mechanism with a simple structure and a reasonable and ingenious design, comprising a base, two upper armrest tubes and two lower armrest tubes and a linkage assembly, wherein two movable holes, two rotating holes and a guide hole are provided on the base, one end of the two upper armrest tubes are rotationally connected to the movable hole and the rotating hole respectively by rivets, one end of the two lower armrest tubes are connected to the base and the linkage assembly by rivets, and the linkage assembly comprises two cranks, one end of the two cranks are rotationally connected to the guide hole, and the other ends of the two cranks are rotationally connected to the ends of the two lower armrest tubes respectively by rivets. When the armrest assembly needs to be folded, the two upper armrest tubes move horizontally toward the side away from each other, one end of the two cranks move vertically downward along the guide hole, and the other ends of the two cranks push the lower armrest tubes to rotate around the base connection point respectively, and at the same time, the upper armrest tubes synchronously follow and rotate along the movable hole and the rotating hole, thereby realizing synchronous folding of the armrests and solving the problem that the existing armrests are inconvenient to synchronously fold. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a synchronously linked armrest joint mechanism of the utility model;

[0015] Figure 2 It is a schematic diagram of the base structure of a synchronously linked armrest joint mechanism of the utility model;

[0016] Figure 3 It is a schematic diagram of the matching structure of an upper handrail tube, a lower handrail tube and a base of a synchronously linked handrail joint mechanism of the utility model;

[0017] Figure 4The utility model is a schematic diagram of a crank structure of a synchronously linked armrest joint mechanism.

[0018] Main component symbols

[0019] 10. base; 101. moving hole; 102. rotating hole; 103. guide hole; 104. upper handrail tube; 105. lower handrail tube; 106. protrusion; 107. arc-shaped notch;

[0020] 20. Crank; 201. U-shaped slot. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] Example

[0025] Reference Figure 1-4 As shown, the utility model discloses a synchronously linked armrest joint mechanism, including a base 10, two upper armrest tubes 104, two lower armrest tubes 105 and a linkage assembly, the base 10 is provided with two movable holes 101, two rotating holes 102 and a guide hole 103, one end of the two upper armrest tubes 104 is rotatably connected to the movable hole 101 and the rotating hole 102 respectively by rivets, and one end of the two lower armrest tubes 105 is connected to the base 10 and the linkage assembly by rivets. Specifically, one end of the upper handrail tube 104 is rotatably mounted on the movable hole 101 and the rotating hole 102 by two rivets, and the lower handrail tube 105 is rotatably mounted on the base 10 by rivets, wherein the two movable holes 101 and the two rotating holes 102 are symmetrically arranged about the guide hole 103. When folding the handrails, the upper handrail keys are moved toward the side away from each other. The symmetrically arranged two movable holes 101 and the two rotating holes 102 enable the rivets on the two upper handrail tubes 104 to synchronously follow the rotation in the two movable holes 101 and the two rotating holes 102, thereby realizing the synchronous folding of the upper handrail tubes 104.

[0026] Furthermore, a protrusion 106 is provided at the bend of the rotating hole 102 close to the guide hole 103. When the handrails on both sides are fully unfolded, the rivet on the upper handrail tube 104 moves along the rotating hole 102 to one end close to the guide hole 103, and the protrusion 106 better fixes the rivet of the upper handrail tube 104.

[0027] Reference Figure 1-4 As shown, the linkage assembly includes two cranks 20, one end of the two cranks 20 is rotatably connected to the guide hole 103, and the other end of the two cranks 20 is rotatably connected to the ends of the two lower handrail tubes 105 through rivets. Specifically, the two cranks 20 are arc-shaped, and a plurality of ribs are arranged on the cranks 20. Since the cranks 20 play the role of pulling and pushing the lower handrail tubes 105, the ribs make the cranks 20 have sufficient strength to prevent the cranks 20 from being damaged. A rivet passes through the guide hole 103 and passes through the overlapping part of one end of the two cranks 20. One end of the crank 20 can rotate around the rivet and move up and down along the guide hole 103. The other end of the crank 20 is rotatably connected to the lower handrail tube 105. A U-shaped groove 201 is set at the end of the crank 20 connected to the lower handrail tube 105. The lower handrail tube 105 is rotatably installed in the U-shaped groove 201. The rivet passes through the lower handrail tube 105 and is installed in the U-shaped groove 201. The lower handrail tube 105 can rotate in the U-shaped groove 201. The crank 20 can push the lower handrail tube 105 to rotate around the connection point with the base 10. The two cranks 20 simultaneously push the two handrail tubes to rotate, thereby realizing synchronous folding.

[0028] In addition, an arc-shaped notch 107 is opened at the bottom of the base 10, and the U-shaped slot 201 is placed in the arc-shaped notch 107. The arc-shaped notch provides an escape space for the U-shaped slot 201 to move, thereby preventing the base 10 from affecting the movement of the end of the crank 20 where the U-shaped slot 201 is set.

[0029] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A synchronously linked armrest joint mechanism, characterized in that; It includes a base, two upper handrail tubes, two lower handrail tubes and a linkage assembly, wherein the base is provided with two movable holes, two rotating holes and a guide hole, one end of the two upper handrail tubes are rotatably connected to the movable holes and the rotating holes respectively through rivets, one end of the two lower handrail tubes are connected to the base and the linkage assembly through rivets, and the linkage assembly includes two cranks, one end of the two cranks are rotatably connected to the guide holes, and the other end of the two cranks are rotatably connected to the end portions of the two lower handrail tubes respectively through rivets.

2. The synchronously linked armrest joint mechanism according to claim 1, characterized in that: The two moving holes and the two rotating holes are symmetrically arranged with respect to the guide hole.

3. The synchronously linked armrest joint mechanism according to claim 1, characterized in that: A protrusion is arranged at a bending portion of one side of the rotating hole close to the guide hole.

4. The synchronously linked armrest joint mechanism according to claim 1, characterized in that: A U-shaped slot is arranged at one end of the crank connected to the lower handrail tube, and the lower handrail tube is rotatably installed in the U-shaped slot.

5. The synchronously linked armrest joint mechanism according to claim 4, characterized in that: An arc-shaped notch is provided at the bottom of the base, and the U-shaped slot is arranged in the arc-shaped notch.

6. The synchronously linked armrest joint mechanism according to claim 1, characterized in that: A plurality of ribs are arranged on the crank.

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