Adjustable handrail

Abstract

The utility model provides an adjustable handrail which comprises a fixing support, a lifting frame capable of moving in the vertical direction is installed in the fixing support, a rotatable locking block is installed in the lifting frame, and the locking block can enable the lifting frame and the fixing support to achieve relative locking in the free state. A top block capable of sliding in the vertical direction relative to the lifting frame is further arranged in the lifting frame, and when the lifting frame moves to the upper limit position, the top block can drive the locking block to rotate so as to make contact with the locking state of the locking block; the top of the lifting frame is provided with a movable shell capable of moving in the horizontal direction. The armrest mechanism is reasonable in design structure and convenient to operate, the height adjustment of the armrest can be conveniently and quickly realized by adopting the structural design of the top block and the locking block, the horizontal position adjustment of the armrest can be met under the condition that the movable shell is driven in the horizontal direction, and the armrest mechanism has the advantages of low cost and low assembly difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of seat armrests, in particular to an adjustable armrest. Background Art

[0002] In order to improve the comfort of the seat, the existing seats are generally equipped with armrests to support the user's arms and improve the comfort of the seat. Generally, the existing seat armrests are mainly divided into fixed armrests and movable armrests, wherein the movable armrests can adjust the position of the armrests relative to the seat, so as to complete the folding and unfolding actions. However, most of the existing movable armrests are structures with a flip function, which only have the function of rotating relative to the hinge point position, and the height of the armrest and the horizontal support position of the armrest are not easy to adjust.

[0003] In order to solve the above problems, the Chinese utility model patent with application number 202122956727.5 discloses an armrest and a seat, wherein the armrest comprises: a base and an armrest body; a first gear and a second gear meshing with each other are rotatably provided on the base, and a first rack and a second rack parallel to each other are provided on the armrest body, the first rack meshes with the first gear, and the second rack meshes with the second gear, so that the armrest body can slide relative to the base. Although the above scheme achieves the effect of adjusting the armrest in the horizontal direction, on the one hand, its internal structure is complex, and there are problems of high cost and difficulty in assembly. On the other hand, it does not have the function of vertical lifting. Based on this, the inventor provides an armrest structure that can realize both horizontal adjustment of the armrest and vertical adjustment of the armrest. Utility Model Content

[0004] The utility model provides an adjustable armrest to solve the problems that the existing armrests proposed in the above background technology cannot realize adjustment in the horizontal direction and the vertical direction at the same time, and have complex structures, great difficulty in assembly and high costs.

[0005] The technical solution of the utility model is achieved in this way:

[0006] An adjustable armrest comprises a fixed bracket, a lifting frame capable of moving in a vertical direction is installed inside the fixed bracket, a rotatable locking block is installed inside the lifting frame, the locking block can relatively lock the lifting frame and the fixed bracket in a free state, a top block capable of sliding in a vertical direction relative to the lifting frame is also provided inside the lifting frame, when the lifting frame moves to an upper limit position, the top block can drive the locking block to rotate, thereby contacting the locking state of the locking block; a movable shell capable of moving in a horizontal direction is installed on the top of the lifting frame.

[0007] Preferably, the locking block is installed inside the lifting frame through a pin shaft, and a torsion spring is installed at the pin shaft for driving the locking block to tilt to one side. A tooth groove is provided at the lower end of the locking block, and an inner sleeve is fixed inside the fixed bracket. The inner wall of the inner sleeve has teeth meshing with the tooth groove. Under the action of the torsion spring, the locking block can make the tooth groove and the teeth cooperate to achieve locking of the lifting frame.

[0008] Preferably, a limiting groove is provided at the upper end of the locking block, guide plates are provided inside the lifting frame and at both sides above the locking block, guide grooves matching the guide plates are provided on both sides of the top block, the top block is slidably mounted on the guide plates, a window is provided on one side of the inner sleeve, the top block is slidably mounted in the window, when the top block moves to the upper limit position with the lifting frame, the top block can contact the upper edge of the window, and the lower end of the top block is inserted into the limiting groove on the locking block, so that the locking block is rotated and unlocked at the same time, and when the top block moves to the lower limit position with the lifting frame, the lower edge of the window contacts the top block, so that the lower end of the top block can be disengaged from the limiting groove, and the locking block returns to the locked state under the action of the torsion spring.

[0009] Preferably, a soft cushion is installed on the top of the movable housing.

[0010] Preferably, a top plate is installed on the top of the lifting frame, the movable shell is located above the top plate and can move horizontally relative to the top plate, and a horizontal limiting component for limiting the movable shell is installed inside the movable shell.

[0011] Preferably, the movable shell comprises a movable upper shell and a movable lower shell, and the movable upper shell is connected to the movable lower shell by a buckle.

[0012] Preferably, positioning grooves are provided on both sides of the inner wall of the movable lower shell, a limiting frame connected to the top plate is installed inside the movable lower shell, and both sides of the limiting frame have positioning protrusions protruding outwards and capable of matching with the positioning grooves.

[0013] Preferably, a fixing plate is installed above the limiting frame, and the fixing plate is connected to the top plate by bolts.

[0014] Preferably, a long hole is opened in the middle of the movable lower shell, and a convex strip in contact with the bottom surface of the limiting frame is provided at the bottom wall of the movable lower shell.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0016] The utility model has a reasonable design structure and is easy to operate. The structural design of the top block and the locking block can conveniently and quickly realize the height adjustment of the armrest. When the movable shell is driven in the horizontal direction, the horizontal position adjustment of the armrest can be met. It has the advantages of low cost and low assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0019] Figure 2 It is an exploded view of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 It is a partial exploded view of the lifting frame, top block, inner sleeve and locking block of the utility model;

[0022] Figure 5 This is the internal structure diagram of the mobile housing of the utility model;

[0023] Figure 6 It is a three-dimensional diagram of the locking block of the utility model;

[0024] Figure 7 It is a three-dimensional diagram of the top block of the utility model;

[0025] Figure 8 It is a three-dimensional diagram of the movable lower housing of the utility model;

[0026] Fig. 9 It is a three-dimensional diagram of the limiting frame of the utility model.

[0027] in:

[0028] 1. Fixed bracket; 2. Lifting frame; 201. Guide plate; 3. Lock block; 301. Limiting groove; 302. Tooth groove; 4. Pin shaft; 5. Top block; 501. Guide groove; 6. Inner sleeve; 601. Window; 602. Tooth; 7. Top plate; 8. Move lower shell; 801. Raised strip; 802. Long hole; 803. Positioning groove; 9. Limiting frame; 901. Positioning protrusion; 10. Fixed plate; 11. Move upper shell; 12. Cushion. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 9 An adjustable armrest comprises a fixed bracket 1, a lifting frame 2 capable of moving in a vertical direction is installed inside the fixed bracket 1, a rotatable locking block 3 is installed inside the lifting frame 2, the locking block 3 is installed inside the lifting frame 2 through a pin shaft 4, and a torsion spring for driving the locking block 3 to tilt to one side is installed at the pin shaft 4, the locking block 3 can relatively lock the lifting frame 2 and the fixed bracket 1 in a free state, wherein the free state of the locking block 3 refers to a state in which the locking block 3 only tilts to one side under the action of the torsion spring.

[0031] Specifically, a tooth groove 302 is provided at the lower end of the locking block 3, and an inner sleeve 6 is fixed inside the fixed bracket 1. In this example, the inner sleeve 6 is a sleeve structure composed of two brackets of a semi-shell structure, which is connected to the inner position of the fixed bracket 1 by clamping or bolting; the inner wall of the inner sleeve 6 has teeth 602 meshing with the tooth groove 302, and the locking block 3 can make the tooth groove 302 match the teeth 602 under the action of the torsion spring to achieve the locking of the lifting frame 2. Since the torsion spring applies an elastic force to the locking block 3, the tooth groove 302 of the locking block 3 matches the teeth 602 of the inner sleeve 6, so that the lifting frame 2 will not move downward relative to the fixed bracket 1 under the action of its own gravity, and when the lifting frame 2 moves upward, the tooth groove 302 can be clamped into the teeth 602 at different positions above, thereby achieving the height adjustment of the lifting frame 2.

[0032] The interior of the lifting frame 2 is also provided with a top block 5 that can slide vertically relative to the lifting frame 2. When the lifting frame 2 moves to the upper limit position, the top block 5 can drive the locking block 3 to rotate, thereby contacting the locking state of the locking block 3; the top of the lifting frame 2 is installed with a movable shell that can move in the horizontal direction.

[0033] Specifically, a limiting groove 301 is provided at the upper end of the locking block 3, guide plates 201 are provided inside the lifting frame 2 and at both sides above the locking block 3, guide grooves 501 matching the guide plates 201 are provided on both sides of the top block 5, the top block 5 is slidably installed on the guide plates 201, a window 601 is provided on one side of the inner sleeve 6, the top block 5 is slidably installed in the window 601, when the top block 5 moves to the upper limit position with the lifting frame 2, the top block 5 can contact with the upper edge of the window 601, and the lower end of the top block 5 is inserted into the limiting groove 301 on the locking block 3, so that the locking block 3 rotates and the locking block 3 is unlocked at the same time, when the top block 5 moves to the lower limit position with the lifting frame 2, the lower edge of the window 601 contacts with the top block 5, so that the lower end of the top block 5 can be disengaged from the limiting groove 301, and the locking block 3 is restored to the locked state under the action of the torsion spring.

[0034] Specifically, a soft pad 12 is installed on the top of the mobile housing for contacting the arm part of the human body to increase comfort.

[0035] Specifically, a top plate 7 is installed on the top of the lifting frame 2, the mobile shell is located above the top plate 7 and can move horizontally relative to the top plate 7, and a horizontal limiting component for limiting the mobile shell is installed inside the mobile shell.

[0036] Specifically, the mobile shell includes a mobile upper shell 11 and a mobile lower shell 8, and the mobile upper shell 11 is connected to the mobile lower shell 8 by a snap-fit. This arrangement can facilitate the installation and disassembly of the internal components of the mobile shell, and can also hide the internal components in the internal position of the entire mobile shell, thereby reducing the installation height of this part and saving space.

[0037] Specifically, positioning grooves 803 are provided on both sides of the inner wall of the movable lower shell 8, and a limiting frame 9 connected to the top plate 7 is installed inside the movable lower shell 8. Both sides of the limiting frame 9 have positioning protrusions 901 protruding outward and capable of matching with the positioning grooves 803. The outer periphery of the limiting frame 9 is a ring-shaped thin-walled structure made of plastic material, so that during the movement, the positioning protrusion 901 can pass between two adjacent positioning grooves 803 to produce local elastic deformation, thereby meeting the working requirements of horizontal movement and limitation.

[0038] Specifically, a fixing plate 10 is installed above the limiting frame 9 , and the fixing plate 10 is connected to the top plate 7 through bolts. The fixing plate 10 is installed on the top plate 7 with the bolts to limit the vertical movement of the limiting frame 9 .

[0039] Specifically, a long hole 802 is opened in the middle of the movable lower shell 8, and the width of the long hole 802 is smaller than the width of the limit frame 9 and the fixed plate 10. The long hole 802 is designed to have a giving effect, so that the movable shell can move horizontally relative to the limit frame 9. A convex strip 801 in contact with the bottom surface of the limit frame 9 is provided at the bottom wall position of the movable lower shell 8. The purpose of this arrangement is to reduce the friction resistance between the limit frame 9 and the movable lower shell 8, so that the user can save effort when adjusting the armrest horizontally.

[0040] Working principle: This adjustable armrest has the effect of height adjustment on the one hand, and has the function of adjusting the movable shell and the cushion 12 in the horizontal direction on the other hand.

[0041] When adjusting the height, the user only needs to hold the mobile shell and pull the lifting frame 2 upwards, and the locking block 3 inside the lifting frame 2 can cooperate with the teeth 602 at the inner wall position of the inner sleeve 6, so that the lifting frame 2 can be pulled to any height; when storing the lifting frame 2, it is only necessary to pull the lifting frame 2 to the upper limit position, so that the upper end of the top block 5 contacts the upper edge of the window 601. At this time, the top block 5 has a force to move downward, so that the lower edge of the top block 5 is inserted into the limiting groove 301 above the locking block 3, so that the tooth groove 302 is separated from the teeth 602, and the locking block 3 is unlocked. In this state, the user can move the lifting frame 2 downward to the lower limit position. When reaching the lower limit position, the lower end of the top block 5 can contact the upper edge of the window 601, driving the top block 5 to move upward, so that the edge of the top block 5 is separated from the limiting groove 301, and the locking block 3 continues to tilt to one side under the force of the torsion spring, so that the tooth groove 302 and the teeth 602 cooperate, and the locking state is restored.

[0042] When adjusting the horizontal direction, the user only needs to push the movable housing forward and backward to insert the positioning protrusions 901 on the limiting frame 9 into the positioning grooves 803 at different positions to achieve the purpose of horizontal adjustment.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable armrest, characterized in that: The invention comprises a fixed support (1), wherein a lifting frame (2) capable of moving in a vertical direction is installed inside the fixed support (1), a rotatable locking block (3) is installed inside the lifting frame (2), and the locking block (3) can relatively lock the lifting frame (2) and the fixed support (1) in a free state, and a top block (5) capable of sliding in a vertical direction relative to the lifting frame (2) is also provided inside the lifting frame (2), and when the lifting frame (2) moves to an upper limit position, the top block (5) can drive the locking block (3) to rotate, thereby contacting the locking state of the locking block (3); a movable shell capable of moving in a horizontal direction is installed on the top of the lifting frame (2).

2. An adjustable armrest according to claim 1, characterized in that: The locking block (3) is installed inside the lifting frame (2) via a pin shaft (4), and a torsion spring is installed at the pin shaft (4) for driving the locking block (3) to tilt to one side. A tooth groove (302) is provided at the lower end of the locking block (3). An inner sleeve (6) is fixed inside the fixed bracket (1), and the inner wall of the inner sleeve (6) has teeth (602) meshing with the tooth groove (302). Under the action of the torsion spring, the locking block (3) can make the tooth groove (302) match with the teeth (602) to achieve locking of the lifting frame (2).

3. An adjustable armrest according to claim 2, characterized in that: A limiting groove (301) is provided at the upper end of the locking block (3); guide plates (201) are provided inside the lifting frame (2) and at both sides above the locking block (3); guide grooves (501) matching the guide plates (201) are provided on both sides of the top block (5); the top block (5) is slidably mounted on the guide plates (201); a window (601) is provided on one side of the inner sleeve (6); the top block (5) is slidably mounted in the window (601); when the top block (5) moves with the lifting frame (2), the lifting frame (2) moves upward. When the top block (5) moves to the upper limit position, the top block (5) can contact the upper edge of the window (601), and the lower end of the top block (5) is inserted into the limiting groove (301) on the locking block (3), so that the locking block (3) is rotated and unlocked at the same time; when the top block (5) moves to the lower limit position with the lifting frame (2), the lower edge of the window (601) contacts the top block (5), so that the lower end of the top block (5) can be disengaged from the limiting groove (301), and the locking block (3) is restored to the locked state under the action of the torsion spring.

4. The adjustable armrest according to claim 1, characterized in that: A soft cushion (12) is installed on the top of the mobile housing.

5. The adjustable armrest according to claim 1, characterized in that: A top plate (7) is installed on the top of the lifting frame (2); the movable shell is located above the top plate (7) and can move horizontally relative to the top plate (7); and a horizontal limit assembly for limiting the position of the movable shell is installed inside the movable shell.

6. An adjustable armrest according to claim 5, characterized in that: The movable housing comprises a movable upper housing (11) and a movable lower housing (8), and the movable upper housing (11) and the movable lower housing (8) are connected via a buckle.

7. An adjustable armrest according to claim 6, characterized in that: Positioning grooves (803) are provided on both sides of the inner wall of the movable lower shell (8), and a limiting frame (9) connected to the top plate (7) is installed inside the movable lower shell (8), and both sides of the limiting frame (9) have positioning protrusions (901) protruding outwards and capable of matching with the positioning grooves (803).

8. An adjustable armrest according to claim 7, characterized in that: A fixing plate (10) is installed above the limiting frame (9), and the fixing plate (10) is connected to the top plate (7) via bolts.

9. An adjustable armrest according to claim 8, characterized in that: A long hole (802) is provided in the middle of the movable lower shell (8), and a convex strip (801) in contact with the bottom surface of the limiting frame (9) is provided at the bottom wall of the movable lower shell (8).

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