Front-back adjusting mechanism of seat armrest and seat

Abstract

The utility model discloses a front-back adjusting mechanism of a seat armrest and a seat. The front-back adjusting mechanism of the seat armrest comprises the armrest, a bracket and a locking piece, the handrail is mounted on the bracket in a sliding manner; a plurality of clamping grooves are formed in the handrail and are sequentially arranged along the relative movement direction of the handrail and the bracket; the locking piece comprises a locking block pivoted to the support and a driving part, the locking block is provided with a lock head matched with the clamping groove, and the driving part is used for driving the locking block to rotate relative to the support between the first position and the second position. The lock head is clamped in one of the clamping grooves and is combined with the clamping groove to limit the degree of freedom of the armrest moving back and forth relative to the bracket; when the locking block is located at the second position, the lock head is separated from the clamping groove combined with the lock head. The front and back positions of the armrest can be rapidly and conveniently adjusted, when the armrest is subjected to external force, the lock head is not prone to being separated from the clamping groove, and the armrest can stably support the arm of a user.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a front-rear adjustment mechanism for a seat armrest and a seat. Background Art

[0002] The armrests of traditional chairs are fixedly matched with the chair body, and can only provide good support for the user's hands in a single sitting posture. After the user changes the sitting posture, it is difficult to find a more comfortable arm support posture.

[0003] In order to overcome the above-mentioned defects of traditional chairs, some existing children's chairs and gaming chairs have adjustable armrests installed on the seat body, so that the armrests can be moved forward and backward and remain relatively fixed with the seat body, and then the armrests can better support the user's arms in different sitting postures. Although the existing chairs can adjust the armrest position forward and backward, in order to ensure that the armrest remains relatively fixed with the seat body after being adjusted into place, a damping structure needs to be set between the armrest and the seat body. Although the damping structure can keep the armrest fixed with the seat body after the armrest is adjusted into place, when the armrest is moved, the large resistance generated by the damping structure causes a large external force to be applied when adjusting the armrest, and adjusting the armrest position is time-consuming and labor-intensive, which is extremely inconvenient.

[0004] In addition, it is difficult for the damping structure to provide a large supporting force value. During the use of the seat, the fixing state of the armrest and the seat body is unstable, and it is often difficult to provide relatively stable support for the user's arms. Utility Model Content

[0005] The utility model aims to provide a front-to-back adjustment mechanism for a chair armrest and a chair, which can facilitate the front-to-back adjustment of the armrest and better lock the armrest after the adjustment is completed, so that the armrest can stably support the user's arm.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A front and rear adjustment mechanism for a seat armrest, comprising an armrest, a bracket mounted on the seat, and a locking member;

[0008] The armrest is slidably mounted on the bracket so that the armrest can move forward and backward relative to the bracket; a plurality of card slots are arranged on the armrest, and the plurality of card slots are arranged in sequence along the direction of relative movement between the armrest and the bracket;

[0009] The locking member includes a locking block pivotally connected to the bracket and a driving part. The locking block is provided with a locking head matching the card slot. The driving part is used to drive the locking block to rotate relative to the bracket between a first position and a second position. When the locking block is in the first position, the locking head is clamped in one of the card slots and combined with the card slot to limit the freedom of the armrest to move forward and backward relative to the bracket; when the locking block is in the second position, the locking head is disengaged from the card slot combined with it.

[0010] Preferably, the locking block is cylindrical, the locking head is located on the outer edge surface of the locking block, and the driving part is rod-shaped, one end of which is connected to the outer edge surface of the locking block and the other end extends to the outside of the bracket.

[0011] Preferably, a limiting groove is provided on the bracket, and the driving part is inserted into the limiting groove and can slide between two ends of the limiting groove.

[0012] Preferably, a slide groove extending forward and backward is provided on the armrest, and a sliding part embedded in the slide groove and capable of sliding along the extending direction of the slide groove is provided on the bracket.

[0013] Preferably, the armrest includes a top wall and a vertical wall extending downward from the lower surface of the top wall, the upper surface of the top wall forms an arm support surface, a slide groove is provided on the vertical wall, and the sliding part includes more than two sliding columns staggered along the extension direction of the slide groove.

[0014] Preferably, the bracket includes an outer bracket and an inner bracket located inside the outer bracket and detachably fixed to the outer bracket, a limiting groove is formed between the inner bracket and the outer bracket, and the vertical wall of the handrail is slidably embedded in the limiting groove.

[0015] Preferably, the slide groove is opened on the outer side surface of the vertical wall, and the slide groove includes a through groove that passes through the inner and outer sides of the vertical wall. The two sliding columns are connected to the outer bracket, and the outer bracket is also connected to a connecting column that is slidably embedded in the through groove. The connecting column is fixed with a blocking piece that abuts against the inner side surface of the vertical wall.

[0016] Preferably, an axle head is provided on the inner bracket, an axle hole opposite to the axle head is provided on the outer bracket, one end of the locking block is inserted into the axle hole, a connecting hole is provided on the end surface of the other end of the locking block, the axle head is inserted into the connecting hole and pivotally cooperates with the locking block.

[0017] Preferably, a plurality of slots are arranged at the lower edge of the vertical wall, and the width of the slots gradually decreases from bottom to top.

[0018] A seat, comprising the fore-and-aft adjustment mechanism of the seat armrest.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model drives the lock block to rotate by the driving part on the locking member, so that the lock head on the lock block can be combined with the card slot, or disengaged from the card slot, so as to realize locking and unlocking of the armrest, so that the front and rear positions of the armrest can be adjusted quickly and conveniently. After the position adjustment of the armrest is completed, the armrest and the bracket are relatively fixed by clamping the lock head into the corresponding card slot on the armrest. Through the combination of the lock head and the card slot, the armrest can be stably fixed on the bracket. When the armrest is subjected to external force, the lock head is not easy to disengage from the card slot, so that the armrest can more stably support the user's arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 for Figure 2 The enlarged view of the A in the figure illustrates a usage state of the utility model;

[0024] Figure 4 This is another schematic diagram of the use state of the utility model;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the middle bracket;

[0026] Figure 6 for Figure 5 Schematic diagram of the structure of the middle and outer brackets.

[0027] Among them: 10, handrail; 11, top wall; 12, vertical wall; 121, slide groove; 122, through groove; 13, card slot; 200, bracket; 20, outer bracket; 22, sliding column; 23, connecting column; 231, baffle; 24, limit groove; 25, shaft hole; 30, inner bracket; 31, shaft head; 40, locking piece; 41, locking block; 42, driving rod; 43, locking head. DETAILED DESCRIPTION

[0028] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary 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 this application can be understood according to specific circumstances.

[0031] like Figure 1 , 2 , 3, 4, 5, and 6 show a front-to-back adjustment mechanism for a seat armrest of the present invention, which includes an armrest 10, a bracket 200, and a locking member 40. The bracket 200 is fixedly connected to the seat body, and the armrest 10 is slidably mounted on the bracket 200 so that the armrest 10 can move forward and backward relative to the bracket 200, that is, the armrest 10 can move forward and backward relative to the seat body. A plurality of card slots 13 are provided on the armrest 10, and the plurality of card slots 13 are sequentially arranged along the direction of relative movement between the armrest 10 and the bracket 200; the locking member 40 includes a locking block 41 and a driving portion, and a locking head 43 matching the shape of the card slot 13 is provided on the locking block 41, and the locking block 41 is pivotally connected to the bracket 200, and the driving portion The movable part can drive the locking block 41 to rotate relative to the bracket 200 between the first position and the second position. When the locking block 41 is in the first position, the locking head 43 on the locking block 41 is clamped in one of the slots 13. In this way, the locking head 43 is combined with one of the slots 13 to limit the freedom of the armrest 10 to move forward and backward relative to the bracket 200; when the locking block 41 is in the second position, the locking head 43 and the slot 13 combined therewith are disengaged, and the locking head 43 and the slot 13 no longer limit the freedom of the armrest 10 to move forward and backward relative to the bracket 200. At this time, the armrest 10 can be moved forward and backward according to the sliding matching structure of the armrest 10 and the bracket 200 to achieve the purpose of adjusting the front and rear position of the armrest 10.

[0032] In the utility model, the driving part on the locking member 40 drives the lock block 41 to rotate, so that the lock head 43 on the lock block 41 can be combined with the card slot 13, or disengaged from the card slot 13, so as to realize locking and unlocking of the armrest 10, so that the front and rear positions of the armrest 10 can be adjusted quickly and conveniently. After the position adjustment of the armrest 10 is completed, the armrest 10 and the bracket 200 are relatively fixed by inserting the lock head 43 into the corresponding card slot 13 on the armrest 10. Through the combination of the lock head 43 and the card slot 13, the armrest 10 can be stably fixed on the bracket 200. When the armrest 10 is subjected to external force, the lock head 43 is not easy to disengage from the card slot 13, so that the armrest 10 can more stably support the user's arm.

[0033] The locking block 41 is columnar, and the locking head 43 is located on the outer edge surface of the locking block 41, that is, the locking head 43 extends from the outer edge surface of the locking block 41 in a direction away from the central axis of the locking block 41, and the driving part is rod-shaped, that is, the driving part is a driving rod 42, one end of the driving rod 42 is connected to the outer edge surface of the locking block 41, and the other end extends to the outside of the bracket 200. By moving the driving rod 42, the locking block 41 can be driven to rotate between the first position and the second position. The bracket 200 is provided with a limiting groove 24, and the driving rod 42 is connected to the limiting groove 24, that is, the driving rod 42 passes through the limiting groove 24 to the outside of the bracket 200, and the part of the driving rod 42 exposed outside the bracket 200 forms a toggle end, so that the driving rod 42 can be operated outside the bracket 200, and then the locking block 41 is driven to rotate, and the driving rod 42 slides between the two ends of the limiting groove 24. When it is necessary to rotate the locking block 41 from the second position to the first position, the driving rod 42 slides from one end of the limiting groove 24 to the other end. At this time, the lock head 43 on the locking block 41 It is embedded in one of the slots 13, and the swing angle of the driving rod 42 is limited by the limit groove 24 to prevent the driving rod 42 from being excessively rotated, which would cause the lock head 43 and the inner wall surface of the slot 13 to be excessively squeezed, thereby protecting the lock head 43 and the slot 13; in addition, the driving rod 42 is extended to the outside of the bracket 200, so that the outer end of the driving rod 42 is set at a certain distance from the rotation axis of the lock block 41, so that the driving rod 42 has a relatively large force arm when driving the lock block 41 to rotate. In this way, only a small force needs to be applied to rotate the driving rod 42.

[0034] A slide groove 121 extending forward and backward is provided on the armrest 10, and a sliding part embedded in the slide groove 121 is provided on the bracket 200. The sliding part can slide along the extension direction of the slide groove 121, and then the armrest 10 is slidably installed on the bracket 200. The armrest 10 includes a top wall 11, a vertical wall 12 extending downward from the lower surface of the top wall 11, and the upper surface of the top wall 11 forms an arm support surface for supporting the user's arm. The slide groove 121 is provided on the vertical wall 12, and the sliding part includes two sliding columns 22 staggered along the extension direction of the slide groove 121, and the two sliding columns 22 are slidably embedded in the slide groove 121. The bracket 200 includes an outer bracket 20 and an inner bracket 30. The inner bracket 30 is located on the inner side of the outer bracket 20, and the inner bracket 30 and the outer bracket 20 are fixedly connected together in a detachable manner. A limiting groove is formed between the inner bracket 30 and the outer bracket 20. Specifically, a notch extending from top to bottom is respectively arranged on the opposite surfaces of the inner bracket 30 and the outer bracket 20. After the inner bracket 30 and the outer bracket 20 are fixedly connected together, the notches on the two together form a limiting groove. The vertical wall 12 of the handrail 10 is slidably embedded in the limiting groove. The two sliding columns 22 mentioned above can be horizontally arranged in the limiting groove. Specifically, the sliding groove 121 is opened on the outer side surface of the vertical wall 12, and the two sliding columns 22 are connected to the outer bracket 20. The outer bracket 20 is made of plastic material. The sliding column 22 can be connected to the inner side surface of the outer bracket 20 in an integrated manner. During assembly, the outer bracket 20 is placed on the outer side of the vertical wall 12, and the sliding column 22 is embedded in the sliding groove 121. Then, the inner bracket 30 is placed on the inner side of the vertical wall 12 and the inner bracket 30 and the outer bracket 20 are fixedly connected together. In this way, the vertical wall 12 can be embedded in the limiting groove between the inner bracket 30 and the outer bracket 20. At the same time, the two sliding columns 22 are slidably embedded in the sliding groove 121. The limiting groove and the vertical wall 12 cooperate to limit the freedom of relative movement of the bracket 200 and the armrest 10 in the lateral direction. The sliding column 22 and the sliding groove 121 cooperate to limit the freedom of relative movement of the bracket 200 and the armrest 10 in the height direction, so as to prevent the armrest 10 from detaching from the bracket 200 in the lateral and height directions. Therefore, according to the cooperation between the sliding column 22 and the sliding groove 121, the armrest 10 has the freedom to stably slide relative to the bracket 200 in the front and rear directions.In order to further prevent the handrail 10 from detaching from the bracket 200, the two sliding columns 22 can stably slide inside the slide groove 121, and the slide groove 121 includes a through groove 122 that penetrates the inner and outer sides of the vertical wall 12. Specifically, a section in the middle of the length direction of the slide groove 121 is set as the through groove 122, and a connecting column 23 slidably embedded in the through groove 122 is provided on the outer bracket 20. A blocking piece 231 is fixed on the connecting column 23, and the blocking piece 231 abuts against the inner side of the vertical wall 12. When assembling, the outer bracket 20 is placed in the vertical On the outer surface of the wall 12, the connecting column 23 is passed through the through slot 122, and then the blocking piece 231 is fixed to the connecting column 23 by means of screws, so that the blocking piece 231 is pressed against the inner side surface of the vertical wall 12. In this way, the vertical wall 12 is confined between the outer bracket 20 and the blocking piece 231, further preventing the armrest 10 from being separated from the bracket 200. In addition, the connecting column 23 slides in the through slot 122 to provide guidance for the forward and backward sliding of the armrest 10, and the connecting column 23 slides between the two ends of the through slot 122 to limit the maximum forward and backward movement of the armrest 10.

[0035] In other embodiments, the number of sliding posts 22 is not limited to the two mentioned above, and more than two sliding posts 22 may be provided on the outer bracket 20 and staggered in the extension direction of the slide groove 121. A larger number of sliding posts 22 form more supporting points between the outer bracket 20 and the armrest 10, making the sliding cooperation between the armrest 10 and the bracket 200 more stable. Of course, in other embodiments, the sliding part is not limited to providing more than two sliding posts 22, and it may also be a rib provided on the outer bracket 20 and the inner bracket 30, the width of the rib being equivalent to the width of the slide groove 121, the rib being slidably embedded in the slide groove 121, and the rib being set to an appropriate length so that it can slide stably in the slide groove 121.

[0036] An axis head 31 is provided on the inner bracket 30, and an axis hole 25 is provided on the outer bracket 20. The axis hole 25 is arranged opposite to the axis head 31. One end of the locking block 41 is inserted into the axis hole 25, and a connecting hole is provided on the other end surface of the locking block 41. The axis head 31 is inserted into the connecting hole and the axis head 31 and the locking block 41 are pivotally matched. During assembly, the outer bracket 20 is placed on the outer side of the vertical wall 12, so that one end of the locking block 41 is inserted into the axis hole 25, and then the inner bracket 30 is aligned with the outer bracket 20 for connection, so that the axis head 31 on the inner bracket 30 is inserted into the connecting hole of the locking block 41, the inner bracket 30 is fixed to the outer bracket 20, and then the locking block 41 is pivotally connected to the bracket 200.

[0037] In the present invention, a plurality of slots 13 are arranged at the lower edge of the vertical wall 12, and the width of the slots 13 gradually decreases from bottom to top, so that the slots 13 form a V-shaped structure, and the cross-sectional shape of the lock head 43 is V-shaped matching the shape of the slots 13. Figure 3When the armrest 10 is in the first position shown, the lock head 43 is stuck in the slot 13 to limit the freedom of movement of the armrest 10 forward and backward. When the front and rear position of the armrest 10 needs to be adjusted, the driving rod 42 is pushed downward to drive the lock block 41 to rotate to the second position. The lock block 41 and the armrest 10 are both plastic parts. When the lock block 41 rotates, the lock head 43 squeezes the inner wall of the slot 13, so that the lock head 43 and the inner wall of the slot 13 produce a certain slight deformation. In addition, according to the slight matching clearance between the sliding column 22 and the sliding groove 121, the armrest 10 is lifted upward by a slight distance relative to the lock block 41, so that when the driving rod 42 drives the lock block 41 to rotate, the lock head 43 can be disengaged from the slot 13 to allow the lock block 41 to rotate to the second position. Figure 4 In the second position shown, the lock head 43 is no longer engaged with the slot 13, and the armrest 10 can be moved forward and backward. When the armrest 10 is adjusted into place, the drive rod 42 is pushed upward to rotate the lock head 43 to the corresponding slot 13 on the armrest 10, and the armrest 10 and the bracket 200 are locked again.

[0038] The seat of the utility model includes the fore-and-aft adjustment mechanism of the seat armrests. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0039] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. The front and rear adjustment mechanism of the seat armrest is characterized by: including an armrest, a bracket mounted on a seat, and a locking member; The armrest is slidably mounted on the bracket so that the armrest can move forward and backward relative to the bracket; a plurality of card slots are arranged on the armrest, and the plurality of card slots are arranged in sequence along the direction of relative movement between the armrest and the bracket; The locking member includes a locking block pivotally connected to the bracket and a driving part. The locking block is provided with a locking head matching the card slot. The driving part is used to drive the locking block to rotate relative to the bracket between a first position and a second position. When the locking block is in the first position, the locking head is clamped in one of the card slots and combined with the card slot to limit the freedom of the armrest to move forward and backward relative to the bracket; when the locking block is in the second position, the locking head is disengaged from the card slot combined with it.

2. The front-rear adjustment mechanism of the seat armrest according to claim 1, characterized in that: The locking block is cylindrical, the locking head is located on the outer edge surface of the locking block, and the driving part is rod-shaped, one end of which is connected to the outer edge surface of the locking block and the other end extends to the outside of the bracket.

3. The front-rear adjustment mechanism of the seat armrest according to claim 2, characterized in that: The bracket is provided with a limiting groove, and the driving part is inserted into the limiting groove and can slide between the two ends of the limiting groove.

4. The front-rear adjustment mechanism of the seat armrest according to claim 1, characterized in that: A sliding groove extending forward and backward is arranged on the armrest, and a sliding part which is embedded in the sliding groove and can slide along the extending direction of the sliding groove is arranged on the bracket.

5. The front-rear adjustment mechanism of the seat armrest according to claim 4, characterized in that: The armrest includes a top wall and a vertical wall extending downward from the lower surface of the top wall, the upper surface of the top wall forms an arm support surface, a slide groove is arranged on the vertical wall, and the sliding part includes more than two sliding columns staggered along the extension direction of the slide groove.

6. The front-rear adjustment mechanism of the seat armrest according to claim 5, characterized in that: The bracket comprises an outer bracket and an inner bracket which is located inside the outer bracket and detachably fixed to the outer bracket. A limiting groove is formed between the inner bracket and the outer bracket, and the vertical wall of the handrail is slidably embedded in the limiting groove.

7. The front-rear adjustment mechanism of the seat armrest according to claim 6, characterized in that: The slide groove is opened on the outer side of the vertical wall, and the slide groove includes a through groove that runs through the inner and outer sides of the vertical wall. The two sliding columns are connected to the outer bracket, and the outer bracket is also connected to a connecting column that is slidably embedded in the through groove. A blocking piece that abuts against the inner side of the vertical wall is fixed on the connecting column.

8. The front-rear adjustment mechanism of the seat armrest according to claim 6, characterized in that: The inner bracket is provided with an axis head, the outer bracket is provided with an axis hole facing the axis head, one end of the locking block is connected in the axis hole, and a connecting hole is provided on the end surface of the other end of the locking block, the axis head is connected in the connecting hole and pivotally cooperates with the locking block.

9. The front-rear adjustment mechanism of the seat armrest according to claim 5, characterized in that: A plurality of slots are arranged at the lower edge of the vertical wall, and the width of the slots gradually decreases from bottom to top.

10. A seat, characterized in that: A front-rear adjustment mechanism for a seat armrest comprising any one of claims 1-9.

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