Seat armrest with locking mechanism

Abstract

The utility model relates to the technical field of seat armrests, and discloses a seat armrest with a locking mechanism, which comprises an armrest plate and a support rod, the armrest plate comprises a base and a panel, a mounting seat is arranged in the base, the mounting seat is provided with a mounting groove and a sliding groove, and a communication groove is arranged between the mounting groove and the sliding groove. A connecting block rotating around the first axis is rotationally connected into the mounting groove, a plurality of locking grooves evenly distributed around the first axis are formed in the side, close to the communicating groove, of the connecting block, a locking block is arranged in the communicating groove, the locking block extends out of the communicating groove to be matched with one locking groove, and an unlocking block capable of sliding in the longitudinal direction is arranged in the sliding groove. An unlocking groove is formed in the side, close to the mounting groove, of the unlocking block, a key block capable of moving in the longitudinal direction is arranged on the longitudinal side of the base and connected with the unlocking block, and a connecting column is arranged at the top of the supporting rod and penetrates through the bottom of the base and the bottom of the mounting base to be fixedly connected with the mounting block. The utility model has the advantages of simple operation and stable structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair armrest technical field, in particular to a kind of chair armrest with locking mechanism. BACKGROUND

[0002] As an important part of seat design, chair armrest provides elbow support and reduces muscle fatigue caused by long time sitting. With the improvement of people's living standards, people have higher and higher requirements for the comfort of chair armrest. The existing chair armrest can generally adjust its position to meet the use requirements of people. However, some adjustable chair armrests do not have locking mechanism. They mainly rely on the assembly tightness of adjusting structure to prevent the armrest from being adjusted randomly. The structure is not stable and may move accidentally when subjected to a large force. SUMMARY

[0003] The utility model provides a kind of chair armrest with locking mechanism, which is simple and easy to operate and has stable structure.

[0004] To solve the above technical problems, the utility model provides a kind of chair armrest with locking mechanism, including armrest plate and support rod, the armrest plate includes base and panel covered on the base, the base is equipped with mounting seat, the top of the mounting seat is equipped with mounting groove and sliding groove, the mounting groove is located on the transverse side of the sliding groove, the mounting groove and the sliding groove are equipped with the communication groove communicated with the mounting groove and the sliding groove groove respectively, the mounting groove is rotatably connected with the connecting block rotating around the first axis, the side of the connecting block close to the communication groove is equipped with a plurality of locking grooves uniformly distributed around the first axis, the communication groove is matched with locking block, the locking block extends out of the communication groove and cooperates with one of the locking grooves, the sliding groove is equipped with unlocking block capable of sliding along the longitudinal direction, the side of the unlocking block close to the mounting groove is equipped with unlocking groove, when the position of the unlocking groove corresponds to the position of the locking groove, the locking block can be separated from the locking groove and embedded in the unlocking groove, the longitudinal side of the base is equipped with key block capable of moving along the longitudinal direction, the key block is connected with the unlocking block, the top of the support rod is equipped with connecting column, the connecting column passes through the bottom of the base and the bottom of the mounting seat and is fixedly connected with the connecting block.

[0005] As a preferred scheme of the utility model, the side of the mounting groove away from the communication groove is equipped with positioning groove uniformly distributed around the first axis, the curvature between adjacent two positioning grooves is consistent with the curvature between adjacent two locking grooves, the side of the connecting block away from the locking groove is equipped with elastic member, and the elastic member cooperates with one of the positioning grooves.

[0006] As a preferred scheme of the utility model, one side of the connecting block away from the locking groove is equipped with the connecting groove arranged along the transverse direction, the elastic component includes the locating block and the locating spring, the locating block is connected with the connecting groove slidingly, the locating block extends out of the connecting groove and cooperates with one of the locating grooves, the locating spring is arranged along the transverse direction and is arranged between the locating block and the side wall of the mounting groove.

[0007] As a preferred scheme of the utility model, the base is equipped with the adjusting groove arranged along the transverse direction, the mounting seat is slidingly cooperated with the adjusting groove, the bottom of the adjusting groove is equipped with the through groove arranged along the transverse direction, the connecting column passes through the through groove and the bottom of the mounting seat and is fixedly connected with the connecting block.

[0008] As a preferred scheme of the utility model, the base is equipped with the connecting frame capable of moving along the longitudinal direction, the connecting frame includes the vertical plate and the horizontal plate fixedly connected, the vertical plate is arranged on the side of the adjusting groove close to the key block and is connected with the key block, the horizontal plate is equipped with the guide strip arranged along the transverse direction on the bottom of the side close to the unlocking block, and the top of the unlocking block is equipped with the guide groove slidingly cooperated with the guide strip.

[0009] As a preferred scheme of the utility model, the reset spring is arranged between the vertical plate and the side wall of the adjusting groove.

[0010] As a preferred scheme of the utility model, the side of the adjusting groove close to the key block is equipped with a plurality of locking tooth grooves arranged along the transverse direction, and the side of the unlocking block is equipped with the locking tooth cooperated with the locking tooth groove.

[0011] As a preferred scheme of the utility model, the cover of the adjusting groove is equipped with the locking cover, the top of the locking cover is equipped with the containing groove, the side of the containing groove close to the key block is equipped with a plurality of locking tooth grooves arranged along the transverse direction, the top of the unlocking block is equipped with the locking boss extending into the containing groove, and the locking boss is equipped with the locking tooth cooperated with the locking tooth groove.

[0012] As a preferred scheme of the utility model, the longitudinal two sides of the unlocking groove are respectively equipped with the guide inclined surface, and the guide inclined surface gradually approaches the unlocking groove along the direction away from the mounting groove.

[0013] As a preferred scheme of the utility model, the bottom of the mounting seat is equipped with the connecting hole, the axis of the connecting hole is the first axis, the bottom of the connecting block is equipped with the connecting boss rotationally connected with the connecting hole, and the connecting column is fixedly connected with the connecting boss through the bottom of the base.

[0014] The utility model discloses an embodiment of a seat armrest with locking mechanism compares with prior art, and its beneficial effect lies in: under normal circumstances, locking block is in the intercommunication groove and cooperates with locking groove, and the intercommunication groove is dislocated with the unlocking groove, under the cooperation of locking block and locking groove, the armrest plate is in the locking state in the rotation direction, when needing rotation adjustment, press the key block, make unlocking block move along the longitudinal direction, when the position of unlocking groove and the position of intercommunication groove are aligned, rotate the base, and locking block no longer cooperates with locking groove, and the armrest plate is in the unlocking state in the rotation direction, thereby can rotate and adjust the position of armrest plate, after adjusting, reset key block and unlocking block, and locking block will return to the position of cooperating with locking groove, make the armrest plate return to the locking state in the rotation direction, prevent accidental rotation of armrest plate, the utility model is simple to operate, and the structure is stable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure diagram of the utility model;

[0016] Figure 2 It is the broken structure diagram of the utility model;

[0017] Figure 3 It is the structure diagram of the armrest plate of the utility model and the panel is omitted;

[0018] Figure 4 It is Figure 3 The structure diagram of the locking cover is omitted;

[0019] Figure 5 It is the structure diagram of the base of the utility model;

[0020] Figure 6 It is the structure diagram of the mounting seat of the utility model;

[0021] Figure 7 It is the structure diagram of the connecting block of the utility model;

[0022] Figure 8 It is the structure diagram of the unlocking block of the utility model;

[0023] Figure 9 It is the structure diagram of the unlocking block and the connecting frame connection of the utility model;

[0024] Figure 10 It is the internal structure diagram of the armrest plate of another embodiment of the utility model;

[0025] Figure 11 It is Figure 10 The structure diagram of the connecting frame is omitted;

[0026] Figure 12 It is Figure 10 The structure of unlocking block in

[0027] In the figure, 1, base; 11, adjusting groove; 111, locking tooth groove; 112, locking cover; 113, containing groove; 12, through groove; 2, mounting seat; 21, mounting groove; 211, positioning groove; 212, connecting hole; 22, sliding groove; 23, communicating groove; 3, connecting block; 31, locking groove; 32, connecting groove; 33, connecting boss; 4, locking block; 5, unlocking block; 51, unlocking groove; 511, guide inclined surface; 52, guide groove; 53, locking tooth; 54, locking boss; 6, key block; 7, connecting column; 8, elastic member; 81, positioning block; 82, positioning spring; 9, connecting frame; 91, vertical plate; 92, horizontal plate; 921, guide strip; 93, reset spring; 100, handrail plate; 200, supporting rod. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0029] In the description of the present application, it should be understood that the present application uses the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like to indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0030] As Figures 1-9The utility model discloses a seat armrest with locking mechanism, including armrest plate 100 and support rod 200, armrest plate 100 includes base 1 and the panel of cover setting on base 1, be equipped with mounting seat 2 in base 1, the top of mounting seat 2 is equipped with installation groove 21 and sliding groove 22, installation groove 21 is located in the transverse one side of sliding groove 22, be equipped with the communication groove 23 of respectively with installation groove 21 and sliding groove 22 groove intercommunication between installation groove 21 and sliding groove 22, the rotatable connection of installation groove 21 is surrounded first axis rotation's connecting block 3, and the side of connecting block 3 near communication groove 23 is equipped with the multiple locking slots 31 of uniform distribution around first axis, and the matching locking block 4 of communication groove 23 is equipped with, and locking block 4 projects communication groove 23 outside and cooperates with one of locking slots 31, namely the position of this locking slot 31 corresponds with the position of communication groove 23, and the unlocking block 5 of being able to slide along longitudinal direction is equipped with in sliding groove 22, namely unlocking block 5 is slidably connected with sliding groove 22 in longitudinal direction, and the side of unlocking block 5 near installation groove 21 is equipped with unlocking slot 51, when the position of unlocking slot 51 corresponds with the position of locking slot 31, locking block 4 can separate locking slot 31 and embed in unlocking slot 51, and the longitudinal one side of base 1 is equipped with the button block 6 of being able to move along longitudinal direction, in this embodiment, the longitudinal one side of base 1 is equipped with the opening groove of setting along longitudinal direction, and button block 6 and the opening groove slidably connected and extend into base 1, and button block 6 is connected with unlocking block 5, and button block 6 can drive unlocking block 5 together along longitudinal direction moves, and the top of support rod 200 is equipped with connecting column 7, and connecting column 7 passes through the bottom of base 1 and the bottom of mounting seat 2 and is fixedly connected with connecting block 3.

[0031] The working principle of this embodiment is as follows: During use, the support rod 200 is fixed on the seat. Under normal circumstances, the locking block 4 is in the connecting groove 23 and cooperates with the locking groove 31. The connecting groove 23 and the unlocking groove 51 are misaligned (not aligned). At this time, the locking block 4 cannot move into the unlocking groove 51. Under the cooperation of the locking block 4 and the locking groove 31, the connecting block 3 is restricted from rotating around the first axis relative to the base 1 and the mounting seat 2. Therefore, the armrest 100 cannot be rotated for adjustment, that is, the armrest 100 is locked in the rotation direction. When rotation adjustment is required, the button block 6 is pressed, so that the unlocking block 5 moves longitudinally in the sliding groove 22 until the position of the unlocking groove 51 is aligned with the position of the connecting groove 23. Then, the base 1 is rotated, and the mounting seat 2 will rotate around the first axis relative to the connecting block 3. At this time, the lock is engaged. The locking block 4 will gradually disengage from the locking groove 31 and gradually embed into the unlocking groove 51 (in this embodiment, the locking block 4 is cylindrical and the locking groove 31 is arc-shaped to facilitate the disengagement of the locking block 4). That is, the locking block 4 and the locking groove 31 no longer maintain a fit, and the base 1 can rotate freely. That is, the armrest 100 is in the unlocked state in the rotation direction, so that the position of the armrest 100 can be adjusted by rotation. After the adjustment is completed, the position of the other locking groove 31 corresponds to the position of the connecting groove 23. Then, the button block 6 and the unlocking block 5 are reset. During this process, the locking block 4 will gradually disengage from the unlocking groove 51 until it returns to the position that fits with the locking groove 31, so that the armrest 100 returns to the locked state in the rotation direction, preventing the armrest 100 from rotating accidentally. This utility model is easy to operate and has a stable structure.

[0032] For example, the mounting groove 21 is provided with positioning grooves 211 evenly distributed around the first axis on the side away from the connecting groove 23. The arc between two adjacent positioning grooves 211 is consistent with the arc between two adjacent locking grooves 31. The connecting block 3 is provided with an elastic member 8 on the side away from the locking groove 31. The elastic member 8 cooperates with one of the positioning grooves 211. When the base 1 and the mounting seat 2 rotate relative to the connecting block 3, the locking member will gradually disengage from the positioning groove 211 until the position of the locking member corresponds to the position of the other positioning groove 211. At this time, the position of the connecting groove 23 will correspond to the position of the locking groove 31. That is, the positioning of the handrail 100 during rotation adjustment is facilitated by the cooperation of the locking member and the positioning groove 211.

[0033] For example, the connecting block 3 has a connecting groove 32 arranged laterally on the side away from the locking groove 31. The elastic member 8 includes a positioning block 81 and a positioning spring 82. The positioning block 81 is slidably connected to the connecting groove 32. The positioning block 81 extends out of the connecting groove 32 and cooperates with one of the positioning grooves 211. The positioning spring 82 is arranged laterally and is located between the positioning block 81 and the side wall of the mounting groove 21. When the mounting base 2 rotates relative to the connecting block 3, the positioning block 81 gradually disengages from the positioning groove 211 and gradually moves towards the connecting groove 32. At this time, the positioning spring 82 is compressed to generate elastic force. When the position of the positioning block 81 corresponds to the position of the other positioning groove 211, the positioning block 81 is embedded in the positioning groove 211 under the action of the elastic force. In this example, the positioning groove 211 is arc-shaped to facilitate the disengagement of the positioning block 81.

[0034] For example, the base 1 is provided with an adjustment groove 11 arranged in a horizontal direction, the mounting seat 2 is slidably engaged with the adjustment groove 11, the bottom of the adjustment groove 11 is provided with a through groove 12 arranged in a horizontal direction, the connecting column 7 passes through the through groove 12 and the bottom of the mounting seat 2 and is fixedly connected to the connecting block 3. Since the support column is fixedly connected to the connecting block 3 through the connecting column 7, and the mounting seat 2 is slidably connected to the adjustment seat, the base 1 can move horizontally relative to the mounting seat 2 and the support column, that is, the horizontal adjustment of the handrail 100 is realized.

[0035] For example, a connecting frame 9 capable of moving longitudinally is installed on the base 1. The connecting frame 9 includes a vertical plate 91 and a horizontal plate 92 fixedly connected. The vertical plate 91 is located on the side of the adjustment groove 11 near the button block 6 and is connected to the button block 6. The bottom of the side of the horizontal plate 92 near the unlocking block 5 is provided with a guide strip 921 arranged in a horizontal direction. The top of the unlocking block 5 is provided with a guide groove 52 that slides with the guide strip 921. That is, the button block 6 is connected to the unlocking block 5 through the connecting frame 9. Driving the button block 6 to move longitudinally can drive the connecting frame 9 and the unlocking block 5 to move longitudinally together. In this embodiment, the side of the adjustment groove 11 near the button block 6 is provided with a slot arranged in a horizontal direction. The unlocking block 5 is provided with a connecting part extending out of the slot. The guide groove 52 is located on the top of the connecting part so that the guide strip 921 can be connected to the guide groove 52.

[0036] For example, a reset spring 93 is provided between the vertical plate 91 and the side wall of the adjustment groove 11 to facilitate the reset of the button block 6 and the unlocking block 5.

[0037] For example, the adjustment groove 11 is provided with a plurality of locking teeth 53 grooves 111 arranged laterally on the side near the button block 6. The side of the unlocking block 5 is provided with locking teeth 53 that cooperate with the locking teeth 53 grooves 111. Under normal circumstances, the locking teeth 53 cooperate with the locking teeth 53 grooves 111 to restrict the base 1 from moving laterally relative to the mounting base 2, that is, to restrict the armrest 100 from adjusting laterally. Therefore, the armrest 100 is in a locked state in the lateral direction. When lateral adjustment is required, the button block 6 is pressed to move the unlocking block 5 away from the button block 6 until the locking teeth 53 disengage from the locking teeth 53 grooves 111. Then the armrest 100 can be adjusted laterally, that is, the armrest 100 is in an unlocked state in the lateral direction. Generally, at this time, the unlocking block 5 moves to the position corresponding to the unlocking groove 51 and the connecting groove 23, that is, the armrest 100 can be rotated and adjusted, so that the rotation adjustment restriction and lateral adjustment restriction of the armrest 100 can be released with one key.

[0038] For example, guide slopes 511 are provided on both sides of the unlocking groove 51. The guide slopes 511 gradually approach the unlocking groove 51 in the direction away from the mounting groove 21, that is, the width of the unlocking groove 51 gradually narrows in the direction away from the mounting groove 21. The setting of the guide slopes 511 helps the unlocking block 5 to move away from the unlocking groove 51.

[0039] For example, the bottom of the mounting groove 21 is provided with a connecting hole 212, the axis of the connecting hole 212 is the first axis, the bottom of the connecting block 3 is provided with a connecting boss 33 that is rotatably connected to the connecting hole 212, so that the connecting block 3 can be rotatably disposed in the mounting groove 21 around the first axis, and the connecting post 7 passes through the bottom of the base 1 and is fixedly connected to the connecting boss 33, such as by bolts, to achieve the fixed connection between the connecting post 7 and the connecting block 3.

[0040] In another embodiment of this utility model, such as Figures 10-12 As shown, the upper cover of the adjustment groove 11 is provided with a locking cover 112, and the top of the locking cover 112 is provided with a receiving groove 113. The receiving groove 113 is provided with a plurality of locking teeth 53 grooves 111 arranged laterally on the side near the button block 6. The top of the unlocking block 5 is provided with a locking boss 54 extending into the receiving groove 113. The locking boss 54 can move laterally within a clearance. The locking boss 54 is provided with locking teeth 53 that cooperate with the locking teeth 53 grooves 111, which can also realize the locking and unlocking of the armrest 100 in the horizontal direction. In this embodiment, the bottom surface of the horizontal plate 92 is higher than the top surface of the side wall of the adjustment groove 11 near the button block 6. The side of the horizontal plate 92 near the adjustment groove 11 extends into the upper part of the adjustment groove 11 so that the guide strip 921 cooperates with the guide groove 52.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A seat armrest with a locking mechanism, characterized in that: The device includes an armrest and a support rod. The armrest includes a base and a panel covering the base. The base has a mounting seat, and the top of the mounting seat has a mounting groove and a sliding groove. The mounting groove is located on one side of the sliding groove. A connecting groove is provided between the mounting groove and the sliding groove, respectively communicating with the mounting groove and the sliding groove. A connecting block that rotates around a first axis is rotatably connected in the mounting groove. The side of the connecting block near the connecting groove has multiple locking grooves evenly distributed around the first axis. A locking block is matched in the connecting groove and extends out of the connecting groove to cooperate with one of the locking grooves. An unlocking block that can slide longitudinally is provided in the sliding groove. The side of the unlocking block near the mounting groove has an unlocking groove. When the position of the unlocking groove corresponds to the position of the locking groove, the locking block can disengage from the locking groove and embed into the unlocking groove. A button block that can move longitudinally is provided on one side of the base and is connected to the unlocking block. A connecting post is provided at the top of the support rod, and the connecting post passes through the bottom of the base and the bottom of the mounting seat and is fixedly connected to the connecting block.

2. The seat armrest with locking mechanism according to claim 1, characterized in that: The mounting groove has positioning grooves evenly distributed around the first axis on the side away from the connecting groove. The arc between two adjacent positioning grooves is consistent with the arc between two adjacent locking grooves. The connecting block has an elastic member on the side away from the locking groove, and the elastic member cooperates with one of the positioning grooves.

3. The seat armrest with locking mechanism according to claim 2, characterized in that: The connecting block has a connecting groove arranged laterally on the side away from the locking groove. The elastic member includes a positioning block and a positioning spring. The positioning block is slidably connected to the connecting groove. The positioning block extends out of the connecting groove and cooperates with one of the positioning grooves. The positioning spring is arranged laterally and is located between the positioning block and the side wall of the mounting groove.

4. The seat armrest with locking mechanism according to claim 1, characterized in that: The base is provided with an adjustment groove arranged in a horizontal direction. The mounting base is slidably engaged with the adjustment groove. The bottom of the adjustment groove is provided with a through groove arranged in a horizontal direction. The connecting post passes through the through groove and the bottom of the mounting base and is fixedly connected to the connecting block.

5. The seat armrest with locking mechanism according to claim 4, characterized in that: The base is equipped with a connecting frame that can move longitudinally. The connecting frame includes a vertical plate and a horizontal plate that are fixedly connected. The vertical plate is located on the side of the adjustment groove near the button block and is connected to the button block. The bottom of the horizontal plate near the unlocking block is provided with a guide strip that is arranged laterally. The top of the unlocking block is provided with a guide groove that slides with the guide strip.

6. The seat armrest with locking mechanism according to claim 5, characterized in that: A reset spring is provided between the vertical plate and the side wall of the adjustment groove.

7. The seat armrest with locking mechanism according to claim 5, characterized in that: The adjustment groove has multiple locking grooves arranged laterally on the side near the button block, and the unlocking block has locking teeth on the side that cooperate with the locking grooves.

8. The seat armrest with locking mechanism according to claim 5, characterized in that: The adjustment slot cover is provided with a locking cover, the top of the locking cover is provided with a receiving slot, the receiving slot is provided with a plurality of locking tooth slots arranged laterally on the side of the receiving slot near the button block, the top of the unlocking block is provided with a locking boss extending into the receiving slot, and the locking boss is provided with locking teeth that cooperate with the locking tooth slots.

9. The seat armrest with locking mechanism according to claim 1, characterized in that: The unlocking groove has guide slopes on both sides of its longitudinal direction, and the guide slopes gradually approach the unlocking groove in a direction away from the mounting groove.

10. The seat armrest with locking mechanism according to claim 1, characterized in that: The mounting base has a connecting hole at its bottom, the axis of which is the first axis. The bottom of the connecting block has a connecting boss that is rotatably connected to the connecting hole. The connecting post passes through the bottom of the base and is fixedly connected to the connecting boss.

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