Telescopic protection structure of a telescopic arm of a seat

Abstract

The utility model belongs to office furniture, and discloses a telescopic protection structure of a telescopic arm of a chair, including a first arm and a second arm that are telescopically matched, the first arm is connected to a back support, the second arm is connected to a backrest, a first elastic member is arranged on one of the first arm and the second arm, and an extension reminder part and a shortening buffer part are arranged on the other; when the first arm and the second arm are extended to an extreme state, the first elastic member and the extension reminder part are blocked; when the first arm and the second arm are shortened to an extreme state, the first elastic member and the shortening buffer part are blocked. The utility model is provided with structures such as a first elastic member, an extension reminder part, and a shortening buffer part. When the telescopic arm is extended to the maximum, the damping feeling brought by the contact between the first elastic member and the extension reminder part is used to remind the user. When the telescopic arm is retracted to the shortest, the damping brought by the contact between the first elastic member and the shortening buffer part is used to provide a buffer to the customer, thereby preventing the customer from being injured.

Description

Technical Field

[0001] The utility model relates to the field of office furniture, in particular to a telescopic protection structure of a telescopic arm of a chair. Background Art

[0002] At present, the backrests of some seats are installed on the back brackets through support arms. The applicant thought of designing the support arms into a telescopic structure to expand the range of movement of the backrest and make it more comfortable for users to use. The problem is that the existing cantilever structure lacks reminders and buffers when it is extended to the extreme position, which affects the user experience. Utility Model Content

[0003] The utility model aims to provide a telescopic protection structure of a telescopic arm of a seat to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A telescopic protection structure for a telescopic arm of a chair, comprising a first arm and a second arm that are telescopically matched, wherein the first arm is connected to a back support, and the second arm is connected to a backrest, a first elastic member is arranged on one of the first arm and the second arm, and an extension reminder portion and a shortening buffer portion are arranged on the other arm;

[0006] When the first arm and the second arm are extended to the limit state, the first elastic member is in contact with the extension reminding portion;

[0007] When the first arm and the second arm are shortened to a limit state, the first elastic member is in contact with the shortening buffer portion.

[0008] Furthermore, the first arm is a sleeve structure, and the second arm is an insert block structure that is slidably plugged with the first arm.

[0009] Furthermore, a first elastic member is arranged on the first arm, and an extension reminding portion and a shortening buffer portion are arranged on the second arm.

[0010] Furthermore, the first elastic member is a torsion spring, and two ends of the first elastic member are respectively used to abut against the extension reminding portion and the shortening buffer portion.

[0011] Furthermore, it also includes a telescopic locking mechanism, which is used to lock the telescopic state of the first arm and the second arm.

[0012] Furthermore, the telescopic locking mechanism is a linear sliding module, which includes a locking bar, a slide groove and a sliding module. The locking bar and the slide groove are arranged in parallel on one of the first arm and the second arm, and the sliding module is slidably arranged on the other of the first arm and the second arm along the length direction of the locking bar and the slide groove. The sliding module includes a mounting member and a locking tongue and a second elastic member arranged on the mounting member. The locking tongue is movably connected to the mounting member and is used to lock and cooperate with the locking bar. The second elastic member presses the locking tongue toward the locking bar, and the slide groove is used to guide the movement of the locking tongue so that the locking tongue is unlocked from the locking bar when the sliding module reaches the sliding limit state.

[0013] Furthermore, the first elastic member is arranged on the sliding module.

[0014] Furthermore, the linear sliding module also includes a linear bracket, the locking strip and the slide groove are arranged on the linear bracket, and the extension reminder part is a stopper arranged on the linear bracket.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a first elastic member, an extension reminder portion, a shortening buffer portion and other structures; when the telescopic arm is extended to the maximum, the user is reminded by the damping feeling brought about by the contact between the first elastic member and the extension reminder portion; when the telescopic arm is retracted to the shortest, the damping brought about by the contact between the first elastic member and the shortening buffer portion provides a buffer for the customer, thereby avoiding injury or discomfort to the customer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the exploded structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0019] Figure 4 This is one of the schematic diagrams of the telescopic locking mechanism structure in the utility model.

[0020] Figure 5 This is the second schematic diagram of the telescopic locking mechanism structure in the utility model.

[0021] Figure 6 This is a schematic diagram of the sliding module structure in the utility model.

[0022] Figure 7 It is a schematic diagram of the lock tongue structure in the utility model.

[0023] Figure 8 This is a schematic diagram of the utility model in use state. DETAILED DESCRIPTION

[0024] 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 in 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.

[0025] See also Figure 1-Figure 8 A telescopic protective structure for a telescopic arm of a chair comprises a first arm 605 and a second arm 606 that are telescopically matched, wherein the first arm 605 is connected to a back support 1, and the second arm 606 is connected to a backrest, a first elastic member 607 is arranged on the second arm 606, and an extension reminder portion 5050 and a shortening buffer portion 6050 are arranged front and rear on the first arm 605. When the first arm 605 and the second arm 606 are extended to an extreme state, the first elastic member 607 is blocked with the extension reminder portion 5050. When the first arm 605 and the second arm 606 are shortened to an extreme state, the first elastic member 607 is blocked with the shortening buffer portion 6050.

[0026] In another embodiment of the present invention, a first elastic member 607 is disposed on the first arm 605 , and an extension reminding portion 5050 and a shortening buffer portion 6050 are disposed on the second arm 606 .

[0027] Continue reading Figure 1-Figure 3 In one embodiment of the present invention, the first arm 605 is a sleeve structure, and the second arm 606 is an insert structure that is slidably plugged with the first arm 605 .

[0028] In another embodiment of the present invention, the second arm 606 is a sleeve structure, and the first arm 605 is an insert block structure that is slidably plugged with the first arm 605 .

[0029] Continue reading Figure 2-Figure 7 In one embodiment of the utility model, the utility model further includes a telescopic locking mechanism, which is used to lock the telescopic state of the first arm 605 and the second arm 606. The telescopic locking mechanism is a linear sliding module, which includes a locking bar 500, a slide groove 501 and a sliding module. The locking bar 500 and the slide groove 501 are arranged in parallel. The sliding module is arranged on the second arm 606, and can slide along the length direction of the locking bar 500 and the slide groove 501 as the second arm 606 is extended and retracted. It includes a mounting member 502 and a locking tongue 503 and a second elastic member 504 arranged on the mounting member 502. The locking tongue 503 is movably connected to the mounting member 502, and is used to lock and cooperate with the locking bar 500. The second elastic member 504 presses the locking tongue 503 toward the locking bar 500. The slide groove 501 is used to guide the movement of the locking tongue 503, so that the locking tongue 503 is unlocked from the locking bar 500 when the sliding module reaches the sliding limit state.

[0030] Continue reading Figure 4-Figure 7 In one embodiment of the present invention, the locking bar 500 is a ratchet bar structure, and the locking tongue 503 has a ratchet portion 5030 for engaging with the locking bar 500. The ratchet is an oblique tooth, and when the ratchet bar structure engages with the ratchet portion 5030, the ratchet structure enables the sliding module to move toward the inclined side of the ratchet, but not to move toward the other side.

[0031] Continue reading Figure 4-Figure 6 In one embodiment of the present utility model, the lock tongue 503 has a lock tongue shaft 5034 , and the lock tongue shaft 5034 is rotatably connected to the circular hole on the mounting member 502 .

[0032] Continue reading Figure 4-Figure 6 In one embodiment of the utility model, the mounting member 502 is a shell structure, the lock tongue 503 and the second elastic member 504 are both arranged inside the mounting member 502, the second elastic member 504 is preferably a torsion spring, and the mounting member 502 has a cylinder for mounting the second elastic member 504, one end of the second elastic member 504 is connected to the lock tongue 503 for squeezing the lock tongue 503.

[0033] Continue reading Figure 6-Figure 7 In one embodiment of the utility model, the lock tongue 503 has a locking groove 5031 and an unlocking groove 5032, and the locking groove 5031 and the unlocking groove 5032 are arranged adjacent to each other with a raised triangular slope therebetween. The locking groove 5031 is further away from the ratchet portion 5030 than the unlocking groove 5032.

[0034] When one end of the second elastic member 504 is matched with the locking groove 5031, since the locking groove 5031 is far away from the ratchet portion 5030, the second elastic member 504 can squeeze the lock tongue 503 toward the locking strip 500 for a greater distance, so that the lock tongue 503 is locked and matched with the locking strip 500. When one end of the second elastic member 504 is matched with the unlocking groove 5032, since the unlocking groove 5032 is closer to the ratchet portion 5030, the distance that the second elastic member 504 squeezes the lock tongue 503 toward the locking strip 500 is relatively short, and the lock tongue 503 will not be locked with the locking strip 500, that is, the second elastic member 504 puts the lock tongue 503 in an unlocked state. The function of the slide groove 501 is to guide the lock tongue 503 to switch between the state in which the locking groove 5031 cooperates with the second elastic member 504 and the state in which the unlocking groove 5032 cooperates with the second elastic member 504, that is, to enable one end of the second elastic member 504 to break through the triangular slope from the locking groove 5031 and enter the unlocking groove 5032, and to enable the second elastic member 504 to break through the triangular slope from the unlocking groove 5032 and enter the locking groove 5031.

[0035] Continue reading Figure 4 and Figure 6In one embodiment of the utility model, a lock tongue 503 has a lock tongue unlocking portion 5033, and the lock tongue unlocking portion 5033 is a convex column structure. The slide groove 501 is an annular structure, and a trapezoidal groove body is formed inside. The inclined surfaces on both sides of the trapezoidal groove body are guide surfaces 5010, and the guide surfaces 5010 are used to cooperate with the lock tongue unlocking portion 5033. When the lock tongue unlocking portion 5033 moves along the guide surfaces 5010, the guide surfaces 5010 guide the lock tongue unlocking portion 5033 to move in a direction away from the locking strip 500, thereby driving the lock tongue 503 to unlock the locking strip 500.

[0036] Continue reading Figure 4 and Figure 6 In one embodiment of the present invention, a limiting groove 5020 is provided on the mounting member 502 , and the limiting groove 5020 is slidably matched with the locking tongue unlocking portion 5033 .

[0037] Continue reading Figure 4 and Figure 5 In one embodiment of the utility model, the telescopic locking mechanism also includes a linear bracket 505, the locking strip 500 and the slide groove 501 are arranged on the linear bracket 505, and the extension reminder portion 5050 is a block arranged on the linear bracket 505.

[0038] Continue reading Figure 3 In one embodiment of the present invention, the extension reminder portion 5050 is the bottom wall of the inner cavity of the first arm 605 .

[0039] Continue reading Figure 2 and Figure 4 In one embodiment of the present invention, the first elastic member 607 is a torsion spring, one end of which faces forward and the other end faces backward, and the two ends are respectively used to block the extension reminder part 5050 and the shortening buffer part 6050. A mounting column is arranged outside the mounting member 502 of the sliding module, and the first elastic member 607 is sleeved on the mounting column.

[0040] Introduce the use of the utility model:

[0041] When the telescopic locking mechanism is in the unlocked state, the telescopic arm can be extended forward and backward, and the sliding module will move with the second arm 606. When the telescopic locking mechanism is in the locked state, the second arm 606 can only move in the inclined direction of the ratchet teeth of the locking strip 500, that is, in the direction of extension of the second arm 606, and cannot move in the opposite direction.

[0042] Under normal circumstances, the ratchet portion 5030 of the lock tongue 503 is engaged with the locking strip 500, and the telescopic locking mechanism is in a locked state. The second elastic member 504 cooperates with the locking groove 5031. Due to the characteristics of the ratchet, the sliding module can slide in the inclined direction of the ratchet of the locking strip 500, that is, in the direction of extending the second arm 606. When stopping, the second elastic member 504 will cause the ratchet portion 5030 to engage with the locking strip 500 again. When the second arm 606 is stretched to the maximum, the first elastic member 607 will first hit the extension reminder portion 5050. The damping feeling generated at this time will remind the user that the telescopic arm has been extended to the maximum. The compression of the first elastic member 607 has a process. At the beginning, the telescopic locking mechanism is still in an unlocked state. Then, as the first elastic member 607 is further compressed and the second arm 606 is further extended, the sliding module will slide to the extreme position, and the lock tongue unlocking portion 5033 will encounter The upper guide surface 5010, under the guidance of the guide surface 5010, the lock tongue unlocking portion 5033 and the lock tongue 503 rotate as a whole in the direction away from the locking strip 500, and as the lock tongue 503 rotates, the second elastic member 504 breaks through the triangular slope and enters the unlocking groove 5032, thereby completing the unlocking and maintaining the lock tongue 504 in the unlocked state. At this time, the second arm 606 can be slid in the opposite direction to any position, and the lock tongue unlocking portion 5033 of the lock tongue 503 drives the lock tongue 503 to rotate in the opposite direction under the guidance of the guide surface 5010, so that the second elastic member 504 returns from the state of matching with the unlocking groove 5032 to the state of matching with the locking groove 5031. After the second arm 606 stops sliding, under the action of the second elastic member 504, the telescopic locking mechanism is locked again. When the second arm 606 retracts to the shortest, the first elastic member 607 hits the shortening buffer portion 6050 to provide a buffer for the user.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic protection structure for a seat telescopic arm, characterized in that: It comprises a first arm (605) and a second arm (606) that are telescopically matched, the first arm (605) being connected to a back support (1), the second arm (606) being connected to a backrest, a first elastic member (607) being provided on one of the first arm (605) and the second arm (606), and an extension reminder portion (5050) and a shortening buffer portion (6050) being provided on the other; When the first arm (605) and the second arm (606) are extended to an extreme state, the first elastic member (607) is in contact with the extension reminder portion (5050); When the first arm (605) and the second arm (606) are shortened to an extreme state, the first elastic member (607) is in contact with the shortening buffer portion (6050).

2. A telescopic protection structure for a telescopic arm of a seat according to claim 1, characterized in that: The first arm (605) is a sleeve structure, and the second arm (606) is an insert block structure that is slidably plugged into the first arm (605).

3. A telescopic protection structure for a telescopic seat arm according to claim 1, characterized in that: A first elastic member (607) is provided on the first arm (605), and an extension reminder portion (5050) and a shortening buffer portion (6050) are provided on the second arm (606).

4. A telescopic protection structure for a telescopic seat arm according to claim 1, characterized in that: The first elastic member (607) is a torsion spring, and its two ends are respectively used to engage with the extension reminder portion (5050) and the shortening buffer portion (6050).

5. The telescopic protection structure of a telescopic arm of a seat according to claim 1, characterized in that: It also includes a telescopic locking mechanism, which is used to lock the telescopic state of the first arm (605) and the second arm (606).

6. A telescopic protection structure for a telescopic arm of a seat according to claim 5, characterized in that: The telescopic locking mechanism is a linear sliding module, which includes a locking bar (500), a slide groove (501) and a sliding module. The locking bar (500) and the slide groove (501) are arranged in parallel on one of the first arm (605) and the second arm (606). The sliding module is slidably arranged on the other of the first arm (605) and the second arm (606) along the length direction of the locking bar (500) and the slide groove (501). The sliding module includes a mounting member (502) and a device A locking tongue (503) and a second elastic member (504) are disposed on a mounting member (502); the locking tongue (503) is movably connected to the mounting member (502) and is used to lock with a locking strip (500); the second elastic member (504) presses the locking tongue (503) toward the locking strip (500); and the sliding groove (501) is used to guide the locking tongue (503) to move so that the locking tongue (503) is unlocked from the locking strip (500) when the sliding module reaches a sliding limit state.

7. A telescopic protection structure for a telescopic arm of a seat according to claim 6, characterized in that: The first elastic member (607) is arranged on the sliding module.

8. The telescopic protection structure of a telescopic arm of a seat according to claim 6, characterized in that: The linear sliding module also includes a linear bracket (505), the locking strip (500) and the slide groove (501) are arranged on the linear bracket (505), and the extension reminder portion (5050) is a stopper arranged on the linear bracket (505).

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