Back-chasing locking structure

Abstract

The utility model relates to the field of chairs, and particularly discloses a back-chasing locking structure which comprises a rod piece used for being connected with a backrest. The sleeve piece is provided with a groove allowing the rod piece to be inserted therein, and is connected with a lifting rod of a seat during installation; the locking piece is mounted on the sleeve piece; the lock groove is used for inserting or separating the lock piece; the locking piece comprises a guide piece which is fixed on the sleeve piece and is provided with a guide part, and the guide part synchronously extends along the circumference and the axial direction of the guide piece; the rotating part is provided with a transmission part matched with the guide part, and when the rotating part rotates circumferentially relative to the guide part, the rotating part moves in the axial direction of the guide part under the action of the guide part and the transmission part; the inserting piece is provided with an inserting block which moves in the axial direction of the guiding piece to be inserted into the locking groove, and the inserting piece is in transmission fit with the transmission piece and can only move in the axial direction of the guiding piece. The back-chasing device has the effect of quickly realizing back-chasing adjustment.

Description

Technical Field

[0001] This application relates to the field of chairs, and in particular to a backrest locking structure. Background Technology

[0002] Currently, to make children's chairs more comfortable, a backrest structure is usually installed on them.

[0003] Existing backrest-following structures, such as the Chinese patent with publication number CN220832486U in related technologies, mainly use the method of pressing down the seat plate to drive the backrest to follow the backrest. This method has a specific backrest-following stroke and cannot well adapt to everyone's situation. Utility Model Content

[0004] To address the issue of adjusting the position of the pursuer, this application provides a pursuer locking structure.

[0005] The back-locking structure provided in this application adopts the following technical solution:

[0006] A back-locking structure, characterized in that:

[0007] Includes rods for connecting the backrest;

[0008] A sleeve with a groove for inserting a rod, which is connected to the seat's lifting rod during installation;

[0009] Locking element, installed on sleeve component;

[0010] Lock groove, used for inserting or disengaging lock components;

[0011] The locking element includes:

[0012] A guide member is fixed on a sleeve and has a guide portion, which extends synchronously along the circumference and axial direction of the guide member;

[0013] The rotating component has a transmission part that cooperates with the guide part. When the rotating component rotates circumferentially relative to the guide part, it moves axially along the guide part under the action of the guide part and the transmission part.

[0014] An insert has an insert block that moves axially along the guide and is inserted into a locking groove. The insert and the transmission component are in a transmission engagement and can only move axially along the guide.

[0015] Optionally, the guide includes a fixing part with a through hole at the center. The guide is located on the fixing part. The rotating part includes a handle and a transmission column that rotates synchronously with the handle and is inserted into the through hole. The insertion part is connected to the transmission column.

[0016] Optionally, the handle portion has a linkage groove, and one end of the transmission column is matched with the linkage groove. When the transmission column is inserted into the linkage groove, the handle portion can synchronously drive the transmission column to rotate.

[0017] Optionally, the drive column and the handle are connected by bolts.

[0018] Optionally, a barrier is provided on the outside of the fixing part, and the barrier is provided at an interval from the fixing part.

[0019] Optionally, two insertion blocks are symmetrically arranged.

[0020] Optionally, the handle portion includes an end cap and an actuating portion integrally formed on the end cap and extending radially along the end cap.

[0021] Optionally, a receiving groove is formed on the outside of the handle portion, and a shielding plate is provided in the receiving groove to shield the bolt.

[0022] In summary, this application achieves rapid locking and adjustment of the backrest structure by rotating the handle. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0024] Figure 2 This is a partial structural diagram of the sleeve and locking components according to an embodiment of this application;

[0025] Figure 3 This is a diagram showing the fit between the transmission column and the insert in an embodiment of this application;

[0026] Figure 4 This is a structural diagram of the handle and transmission parts in an embodiment of this application;

[0027] Figure 5 This is a top view of an embodiment of this application;

[0028] Figure 6 It is along Figure 1 Schematic diagram of the cross-sectional structure along line AA in the middle.

[0029] Reference numerals: 1. Rod; 11. Locking groove; 2. Sleeve; 3. Lock; 4. Guide; 41. Guide part; 411. Guide wall; 42. Fixing part; 43. Through hole; 44. Enclosing part; 5. Rotating part; 51. Transmission part; 52. Handle part; 521. Linkage groove; 522. End cap; 523. Actuating part; 53. Transmission column; 54. Bolt; 6. Insert; 61. Insertion block; 62. Connecting part; 7. Cover plate. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6This application will be described in further detail.

[0031] This application discloses a back-locking structure. (Refer to...) Figure 1 The backrest locking structure includes a rod 1, a sleeve 2, and a lock 3. The rod 1 connects to the backrest. The sleeve 2 has a groove for the rod 1 to insert into and connects to the seat's lifting rod during installation. Multiple locking slots 11 are provided on the rod 1 along its length. The lock 3 is mounted on the sleeve 2 to lock the relative positions of the rod 1 and the sleeve 2. In use, the backrest locking structure is essentially horizontal.

[0032] The locking component 3 includes a guide component 4, a rotating component 5, and an insert component 6. The guide component 4 is fixed to the sleeve component 2 and has a guide portion 41, which extends synchronously along the circumference and axial direction of the guide component 4. The rotating component 5 has a transmission portion 51 that cooperates with the guide portion 41. When the rotating component 5 rotates relative to the circumference of the guide component 4, it moves simultaneously along the axial direction of the guide component 4 under the action of the guide portion 41 and the transmission portion 51. The insert component 6 has an insertion block 61 that moves along the axial direction of the guide component 4 and is inserted into the locking groove 11. The insert component 6 is in a transmission engagement with the transmission component and can only move along the axial direction of the guide component 4.

[0033] Specifically, the guide member 4 includes a fixing part 42, with a through hole 43 at its center, and a guide part 41 located on the fixing part 42. The fixing part 42 is generally cylindrical, and the guide part 41 is specifically a guide groove formed in the fixing part 42, with a spirally rising guide wall 411 at the bottom of the guide groove. A retaining part 44 is provided on the outside of the fixing part 42, and the retaining part 44 is spaced apart from the fixing part 42.

[0034] The rotating component 5 includes a handle portion 52 and a transmission column 53 that rotates synchronously with the handle portion 52 and is inserted into a through hole 43. The insertion component 6 is connected to the transmission column 53. The handle portion 52 has a linkage groove 521, which is a non-circular groove. One end of the transmission column 53 mates with the linkage groove 521. When the transmission column 53 is inserted into the linkage groove 521, the handle portion 52 can synchronously drive the transmission column 53 to rotate. To prevent the transmission column 53 from disengaging from the linkage groove 521, a threaded hole is provided at the end of the transmission column 53, and an insertion hole is provided on the handle portion 52. A bolt 54 passes through the insertion hole and is threadedly connected to the threaded hole. The transmission column 53 and the handle portion 52 are connected by bolts 54, thereby enabling the handle portion 52 to stably drive the transmission column 53 to rotate. The handle portion 52 includes an end cap 522 and a lever portion 523 integrally formed on the end cap 522 and extending radially along the end cap 522. The transmission part 51 is fixed on the end cover 522 and two are provided corresponding to the guide groove. Specifically, the transmission part 51 is a transmission bar that extends axially along the end cover 522 and the end of the transmission bar is arc-shaped.

[0035] A receiving groove is formed on the outside of the handle portion 52 (end cap 522), and a shielding plate 7 is disposed in the receiving groove to shield the bolt 54. The shape of the receiving groove matches the shape of the shielding plate 7 to ensure that the shielding plate 7 can be stably positioned in the receiving groove and prevent it from shifting during use. In addition, the shielding plate 7 is made of a material with a certain degree of elasticity and toughness (plastic sheet) so that it can deform to a certain extent when subjected to external force, thereby better shielding and protecting the bolt 54 from interference and damage from external factors.

[0036] The insert 6 includes a connecting part 62 and an insert block 61 fixed on the connecting part 62. Two insert blocks 61 are symmetrically arranged to ensure greater stability when inserted into the locking groove 11. The connecting part 62 is a short cylindrical structure with two flat ends on the insert blocks 61 and a partially flat surface at the through hole 43. The flat surface inside the through hole 43 contacts the flat surface on the insert block 61, allowing the connecting part 62 to move only axially along the through hole 43. The connecting part 62 is magnetically connected, rotatably connected, or abuts against the transmission column 53. When rotatably connected, one end of the transmission column 53 extends into the connecting part 62 and forms an end (e.g., ...). Figure 6 (As shown), the connection part 62 and the transmission column 53 are separated by the end caps. When a magnetic connection is used, the connection part 62 and the transmission column 53 only need to be magnetically attracted; for example, the transmission column 53 is made of iron, and the connection part 62 is made of magnetic material. When an abutment method is used, a spring also needs to be installed. One end of the spring is connected to the connection part 62, and the other end is connected to the fixing part 42 (by gluing or welding). The spring is a tension spring. When the insertion block 61 is not inserted into the locking groove 11, the spring is in its natural state; when it is inserted into the locking groove 11, the spring is stretched.

[0037] The implementation principle of the back-locking structure in this application embodiment is as follows: by rotating the actuating part 523, the end cover 522 is driven to move along the guide groove. Since the arc-shaped part of the guide bar abuts against the guide wall 411, the end cover 522 moves axially during the rotation, which in turn drives the transmission column 53 to move axially, and finally drives the insertion block 61 of the insertion member 6 to move axially to disengage from or insert into the locking groove 11.

[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A backrest locking structure, characterized in that: a rod is used to connect a backrest; a sleeve is provided with a groove for the rod to be inserted into, and is connected with a lifting rod of a seat when installed; a lock is installed on the sleeve; a lock groove is used for the lock to be inserted into or separated from; the lock comprises: a guide fixed on the sleeve and provided with a guide portion extending along the circumference and the axial direction of the guide; a rotating member provided with a transmission portion matched with the guide portion, and moving along the axial direction of the guide when the rotating member rotates along the circumference of the guide under the action of the guide portion and the transmission portion; and an insertion member provided with an insertion block moving along the axial direction of the guide to be inserted into the lock groove, and being able to move along the axial direction of the guide only under the transmission cooperation with the transmission member. The guide comprises a fixed portion provided with a through hole in the center, and the guide portion is located on the fixed portion; the rotating member comprises a handle portion and a transmission column inserted into the through hole and synchronously rotating with the handle portion; and the insertion member is connected with the transmission column. The handle portion is provided with a linkage groove, and one end of the transmission column is matched with the linkage groove, so that the handle portion can synchronously drive the transmission column to rotate when the transmission column is inserted into the linkage groove. The transmission column and the handle portion are connected through a bolt. The fixed portion is provided with a surrounding portion at the outside, and the surrounding portion is arranged at intervals with the fixed portion. The insertion block is symmetrically arranged in two. The handle portion comprises an end cover and a push portion integrally formed on the end cover and extending along the radial direction of the end cover. The handle portion is formed with a containing groove at the outside, and the containing groove is provided with a shielding sheet, and the shielding sheet shields the bolt. ​ 2. The back-up locking structure according to claim 1, wherein: ​ 3. The backstop structure according to claim 2, wherein: ​ 4. The back-up locking structure according to claim 3, wherein: ​ 5. The backstop structure of claim 2, wherein: ​ 6. The backstop structure of claim 1, wherein: ​ 7. The back-up locking structure according to claim 2, wherein: ​ 8. The backstop structure of claim 4, wherein: ​

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