Backrest device with locking structure

Abstract

The utility model relates to the technical field of backrest devices, and discloses a backrest device with a locking structure. The backrest device comprises a supporting plate, a backrest device plate, a connecting structure and a locking structure, the connecting structure is arranged on the backrest device plate, a positioning column is arranged at the connecting structure, a positioning groove is formed in the peripheral side of the positioning column, the positioning column penetrates through the supporting plate, and the locking structure is detachably connected to the positioning column; the locking structure comprises a fastener and a buckle, a containing groove is formed in the fastener from the bottom to the inside, an opening communicated with the containing groove is formed in one side of the fastener, the positioning column is slidably connected into the containing groove from the opening, the groove wall of the containing groove is clamped and limited in the positioning groove, and the buckle is rotationally connected to the fastener to close the opening. An existing locking structure is improved, the fasteners are additionally arranged to seal the opening of the locking structure, so that locking of the connecting structure and the locking structure is achieved in the horizontal direction and the vertical direction of the locking structure, the locking structure is prevented from being disengaged due to external force, and therefore the stability of connection between the backrest device plate and the chair back is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of backrest devices, and particularly relates to a backrest device with a locking structure. BACKGROUND

[0002] With the continuous development of technology, the demand for ergonomic backrest devices in the market is increasing. The existing backrest devices have broken through the traditional sponge or cloth type backrests in terms of material and function. Most of the existing backrest devices are made of hard plastic material, and the backrest part is directly installed on the support part, which can be adjusted up, down, left and right.

[0003] The backrest plate of the product is connected to the mounting hole on the support plate through the positioning column on the connecting piece. At this time, the connecting piece needs to be locked on the support plate. The existing product adopts the friction principle to design the locking accessory as a C-shaped structure and then clamps it into the groove provided on the positioning column. This scheme is affected by the external environment during use. For example, frequent activities of the user during use can cause the chair back to rub out the locking accessory. In addition, since the mounting hole of the locking accessory is open, it can also be knocked out by external impact. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the present application is to improve the existing locking structure, prevent the locking structure from being knocked out due to external force, and improve the stability of the connection between the backrest plate and the chair back.

[0005] In order to solve the above problems, the present application provides a backrest device with a locking structure, which comprises a support plate, a backrest plate, a connecting structure and a locking structure. The connecting structure is arranged on the backrest plate, and a positioning column is arranged on the connecting structure. A positioning groove is formed on the side of the positioning column. The positioning column penetrates the support plate, and the locking structure is detachably connected to the positioning column. The locking structure comprises a buckle and a clasp. The buckle is internally provided with a receiving groove from the bottom, and an opening is formed on one side of the buckle and communicates with the receiving groove. The positioning column is slidably connected to the receiving groove from the opening, and the groove wall of the receiving groove is connected to the positioning groove. The clasp is rotationally connected to the buckle to close the opening.

[0006] Preferably, the cross section of the buckle along the width direction is C-shaped.

[0007] Preferably, connecting holes are formed on both sides of the buckle, and a rotating shaft is arranged on the corresponding position of the clasp. The rotating shaft is rotationally connected to the connecting hole.

[0008] Preferably, limiting grooves are formed on both sides of the buckle, and limiting blocks are arranged on the corresponding positions of the clasp. When the clasp is rotated to the position of closing the opening, the limiting blocks are accommodated in the limiting grooves.

[0009] Preferably, the buckle is U-shaped.

[0010] Preferably, the support plate is provided with a plurality of mounting holes, and the positioning columns pass through the mounting holes.

[0011] Preferably, the mounting holes are symmetrically distributed on the left and right sides of the support plate, and the backrest device plate is provided with two pieces.

[0012] Preferably, the connecting structure further comprises a connecting piece and a positioning plate, the positioning columns and the connecting piece are respectively fixed on the two opposite sides of the positioning plate, and the connecting piece is arranged on the backrest device plate.

[0013] Preferably, the number of the positioning columns is a plurality, and the plurality of the positioning columns are arranged in a row.

[0014] Preferably, the number of the positioning columns is a plurality, and the plurality of the positioning columns are arranged in two parallel rows, the receiving grooves are provided with two, and the groove walls of the two receiving grooves are respectively connected to the positioning grooves on each row of the positioning columns.

[0015] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0016] The user can adjust the position of the backrest device plate according to personal use habits. When the backrest device plate is adjusted to a suitable position, the positioning column passes through the support plate. At this time, the buckle is rotated towards the direction away from the opening to open the opening of the buckle, and the buckle is connected to the end of the positioning column passing through the support plate from the opening, so that the groove wall of the receiving groove is connected to the positioning groove to prevent the buckle from being separated from the positioning column in the direction perpendicular to the support plate. Then, the buckle is rotated towards the direction close to the opening to close the opening, thereby locking the connecting structure and the locking structure. By improving the existing locking structure, the present application increases the opening of the locking structure closed by the buckle, so as to realize the locking of the connecting structure and the locking structure in the horizontal direction and the vertical direction of the locking structure, prevent the locking structure from being separated due to external force, and thereby improve the stability of the connection between the backrest device plate and the chair back. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0018] Figure 1 The assembly relationship of the backrest device in the embodiment of the present application is shown in the figure.

[0019] Figure 2 Figure 3 is an assembly relationship diagram of the connecting structure and the locking structure in an embodiment of the present application.

[0020] Figure 3 Figure 4 is a structure diagram of the locking structure in an embodiment of the present application.

[0021] Figure 4 Figure 5 is an assembly relationship diagram of the connecting structure and the locking structure in an embodiment of the present application.

[0022] Figure 5 Figure 6 is a cross-sectional view along the length direction of the connecting structure and the locking structure in a locked state in an embodiment of the present application.

[0023] Figure 6 Figure 7 is a cross-sectional view along the width direction of the connecting structure and the locking structure in a locked state in an embodiment of the present application.

[0024] Figure 7 Figure 8 is an assembly relationship diagram of the connecting structure and the locking structure in another embodiment of the present application.

[0025] Label explanation: 1, support plate; 11, mounting hole; 2, backrest device plate; 3, connecting structure; 31, positioning column; 311, positioning groove; 32, connecting piece; 33, positioning plate; 4, locking structure; 41, buckle; 411, accommodating groove; 412, opening; 413, connecting hole; 414, limiting groove; 42, buckle; 421, rotating shaft; 422, limiting block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] It should be understood that, when used in the specification and the appended claims, the terms “comprise” and “include” indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0028] It should also be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and the appended claims of the present application, unless otherwise clearly indicated by the context, the singular forms “a”, “an” and “the” are intended to include the plural forms.

[0029] It should also be further understood that the term "and / or" used in the specification and the appended claims, means any one or more of the associated listed items, as well as all possible combinations of the items, and includes these combinations.

[0030] Referring to Figures 1 to 7 The backrest device with the locking structure provided by the embodiment of the present application comprises a support plate 1, a backrest device plate 2, a connecting structure 3 and a locking structure 4. The connecting structure 3 is arranged on the backrest device plate 2, and a positioning column 31 is arranged on the connecting structure 3. The positioning column 31 is provided with a positioning groove 311 on the side thereof. The positioning column 31 penetrates through the support plate 1, and the locking structure 4 is detachably connected to the positioning column 31. The locking structure 4 comprises a fastener 41 and a buckle 42. The fastener 41 is internally provided with a receiving groove 411 from the bottom thereof. An opening 412 is arranged on one side of the fastener 41 and is in communication with the receiving groove 411. The positioning column 31 is slidably connected to the receiving groove 411 from the opening 412. The groove wall of the receiving groove 411 is clamped to the positioning groove 311. The buckle 42 is rotationally connected to the fastener 41 to close the opening 412.

[0031] Here, the user can adjust the position of the backrest device plate 2 according to the personal use habit. When the backrest device plate 2 is adjusted to the suitable position, the positioning column 31 penetrates through the support plate 1. At this time, the buckle 42 is first rotated towards the direction away from the opening 412 to open the opening 412 of the buckle 42. The fastener 41 is slidably connected to the one end of the positioning column 31 penetrating out of the support plate 1 from the opening 412. The groove wall of the receiving groove 411 is clamped to the positioning groove 311 to prevent the fastener 41 from being separated from the positioning column 31 in the direction perpendicular to the support plate 1. Subsequently, the buckle 42 is rotated towards the direction close to the opening 412 to close the opening 412, thereby locking the connecting structure 3 and the locking structure 4. The present application improves the existing locking structure 4. The opening 412 of the locking structure 4 is closed by the fastener 41 to realize the locking of the connecting structure 3 and the locking structure 4 in the horizontal direction and the vertical direction of the locking structure 4. The locking structure 4 is prevented from being separated due to the external force, thereby improving the stability of the connection between the backrest device plate 2 and the chair back.

[0032] Referring to Figures 2 to 6 In a specific embodiment, the cross section of the fastener 41 in the width direction is C-shaped. The middle part of the cross section is the receiving groove 411. When the positioning column 31 is limited in the receiving groove 411, the groove wall of the receiving groove 411 is clamped to the positioning groove 311 to prevent the fastener 41 from being separated from the positioning column 31 in the direction perpendicular to the support plate 1.

[0033] In a specific embodiment, the buckle 41 is provided with a connecting hole 413 on each side thereof, and the two connecting holes 413 are located correspondingly. The two connecting ends of the buckle 42 are provided with a rotating shaft 421 correspondingly, and the rotating shaft 421 is rotatably connected in the connecting hole 413, so as to realize the rotating connection between the buckle 42 and the buckle 41.

[0034] Further, the buckle 41 is provided with a limiting groove 414 on each side thereof, and the two limiting grooves 414 are located correspondingly. The two connecting ends of the buckle 42 are provided with a limiting block 422 correspondingly. When the buckle 42 is rotated to the position of closing the opening 412, the limiting block 422 is accommodated in the limiting groove 414, so as to prevent the buckle 42 from being rotated to open the opening 412 in the use process of the backrest device, and causing the buckle 41 to be loosened from the positioning column 31.

[0035] In the embodiment, the buckle 41 is a cuboid, and thus the buckle 42 is a U-shaped structure matched with the opening 412 of the buckle 41. In other embodiments, the buckle 41 and the buckle 42 can be other matched shapes. Meanwhile, in the embodiment, the buckle 41 and the buckle 42 are molded by metal (aluminum, zinc alloy) or non-metal (ABS, PP, nylon) materials. The surface of the side of the buckle 41 away from the accommodating groove 411 can be provided with an identification pattern or text, so as to increase the recognition.

[0036] In a specific embodiment, the support plate 1 is provided with a plurality of mounting holes 11, and the positioning column 31 is arranged to penetrate the mounting hole 11. In the embodiment, the mounting holes 11 are symmetrically arranged on the left and right sides of the support plate 1, and the backrest device plate 2 is provided with two plates. Each of the two backrest device plates 2 is provided with a set of connecting structures 3, and the two backrest device plates 2 are fixed on the left and right sides of the support plate 1 by the positioning column 31 and the locking structure 4.

[0037] In a specific embodiment, the connecting structure 3 further includes a connecting piece 32 and a positioning plate 33. The positioning column 31 and the connecting piece 32 are fixed on the two sides of the positioning plate 33, respectively, and the connecting piece 32 is fixed on the backrest device plate 2 away from the positioning plate 33, so as to realize the fixed connection between the backrest device plate 2 and the support plate 1 by the connecting structure 3 and the locking structure 4.

[0038] Further, the number of the positioning columns 31 is several, and the several positioning columns 31 are arranged in a row, so as to be slid into the accommodating groove 411. In the embodiment, the number of the positioning columns 31 is three, and the three positioning columns 31 are arranged at equal intervals.

[0039] Please refer to Figure 7In another embodiment, the number of positioning columns 31 is several, and the several positioning columns 31 are arranged in two parallel rows, the accommodating grooves 411 are provided with two, and the groove walls of the two accommodating grooves 411 are respectively connected to the limiting grooves 311 on each row of positioning columns 31. Here, the number of positioning columns 31 is six, and the six positioning columns 31 are arranged in two parallel rows at equal distances. When the two rows of positioning columns 31 are respectively slid into the two accommodating grooves 411, the groove walls of the two accommodating grooves 411 are respectively connected to the limiting grooves 311 on each row of positioning columns 31, and the structure strength can be enhanced by arranging the two rows of positioning columns 31 in cooperation with the locking structure 4.

[0040] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A backrest device having a locking structure, characterized by: The application relates to a backrest device plate, a support plate, a connecting structure and a locking structure. The connecting structure is arranged on the backrest device plate, the connecting structure is provided with a positioning column, a positioning groove is formed in the side of the positioning column, the positioning column penetrates the support plate, and the locking structure is detachably connected to the positioning column. The locking structure comprises a fastener and a buckle, the fastener is internally provided with a containing groove from the bottom, one side of the fastener is provided with an opening communicating with the containing groove, the positioning column is slidably connected to the containing groove from the opening, the groove wall of the containing groove is connected to the positioning groove, and the buckle is rotationally connected to the fastener to close the opening.

2. The backrest device with a locking structure according to claim 1, characterized in that, The cross section of the fastener along the width direction is C-shaped.

3. The backrest device with a locking structure according to claim 1, characterized in that, Two sides of the fastener are respectively provided with connecting holes, the buckle is provided with rotating shafts at the corresponding positions, and the rotating shafts are rotationally connected to the connecting holes.

4. The backrest device with a locking structure according to claim 1, characterized in that, Two sides of the fastener are respectively provided with limiting grooves, the buckle is provided with limiting blocks at the corresponding positions, and when the buckle is rotated to the position of closing the opening, the limiting blocks are contained in the limiting grooves.

5. The backrest device with locking structure according to claim 1, characterized in that, The buckle is U-shaped.

6. The backrest device with locking structure according to claim 1, characterized in that, The support plate is provided with a plurality of mounting holes penetrating the support plate, and the positioning column penetrates the mounting hole.

7. The backrest device with a locking mechanism according to claim 6, characterized in that The mounting holes are symmetrically arranged on the left and right sides of the support plate, and the backrest device plate is provided with two plates.

8. The backrest device with locking structure according to claim 1, characterized in that, The connecting structure further comprises a connecting piece and a positioning plate, the positioning column and the connecting piece are respectively fixed on the two sides of the positioning plate, and the connecting piece is arranged on the backrest device plate.

9. The backrest device with locking structure according to claim 1, characterized in that, The number of the positioning columns is several, and the several positioning columns are arranged in one row.

10. The backrest device with a locking structure according to claim 1, characterized in that, The number of the positioning columns is several, and the several positioning columns are arranged in two parallel rows, the containing groove is provided with two, and the groove walls of the two containing grooves are respectively connected to the positioning grooves on each row of the positioning columns.

Images