CN216867215U - Adapter and chair back frame - Google Patents

Abstract

The utility model relates to an adapter and a chair back frame, which comprise two adapters, a groove and a boss, wherein the groove and the boss are clamped and rotated; the side surfaces of the connecting parts form abutting surfaces, the top surfaces of the connecting parts are provided with limiting surfaces and avoidance arc surfaces adjacent to the limiting surfaces, one of the connecting parts is provided with a bolt through hole, and the other connecting part is provided with a threaded hole; a bolt is arranged in the bolt through hole; the adapter has a vertical state and a turnover state; in the overturning state, one adapter rotates forwards and is vertical to the other adapter; when being in vertical state, when receiving decurrent effort, spacing face and grafting portion top surface support the press fit and can prevent that it from continuing to rotate backward, cooperate the block of upper groove and boss to confront decurrent effort jointly, have improved holistic fastness and bending resistance.

Description

Adapter and chair back frame

Technical Field

The utility model belongs to the technical field of switching, and particularly relates to a switching device and a chair back frame.

Background

In daily life, a long tool or device is often used, but the bending resistance of the tool or device is poor due to the length of the tool or device, and the tool or device is usually divided into a plurality of parts and then connected with each other through adapters in order to prolong the service life of the tool or device, so that the bending resistance is improved, and the tool or device is convenient to package and transport. For example, in the application of the chair back frame, the traditional integrally formed chair back frame has good integrity, but is easy to bend after being pressed for many times when in use, so that the chair back frame is divided into two parts to be connected through the adapter, the transportation is convenient, the shearing force generated by the back of a human body to the chair back frame when the back of the human body leans backwards can be shared when in use, the existing adapter is connected together through two matching parts which can rotate through bolts, and then device parts needing to be switched are respectively inserted into the end parts of the two matching parts. Although the device components can be protected, because the adapter shares a larger part of shearing force, the bolts used for connection in the traditional adapter are easy to bend, deform and even break when being subjected to the shearing force, and need to be replaced frequently, which is very troublesome.

Disclosure of Invention

In order to solve the above-mentioned problems, an object of the present invention is to provide an adapter and a seat back frame, which can greatly improve the bending and shearing resistance and the firmness of the adapter and the seat back frame.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an adapter comprises two adapters which are mutually matched, and a groove and a boss which can be matched, clamped and rotated in a matching mode, wherein the adapters comprise an inserting part and a connecting part which are integrally connected, the bottom end of the connecting part is connected to the top end of the inserting part, and the size of the connecting part in the width direction of the connecting part is smaller than that of the inserting part, so that a deflection space is formed beside the connecting part; the side surface of the connecting part forms a butt joint surface, the top surface of the connecting part is provided with a limiting surface and an avoiding arc surface adjacent to the limiting surface, and an avoiding notch formed by inward contraction of the avoiding arc surface enables the two adapters to rotate forwards relatively; one of the connecting parts is provided with a bolt through hole, and the other connecting part is provided with a threaded hole; bolts for splicing and fixing the two adapters are arranged in the bolt through holes; the groove is arranged on one side of the joint of the bolt through hole and the threaded hole, and the boss is arranged on the other side; the adapter has two states: a vertical state and a turning state; in the overturning state, one adapter rotates forwards and is vertical to the other adapter; when being in vertical state, two adapters all are in vertically, and when one of them adapter received backward effort, spacing face support press at grafting portion top surface and recess and boss joint jointly with backward effort forms the antagonism.

The adapter is used for connecting two sections of outside carriers and splices into a whole, and grafting portion is used for pegging graft with the carrier, and connecting portion are used for connecting two adapters, and the space of letting partially that forms at the connecting portion side after connecting portion and grafting portion are connected can make connecting portion can form regular whole, the in-service use and the aesthetic property of being convenient for with grafting portion after the concatenation. When the concatenation, carry out the butt with the butt face of two connecting portion, two connecting portions are in the inclined to one side of side respectively this moment and let in the space, recess and boss block together this moment, then connect fixedly through the bolt with two adapters. When using, the adapter has two kinds of states, and when being in under the upset state, the breach of dodging that sets up the formation of spacing cambered surface internal contraction makes the adapter can take place to rotate forward, and is rotatable to keep perpendicular with another adapter. When under the vertical state, the adapter can receive backward effort under the pressure of supporting of external pressure, because spacing face and grafting portion top surface support the pressure, has restricted the adapter and has continued backward rotation, and the joint of recess and boss has born most shearing force, forms jointly to resist with backward effort, and the bolt has only played the effect of connecting this moment.

Preferably, the groove is formed in an abutting surface at the hole opening of the bolt, and the boss is formed on the abutting surface at the hole opening of the bolt and faces the groove.

Recess and boss carry out the block when connecting portion splice promptly, set up respectively in bolt via hole and screw hole opposite side, and the bolt can pass in recess and the boss for produce between the adapter and all born by recess and boss by the shearing force, and the bolt only plays the effect of connecting.

Preferably, the plug part is a flat hollow tubular structure, and the wall thickness of the front side of the plug part is larger than the wall thickness of the two adjacent sides and the wall thickness of the rear side of the plug part. When the plug part receives a backward acting force, the front side of the plug part is a weak stress part, so that the plug part is easy to break from the weak stress part, and the front side wall is thick and can greatly reduce the risk of breakage.

Preferably, the rear side of the insertion part is provided with an opening convenient for insertion with an external carrier, a thickened wall is arranged on the side wall of the bottom end inside the insertion part, and the wall thickness of the rear side of the thickened wall is greater than the wall thicknesses of two adjacent sides and the front side of the thickened wall.

The setting of grafting portion rear side open-ended then has improved the convenience of installation greatly, when the installation, need be in the same place grafting portion and outside carrier grafting, the rear side open-ended only need when the installation aim at the front side then along the front side insert can, also can guarantee the holistic rigidity of grafting portion simultaneously. The thickened wall is arranged to reduce the risk of fracture of the insertion part, and the reason that the wall thickness of the rear side of the thickened wall is larger than that of the other sides is that when the insertion part is subjected to backward acting force, stress applied to the rear side of the insertion part at the end part is concentrated, the risk of deformation and fracture is easy to occur, and the thickened wall plays a role in reinforcement.

Preferably, the two side walls of the insertion part along the width direction are provided with convex strips for fastening insertion. The arrangement of the convex strip is to ensure that the inserting part is more compact and stable after being inserted with an external carrier.

Preferably, a hidden hole for screwing the retractable bolt is further formed in the bolt through hole on one side of the connecting part.

The arrangement of hiding the hole is in order to hide the outstanding part of bolt, prevents that the outside from touching not only to influence the use and still cause the condition of becoming flexible easily, hides the hole and hides the outstanding part of bolt and also can improve holistic aesthetic property.

Applying the adapter to a back frame comprising an upper frame, a lower frame and the adapter as described above, the upper frame and the lower frame being hollow inside; the two plug-in parts on the adapter which are rotationally connected through the bolt are respectively plugged into the lower end of the upper frame and the upper end of the lower frame.

The back of the chair frame can reduce the easy cracked possibility that causes of back of the chair frame length overlength through the setting of upper portion frame and lower part frame, the produced pressure of supporting of people when leaning on can be born in the connection of adapter, the partial transfer of the power that receives original back of the chair frame to the adapter, the state of the vertical state of adapter when using promptly has improved anti buckling performance simultaneously, and the upset state has then reduced the space that the back of the chair frame occupy, convenient packing transportation and putting.

Compared with the prior art, the utility model has the beneficial effects that:

the offset space formed by the connection of the connecting part and the inserting part can ensure that the connecting part and the inserting part form a regular whole after being spliced, so that the connecting part and the inserting part are conveniently connected and matched with an external carrier for use, the two adapters can rotate relatively around a bolt for connecting the two adapters, and one adapter rotates forwards to be vertical to the other adapter in a turning state; the block of recess and boss makes under vertical state, when receiving backward effort, spacing face and grafting portion top surface support the press fit and can prevent that it from continuing to rotate backward, cooperate the block of upper groove and boss to confront backward effort jointly, improved holistic fastness and anti buckling performance greatly.

The wall thickness increase of lateral wall and the setting that adds the wall around the grafting portion also all are for reducing the cracked risk of adapter and improving its anti performance of buckling, and the setting of sand grip is also for the stability of further fastening grafting, and hidden hole then prevents the inconvenience when using and touch the not hard up that leads to, also plays pleasing to the eye effect simultaneously.

Drawings

FIG. 1 is a schematic view of the overall structure of the connection of a back frame and an adapter according to the present invention;

figure 2 is an exploded view of the back frame and adapter of the present invention;

figure 3 is a schematic diagram of an exploded front side of an adapter according to the present invention;

figure 4 is a first schematic diagram of an explosion structure behind the adapter of the present invention;

figure 5 is a second schematic diagram of the rear side explosion structure of the adapter of the present invention;

figure 6 is a top view of an adapter of the present invention.

Description of the drawings: 1. an adapter; 2. a bolt; 3. passing a hole through a bolt; 4. a plug-in part; 5. a connecting portion; 6. a groove; 7. a boss; 8. a deflection space; 9. avoiding the arc surface; 10. an opening; 11. adding a rear section; 12. a convex strip; 13. hiding the hole; 14. an upper frame; 15. a lower frame; 16. an abutting surface; 17. a limiting surface.

Detailed Description

The following describes a detailed embodiment of the present invention with reference to the accompanying drawings.

In the embodiment, an adapter is specifically disclosed, as shown in fig. 1 to 6, the adapter includes two adapters 1 that are adapted to each other, and a groove 6 and a boss 7 that are adapted to be clamped and rotated, where the adapter 1 includes an insertion portion 4 and a connection portion 5 that are integrally connected, a bottom end of the connection portion 5 is connected to a top end of the insertion portion 4, and a size of the connection portion 5 in a width direction thereof is smaller than that of the insertion portion 4, so that an offset space 8 is formed beside the connection portion 5; the side surface of the connecting part 5 forms a butt joint surface 16, the top surface of the connecting part 5 is provided with a limiting surface 17 and an avoiding arc surface 9 adjacent to the limiting surface 17, and an avoiding gap formed by inward contraction of the avoiding arc surface 9 enables the two adapters 1 to rotate forwards relatively; one connecting part 5 is provided with a bolt through hole 3, and the other connecting part 5 is provided with a threaded hole; a bolt 2 for splicing and fixing the two adapters 1 is arranged in the bolt through hole 3; the groove 6 is arranged on one side of the joint of the bolt through hole 3 and the threaded hole, and the boss 7 is arranged on the other side; the adapter has two states: a vertical state and a turning state; in the overturning state, one adapter 1 rotates forwards and is vertical to the other adapter 1; when being in vertical state, two adapter 1 all are in vertically, and when one of them adapter 1 received backward effort, spacing face 17 supported press at grafting portion 4 top surface and recess 6 and boss 7 joint jointly with backward effort forms the antagonism.

When in actual use, connect adapter 1 earlier through bolt 2, adapter 1 is formed by connecting portion 5 and 4 body coupling of grafting portion again, and what form at connecting portion 5 side lets the connecting portion 5 that space 8 can the holding of another adapter 1 partially, consequently can splice and form a comparatively regular whole, is convenient for install and use and shares the atress. After connection, the abutting surfaces 16 of the connecting parts 5 abut against each other, the grooves 6 and the bosses 7 are also tightly clamped, and the inserting parts 4 positioned at two ends after connection are respectively inserted into the external carrier. At this time, the adapter 1 has two states after being connected, the two states correspond to different application scenes respectively, and in the turning state, the two adapters 1 rotate relatively through the avoidance arc surface 9 arranged on the connecting part 5 to form a mutually perpendicular state, so that the two external carriers are also in a perpendicular state; and when receiving a backward effort under vertical state, two adapter 1 also can remain vertical throughout, the spacing face 17 of connecting portion 5 supports the top surface that presses grafting portion 4 and forms spacingly, prevent that it from continuing to rotate backward, cooperate the joint of upper groove 6 and boss 7 simultaneously to resist backward effort jointly, bolt 2 only has the connection effect in comparison with traditional bolt this moment, and no longer undertake the effect of shearing force, the shearing force is born after recess 6 and boss 7 block, holistic fastness and bending resistance have been improved greatly.

As shown in fig. 3-5, the groove 6 is provided on the abutment surface 16 at the orifice of the bolt passing hole 3, and the boss 7 is provided on the abutment surface 16 at the orifice of the threaded hole and faces the groove 6. The groove 6 and the boss 7 are respectively arranged at the bolt through hole 3 and the threaded hole so that the groove 6 and the boss 7 are positioned at the position of the abutting surface 16, the stress is more uniform, the shearing force in each direction is borne by the groove 6 and the boss 7, and the bolt 2 is internally arranged and only plays a role in connection.

As shown in fig. 6, the socket 4 is a flat hollow tubular structure, and the wall thickness of the front side of the socket 4 is greater than the wall thickness of the adjacent two sides and the wall thickness of the rear side.

When the plug-in part 4 receives the effort backward, plug-in part 3 front side and rear side all are the position that stress is comparatively concentrated, and the front side also breaks off easily, but with the cracked risk of greatly reduced and improve its bending resistance ability of the wall thickness thickening of front side.

As shown in fig. 4-6, the rear side of the insertion part 4 is provided with an opening 10 for facilitating insertion with an external carrier, the side wall of the inner bottom end of the insertion part 4 is provided with a thickened wall 11, and the wall thickness of the rear side of the thickened wall 11 is greater than the wall thickness of the adjacent two sides and the front side of the thickened wall 11.

The thickening wall 11 that sets up on the bottom lateral wall in grafting portion 4 has a reinforced effect, and then improves anti buckling performance, and the grafting portion 4 rear side position department that stress is comparatively concentrated during the atress, and the increase of the wall thickness of thickening wall 11 then has played further reinforced (rfd) effect.

As shown in fig. 3-4, two side walls of the inserting part 4 along the width direction thereof are provided with protruding strips 12 for fastening and inserting. The purpose of the ribs 12 is to further fasten the plug 4 during plugging, thereby improving the tightness of the connection between the adapter 1 and an external carrier.

As shown in fig. 4, a hidden hole 13 for screwing the retractable bolt 2 is further opened at the bolt through hole 3 on the side of the connecting portion 5. The setting of hiding hole 13 can hide the outstanding part of bolt 2 when the installation on the one hand and improve the aesthetic property, and on the other hand also can prevent touching when using, not only inconvenient but also cause not hard up influence overall stability easily.

As shown in fig. 1-2, the adapter is specifically applied to a back frame, which has a structure including an upper frame 14, a lower frame 15, and the adapter as described above, the upper frame 14 and the lower frame 15 being hollow inside; two insertion parts 4 of the adapter 1 which are rotatably connected through the bolts 2 are respectively inserted into the lower end of the upper frame 14 and the upper end of the lower frame 15.

Compared with the integral arrangement of the traditional chair back frame, the split type of the upper frame 14 and the lower frame 15 has poorer bending resistance of the traditional chair back frame and is easier to break, but the chair back frame is split into two parts and is connected through the adapter, so that the bending resistance of the chair back frame is greatly improved, and under two states of the adapter, when the chair back frame is in a vertical state and the back of a human body leans against the chair back frame, the adapter can bear partial pressure, so that the service life of the adapter is prolonged; on the other hand, when the adapter is in a turning state, the upper frame 14 and the lower frame 15 are in a vertical state under the driving of the rotation of the adapter 1, so that the adapter is convenient to package, transport and place.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims (7)

1. The adapter is characterized by comprising two adapters (1) which are mutually matched, a groove (6) and a boss (7) which can be matched, clamped and rotated in a matched mode, wherein each adapter (1) comprises an inserting part (4) and a connecting part (5) which are integrally connected, the bottom end of each connecting part (5) is connected to the top end of each inserting part (4), and the size of each connecting part (5) in the width direction of the connecting part is smaller than that of each inserting part (4), so that an offset space (8) is formed beside each connecting part (5); a butting surface (16) is formed on the side surface of the connecting part (5), a limiting surface (17) and an avoiding arc surface (9) adjacent to the limiting surface (17) are arranged on the top surface of the connecting part (5), and an avoiding notch formed by inward contraction of the avoiding arc surface (9) enables the two adapters (1) to rotate forwards relatively; one connecting part (5) is provided with a bolt through hole (3), and the other connecting part (5) is provided with a threaded hole; a bolt (2) for splicing and fixing the two adapters (1) is arranged in the bolt through hole (3); the groove (6) is arranged on one side of the joint of the bolt through hole (3) and the threaded hole, and the boss (7) is arranged on the other side; the adapter has two states: a vertical state and a turning state; in the overturning state, one adapter (1) rotates forwards and is vertical to the other adapter (1); when being in vertical state, two adapter (1) all are in vertically, and when one of them adapter (1) received backward effort, spacing face (17) support press in grafting portion (4) top surface and recess (6) and boss (7) joint jointly with backward effort forms the antagonism.

2. An adaptor according to claim 1, characterised in that the recess (6) is provided on an abutment surface (16) at the aperture of the bolt passing hole (3) and the boss (7) is provided on the abutment surface (16) at the aperture of the threaded hole and faces the recess (6).

3. An adaptor according to claim 1, wherein the spigot (4) is of flattened hollow tubular construction, the wall thickness of the spigot (4) being greater on the front side than on the adjacent sides and on the rear side.

4. An adapter according to claim 3, characterized in that the rear side of the plug part (4) is provided with an opening (10) for facilitating the plug connection with an external carrier, the inner bottom side wall of the plug part (4) is provided with a thickened wall (11), and the wall thickness of the rear side of the thickened wall (11) is larger than the wall thickness of the adjacent two sides and the front side of the thickened wall (11).

5. An adaptor according to claim 1, wherein the two side walls of the plug-in part (4) in the width direction thereof are provided with ribs (12) for fastening the plug-in.

6. The adapter according to claim 1, characterized in that a hidden hole (13) for screwing a retractable bolt (2) is further opened at the position of the bolt through hole (3) at one side of the connecting part (5).

7. A seat back frame, characterized in that it comprises an upper frame (14), a lower frame (15) and an adapter according to any one of claims 1 to 6, said upper (14) and lower (15) frames being hollow inside; the two insertion parts (4) on the adapter (1) which are rotationally connected through the bolt (2) are respectively inserted to the lower end of the upper frame (14) and the upper end of the lower frame (15).

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