Patent Description:
In a frame structure, it is often necessary to connect different components. A conventional manner is welding or screw connection, which is not only time-consuming and laborious, but also inconvenient for repeated disassembly and assembly.

The Chinese utility model patent with the publication number <CIT> discloses a quick installation structure, including a socket, a bolt and a bolt base. The socket is provided with a slot, and the slot is provided with clamping blocks which can be retracted into inner walls of the slot. One end of the bolt is provided with clamping grooves in one-to-one correspondence with the clamping blocks, and the bolt is clamped with the clamping grooves through the clamping blocks. During installation, the socket and the bolt base are respectively connected to different components needing to be connected, and then, the bolt is inserted into the socket to complete quick connection between two components. When disassembly is needed, it is only necessary to apply a reverse pulling force to the two connected components to withdraw the bolt from the socket. Therefore, the installation and disassembly are very convenient. In addition, a tail end of the bolt can slide in the bolt base, and a clamping device is provided between the bolt and the socket. A distance between the two connected components can be adjusted within a certain range, so that the ability to adjust the production accuracy of the frame structure during installation is very good.

However, the above technical solution still has the following problems.

The French patent <CIT> discloses a connector and <CIT> another connector as defined in the preamble of claim <NUM>.

The technical problem to be solved by the present invention is to provide a connector and a frame structure using the same. The connector achieves quick disassembly and assembly, and also has the advantages of reliable connection, convenient disassembly and assembly and long service life.

In order to solve the above technical problem, the technical solution provided by the present invention is as follows: a connector at least includes:.

Each expansion arm is provided with clamping teeth on a surface corresponding to the inner wall of the slot, the side wall of the slot is provided with limiting teeth corresponding to the clamping teeth, and the clamping teeth are meshed with the limiting teeth in a connected state. The expansion arm and the slot are connected by the meshing of the clamping teeth. In addition to the friction force, an interaction force between the clamping teeth and the limiting teeth can also bear the load together, so that the reliability of connection is better.

An end part of the acting end is provided with a first limiting block, and a side surface of the first limiting block away from the acting end is provided with a chamfer. The connector is configured so that, after the installation is completed, the first limiting block passes through the expansion channel and abuts against the expansion arm, so as to prevent the expansion bolt from retreating from the expansion channel to improve the reliability of connection.

The bolt main body is based on the standard that it can move freely in the slot along the length direction of the slot in a natural state. In a connected state, the expansion arm is inserted into the slot, the acting end of the expansion bolt is inserted from an expansion bolt channel and opens the expansion arms to an inner wall direction of the slot, finally, the expansion arm is in contact with an inner wall of the slot, and tight connection is achieved through an acting force between the expansion arm and the inner wall of the slot.

When disassembly is needed, it is only necessary to apply a reverse acting force to an operating end of the expansion bolt away from the acting end, and then, the expansion bolt can be pulled out of the slot. When the expansion force of the expansion bolt acting on the expansion arm disappears, the expansion arm is reset and separated from the inner wall of the slot, and then, the expansion arm can be removed from the slot to complete the disassembly operation.

The connector achieves quick assembly and disassembly between two components to be connected, and has certain gap adjustment capability and good adaptability.

On the basis of achieving quick disassembly and assembly, compared with the prior art, the present application further has the following beneficial effects.

Preferably, the slot is cylindrical, and the expansion arms are uniformly distributed in a ring shape.

Preferably, a cross section of the slot is rectangular, and at least one pair of the expansion arms are distributed relatively.

Preferably, the expansion arm includes a connecting block, an inner side of the connecting block is provided with a transition slope at the end close to the bolt main body, and the expansion bolt is provided with a second limiting block corresponding to the transition slope and compressing the transition slope. The second limiting block is configured to compress the transition slope to prevent the expansion arm from sinking downward on the side close to the bolt main body, and separating from the inner wall of the slot, thus ensuring that there is a sufficient contact area between the expansion arm and the side wall of the slot to improve the reliability of connection.

Preferably, a limiting groove corresponding to the connecting block is formed between the first limiting block and the second limiting block, the limiting groove is internally provided with a plurality of bulges for compressing the connecting block, and the highest point of the bulge is lower than that of the first limiting block and the second limiting block. The setting of the bulges can ensure that a pressing force of the slot and the expansion bolt on the connecting block is stable and reliable, thereby further improving the reliability of connection.

A frame structure includes a sectional material I, a sectional material II and the aforementioned connector. The socket is detachably connected with the sectional material I, the bolt is detachably connected with the sectional material II, and the sectional material I is connected with the sectional material II through the connector.

The connector achieves quick connection and disassembly between sectional materials to be connected. When in use, the sectional materials can be directly and quickly connected at an installation site, so that the installation flexibility is better, and the cost of storage and transportation is greatly reduced.

Preferably, the sectional material II includes a cross beam and a side beam, and the cross beam is detachably connected with the side beam.

Preferably, the bolt is connected with the side beam, the bolt further includes an installation part, the installation part is provided with a preset hole, and the cross beam is connected with the side beam and the bolt through a three-in-one connector.

In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the present invention and are not intended to limit the present invention.

As shown in <FIG>, a connector at least includes a socket <NUM>, a bolt <NUM> and an expansion bolt <NUM>. As shown in <FIG>, the socket <NUM> includes a connection end <NUM>, and a slot <NUM>, which extends along a length direction of the socket <NUM> from an end surface of the connection end <NUM>, is provided on the socket <NUM>. As shown in <FIG>, the bolt <NUM> includes a bolt main body <NUM> that is adapted to the slot <NUM>, a front end of the bolt main body <NUM> is provided with at least two expansion arms <NUM>, and the bolt main body <NUM> is internally provided with an expansion channel <NUM> which traverses the bolt main body <NUM> along a length direction. As shown in <FIG>, the expansion bolt <NUM> includes a main body of the expansion bolt <NUM> that matches the expansion channel <NUM>, a front end of the main body of the expansion bolt <NUM> is provided with an acting end <NUM> that interacts with the expansion arm <NUM>, and the socket <NUM> and the bolt <NUM> are tightly connected by means of an expansion force that is generated by the acting end <NUM> opening the expansion arms <NUM>.

As shown in <FIG>, the bolt main body <NUM> is based on the standard that it can move freely in the slot <NUM> along a length direction of the slot <NUM> in a natural state. In a connected state, the expansion arm <NUM> is inserted into the slot <NUM>, the acting end <NUM> of the expansion bolt <NUM> is inserted from a channel of the expansion bolt <NUM> and opens the expansion arms <NUM> to an inner wall direction of the slot <NUM>, finally, the expansion arm <NUM> is in contact with an inner wall of the slot <NUM>, and tight connection is achieved through an acting force between the expansion arm <NUM> and the inner wall of the slot <NUM>.

As shown in <FIG> and <FIG>, shapes of the slot <NUM> and the bolt <NUM> can be set according to needs as long as the slot <NUM> and the expansion bolt <NUM> can together compress the expansion arm <NUM>, and the expansion arm <NUM> need to be reasonably arranged according to the shapes of the slot <NUM> and the bolt <NUM>. In the present embodiment, the cross section of the slot <NUM> is preferably rectangular, and at least two of the expansion arms <NUM> are distributed relatively.

When disassembly is needed, it is only necessary to apply a reverse acting force to an operating end <NUM> of the expansion bolt <NUM> away from the acting end <NUM>, and then, the expansion bolt <NUM> can be pulled out of the slot <NUM>. When the expansion force of the expansion bolt <NUM> acting on the expansion arm <NUM> disappears, the expansion arm <NUM> is reset and separated from the inner wall of the slot <NUM>, and then, the expansion arm <NUM> can be removed from the slot <NUM> to complete the disassembly operation.

Further, as shown in <FIG>, the expansion arm <NUM> is provided with clamping teeth <NUM> on a surfaces corresponding to an inner wall of the slot <NUM>, the side wall of the slot <NUM> is provided with limiting teeth <NUM> corresponding to the clamping teeth <NUM>, and the clamping teeth <NUM> are meshed with the limiting teeth <NUM> in a connected state. The expansion arm <NUM> and the slot <NUM> are connected by the meshing of the clamping teeth <NUM>. In addition to a friction force, an interaction force between the clamping teeth <NUM> and the limiting teeth <NUM> can also bear the load together, so that the reliability of connection is better.

Further, as shown in <FIG>, an end part of the acting end <NUM> is provided with a first limiting block <NUM>, and a side surface of the first limiting block <NUM> away from the acting end <NUM> is provided with a chamfer. After the installation is completed, the first limiting block <NUM> passes through the channel of the expansion bolt <NUM> and abuts against the expansion arm <NUM>, so as to prevent the expansion bolt <NUM> from retreating from the channel of the expansion bolt <NUM> to improve the reliability of connection. The expansion arm <NUM> includes a connecting block <NUM>, an inner side of the connecting block <NUM> is provided with a transition slope <NUM> at an end close to the bolt main body <NUM>, and the expansion bolt <NUM> is provided with a second limiting block <NUM> corresponding to the transition slope <NUM> and compressing the transition slope <NUM>. The second limiting block <NUM> is configured to compress the transition slope <NUM> to prevent the expansion arm <NUM> from sinking downward on the side close to the bolt main body <NUM>, and separating from the inner wall of the slot <NUM> to ensure that there is a sufficient contact area between the expansion arm <NUM> and the side wall of the slot <NUM> to improve the reliability of connection.

As shown in <FIG>, a limiting groove corresponding to the connecting block <NUM> is formed between the first limiting block <NUM> and the second limiting block <NUM>, the limiting groove is internally provided with a plurality of bulges <NUM> for compressing the connecting block <NUM>, and the highest point of the bulge <NUM> is lower than that of the first limiting block <NUM> and the second limiting block <NUM>. The setting of the bulges <NUM> can ensure that a pressing force of the slot <NUM> and the expansion bolt <NUM> on the connecting block <NUM> is stable and reliable, thereby further improving the reliability of connection.

The connector achieves quick assembly and disassembly between two components to be connected, and has certain gap adjustment capability and good adaptability. The processes of adjusting the gap and finally inserting and locking the expansion bolt <NUM> and the process of pulling out the expansion bolt <NUM> for disassembly have no need of tools and can be completed manually by installation personnel, the operation is simple, and the use is convenient. During normal use, the load is borne by the friction force between the socket <NUM> and the expansion arm <NUM>. Once a sudden situation occurs, such as a sudden increase in load, the expansion arm <NUM> and the bolt main body <NUM> are broken. In the present application, the operating end <NUM> of the expansion bolt <NUM> can be set larger in size and can abut against the bolt <NUM> in a connected state, so as to prevent the sudden separation between the connected components to improve the safety of connection.

Compared with the quick disassembly and assembly structure in the background art, there is no connection gap between the expansion arm <NUM> and the slot <NUM>, and even if the load is suddenly reversed, there will be no impact load. Furthermore, in a connected state, the socket <NUM> and the expansion arm <NUM> are relatively stationary and cannot shake, so that the structural stability is better. According to the connector of the present application, the gap between the two components to be connected is adjusted through the length of the bolt main body <NUM> inserted into the slot <NUM>. Compared with the quick disassembly and assembly structure in the background art, no base of the bolt <NUM> is provided, and the overall length of the connector is greatly reduced, which facilitates the installation and use of the connector.

As shown in <FIG> and <FIG>, a frame structure includes a sectional material I <NUM>, a sectional material II <NUM> composed of a cross beam <NUM> and a side beam <NUM>, and the aforementioned connector. The bolt <NUM> further includes an installation part <NUM>, the installation part <NUM> is provided with a preset hole <NUM> corresponding to a three-in-one connector <NUM>, and the cross beam <NUM> is connected with the side beam <NUM> through the three-in-one connector <NUM>. The socket <NUM> is detachably connected with the sectional material I <NUM>, the bolt <NUM> is detachably connected with the sectional material II <NUM>, and the sectional material I <NUM> is connected with the sectional material II <NUM> through the connector. The connector achieves quick connection and disassembly between sectional materials to be connected. When in use, the sectional materials can be directly and quickly connected at an installation site, so that the installation flexibility is better, and the cost of storage and transportation is greatly reduced.

It should be noted that the three-in-one connector <NUM> has been widely applied to the prior art, especially the furniture industry. For example, the Chinese invention patent with the publication number <CIT> discloses a detachable connection device for a hollow extruded plastic board, and the structure and functions of the device are the same as those of the three-in-one connector. In the present application, it is merely applied to this field, and the specific structure of the three-in-one connector <NUM> is not improved, therefore, the structure of the three-in-one connector <NUM> is not described in detail.

Claim 1:
A connector, at least comprising:
a socket (<NUM>), comprising a connection end (<NUM>), wherein a slot (<NUM>), which extends along a length direction of the socket (<NUM>) from an end surface of the connection end (<NUM>), is provided on the socket (<NUM>);
a bolt (<NUM>), comprising a bolt main body (<NUM>) that is adapted to the slot (<NUM>), wherein a front end of the bolt main body (<NUM>) is provided with at least two expansion arms (<NUM>), and the bolt main body (<NUM>) is internally provided with an expansion channel (<NUM>) which traverses the bolt main body (<NUM>) along a length direction; and
an expansion bolt (<NUM>), the expansion bolt (<NUM>) comprising an expansion bolt main body that matches the expansion channel (<NUM>), wherein a front end of the expansion bolt main body is provided with an acting end (<NUM>) that interacts with the expansion arms (<NUM>), and the socket (<NUM>) and the bolt (<NUM>) are tightly connected by means of an expansion force that is generated by the acting end (<NUM>) opening the expansion arms (<NUM>); each expansion arm (<NUM>) is provided with clamping teeth (<NUM>) on surfaces corresponding to the inner walls of the slot (<NUM>), the side walls of the slot (<NUM>) are provided with limiting teeth (<NUM>) corresponding to the clamping teeth (<NUM>), and the clamping teeth (<NUM>) are meshed with the limiting teeth (<NUM>) in a connected state, characterized in that an end part of the acting end (<NUM>) is provided with a first limiting block (<NUM>), and a side surface of the first limiting block (<NUM>) away from the acting end (<NUM>) is provided with a chamfer, wherein the connector is configured so that, after the installation is completed, the first limiting block (<NUM>) passes through the expansion channel (<NUM>) and abuts against the expansion arm (<NUM>), so as to prevent the expansion bolt (<NUM>) from retreating from the expansion channel (<NUM>) to improve the reliability of connection.