CN108644191A - A kind of built-in pressure expansion self-locking structural casing - Google Patents

Abstract

The invention discloses a casing with a built-in pressure telescopic self-locking structure, which includes an outer tube and an inner tube that can slide in the outer tube. The inner tube is connected with an extruded part, and an extruded part is arranged between the extruded part and the outer tube. Squeeze and expand to realize the locking of the outer tube and the inner tube. One end of the elastic sleeve is connected to the guide. Pipe connection sleeve, the extrusion piece is connected with the guide piece that rotates with the extrusion piece to achieve axial movement so that the elastic sleeve is extruded from the extrusion piece. The guide piece is equipped with a screw connected to the extrusion piece, and the screw rod is sleeved There is a spring connected to the screw at one end and connected to the guide at the other end. The extruded part is provided with an outer tapered surface, and the elastic sleeve is provided with an inner inclined surface matching the outer tapered surface. The stretching is realized by directly stretching the inner and outer tubes, and through The outer tube and the inner tube are twisted to realize unlocking and shrinking, and the operation is simple and convenient.

Description

A built-in pressure telescopic self-locking structural casing

[technical field]

The invention relates to a casing with a built-in pressure telescopic self-locking structure.

[Background technique]

The existing telescopic self-locking structure applied to the telescopic sleeve of the photographic frame realizes locking and fixing or unlocking and stretching between the two sleeves by rotating the mounting sleeve. Therefore, when the length of the sleeve is adjusted many times, it is necessary to repeatedly rotate the mounting sleeve to lock Locking and unlocking, the operation is cumbersome, especially inconvenient to adjust the length between the tripod sleeves of the photography tripod, and at the same time, when the locking and fixing of the rotating mounting sleeve is forgotten or the rotating locking is not in place, it is easy to lose balance during use and break the equipment.

[Content of the invention]

The present invention overcomes the shortcomings of the above-mentioned technologies, and provides a sleeve with a built-in pressure telescopic self-locking structure, which can be stretched by directly stretching the inner and outer tubes, and can be unlocked and contracted by twisting the outer and inner tubes, which is easy to operate.

To achieve the above object, the present invention adopts the following technical solutions:

A sleeve with a built-in pressure telescopic self-locking structure, including an outer tube 1 and an inner tube 2 that can slide in the outer tube 1, the inner tube 2 is connected with an extruded part 3, and the extruded part 3 is connected to the outer tube 1 There is an elastic sleeve 4 that is extruded and expanded by the extruded part 3 to realize the locking of the outer tube 1 and the inner tube 2. One end of the elastic sleeve 4 is connected to the guide 5, and the other end of the elastic sleeve 4 is provided with a sleeve. The inner tube 2 is connected with the outer tube 1 and is used to prevent the inner tube 2 from sliding out of the outer tube 1. The extruded part 3 is connected with the extruded part 3 to rotate axially so as to make the elastic The sleeve 4 is separated from the guide 5 extruded by the extruded part 3. The guide 5 is provided with a screw 7 connected to the extruded part 3. The screw 7 is provided with one end connected with the screw 7 and the other end connected with the guide. The spring 8 connected to the piece 5, the extruding piece 3 is provided with an outer tapered surface 23, and the elastic sleeve 4 is provided with an inner inclined surface 24 matching the outer tapered surface 23.

The inner surface of the outer tube 1 is provided with an outer tube guide rib 9, and the guide member 5, the elastic sleeve 4 and the outer tube connecting sleeve 6 are respectively provided with guide grooves 10, Elastic sleeve guide groove 11 and outer tube connection sleeve guide groove 12.

The outer tube 1 is provided with a positioning through hole 13 , and the outer tube connecting sleeve 6 is provided with a positioning protrusion 14 engaged with the positioning through hole 13 .

The extrusion part 3 is provided with an extrusion part notch 15, and the extrusion part notch 15 is provided with a notch guiding slope 16, and the said guide part 5 is provided with an extrusion part engaging with the extrusion part notch 15. The guide block 17 is provided with a block guide slope 18 that cooperates with the notch guide slope 16 to realize mutual axial movement.

The guide member 5 is provided with a guide member protruding ring 19 , and the elastic sleeve 4 is provided with an elastic sleeve groove 20 engaged with the guide member protruding ring 19 .

A guide block 21 is arranged inside the guide 5 , and one end of the spring 8 is connected to the guide block 21 .

The guide member 5 is provided with a guide member positioning projection 22 for limiting the connecting position of the screw rod 7 .

The extrusion part 3 is threadedly connected with the screw rod 7 .

The inner tube 2 is fixedly connected to the extruded part 3 .

The beneficial effects of the present invention are:

The invention has a super-strong locking force, and the length adjustment can be realized only by stretching the inner and outer tubes. When shrinking, only the outer tube and the inner tube need to be twisted each other, and the extrusion part and the guide part can be aligned through the concave guide slope and the bump guide slope. Unlocking is realized by axial movement, the structure is simple and maintenance-free, and the stability is high, and no external force is required to perform a separate locking operation for each section to realize the locking between casings. The operation is simple and convenient. The invention can use multiple telescopic structures at the same time without Increase operation difficulty and operation time.

[Description of drawings]

Fig. 1 is a structural representation of the present invention;

Fig. 2 is one of exploded views of the present invention;

Fig. 3 is the second exploded view of the present invention;

Fig. 4 is the third exploded view of the present invention;

Fig. 5 is a cross-sectional view of the assembly of the extrusion part, the guide part and the elastic sleeve of the present invention;

Fig. 6 is a schematic diagram of the guide of the present invention.

[Detailed ways]

A further detailed description will be made below in conjunction with the accompanying drawings and embodiments of the present invention:

As shown in Figure 1-6, a casing with a built-in pressure telescopic self-locking structure includes an outer tube 1 and an inner tube 2 that can slide in the outer tube 1, the inner tube 2 is connected with an extruded part 3, the Between the extruded part 3 and the outer tube 1, there is an elastic sleeve 4 which is extruded and expanded by the extruded part 3 to realize the locking of the outer tube 1 and the inner tube 2. One end of the elastic sleeve 4 is connected to the guide member 5, and the elastic The other end of the sleeve 4 is provided with an outer tube connecting sleeve 6 which is sleeved outside the inner tube 2 and connected to the outer tube 1 and is used to prevent the inner tube 2 from slipping out of the outer tube 1. The extruded part 3 is connected with the extruded part 3. The rotation realizes axial movement so that the elastic sleeve 4 is separated from the guide piece 5 extruded by the extrusion piece 3. The guide piece 5 is provided with a screw rod 7 connected with the extrusion piece 3. The screw rod 7 is sleeved with one end and The screw 7 is connected to the spring 8 whose other end is connected to the guide member 5 . The extruding member 3 is provided with an outer tapered surface 23 , and the elastic sleeve 4 is provided with an inner inclined surface 24 matching the outer tapered surface 23 .

Wherein, the extrusion part 3 is provided with an extrusion part notch 15, and the extrusion part notch 15 is provided with a notch guide slope 16, and the guide part 5 is provided with an extrusion part notch 15. The engaged guide block 17 is provided with a block guide slope 18 that cooperates with the notch guide slope 16 to achieve mutual axial movement.

When stretching, just hold the outer tube 1 and pull out the inner tube 2 to the required length. During the stretching process, the guide 5 is pulled by the friction between the outer tube 1 and the elastic sleeve 4, and the inner tube 2 is pulled and squeezed The piece 3 is pulled in the opposite direction, and the spring 8 is compressed, so that the outer tapered surface 23 of the extrusion piece 3 and the inner slope 24 of the elastic sleeve 4 are staggered, and the elastic sleeve 4 shrinks, that is, the friction between the elastic sleeve 4 and the outer tube 1 is reduced. , so that the inner tube 2 drives the elastic sleeve 4 to slide in the outer tube to adjust the length; when the length adjustment is completed, that is, when the inner tube 2 is not pulled, the spring 8 is reset, and the guide member 5 is pushed to drive the elastic sleeve 4 to slide toward the extrusion part 3, so that The extrusion part 3 squeezes the elastic sleeve 4 to expand to increase the friction between the elastic sleeve 4 and the outer tube 1, so that there is a certain locking force between the elastic sleeve 4 and the outer tube 1, and the outer tube 1 and the inner tube 2 are realized. When the inner tube 2 is stretched out to the maximum length, the outer tube connecting sleeve 6 acts as a limiter, blocking the elastic sleeve 4 so as to prevent the inner tube 2 from being pulled out of the outer tube 1.

When shrinking, hold the outer tube 1 and the inner tube 2 with both hands, and twist each other. At this time, the notch guiding slope 16 on the notch 15 of the extrusion part and the bump guiding slope 18 on the guide part 5 interact with each other. Move, so that the extrusion part 3 and the elastic sleeve 4 move in the opposite direction, that is, the outer tapered surface 23 of the extrusion part 3 and the inner slope 24 of the elastic sleeve 4 are staggered, and the elastic sleeve 4 shrinks, that is, the gap between the elastic sleeve 4 and the outer tube 1 The frictional force is reduced, and now the inner tube 2 can be shrunk into the outer tube 1.

Wherein, when the outer tube 1 and the inner tube 2 slide to the maximum length, the outer tube connecting sleeve 6 blocks the elastic sleeve 4, and prevents the extruded part 3 connected with the elastic sleeve 4 from sliding out, that is, blocks the extruded part 3 connected The inner tube 2 is separated from the outer tube 1 .

The inner surface of the outer tube 1 is provided with an outer tube guide rib 9, and the guide member 5, the elastic sleeve 4 and the outer tube connecting sleeve 6 are respectively provided with guide grooves 10, The elastic sleeve guide groove 11 and the outer tube connecting sleeve guide groove 12 prevent the rotation between the elastic sleeve 4 and the guide member 5 and the outer tube 1 .

The outer tube 1 is provided with a positioning through hole 13, and the outer tube connecting sleeve 6 is provided with a positioning protrusion 14 engaged with the positioning through hole 13, so as to better stabilize the outer tube 1 and the outer tube connecting sleeve 6 connect.

The guide member 5 is provided with a guide member protruding ring 19, and the elastic sleeve 4 is provided with an elastic sleeve groove 20 engaged with the guide member protruding ring 19 to improve the connection stability between the guide member 5 and the elastic sleeve 4 .

A guide block 21 is provided inside the guide 5 , and one end of the spring 8 is connected to the guide block 21 , so that the spring 8 is reset to push the guide 5 .

The extruded part 3 is threadedly connected with the screw rod 7, and the guide part 5 is provided with a guide part positioning projection 22 for limiting the connection position of the screw rod 7, so as to prevent the screw rod 7 from being completely compressed when the extruded part 7 is screwed together. The spring 8 sleeved on the screw rod 7.

The inner tube 2 is fixedly connected to the extruded part 3 .

Claims (9)

1. a kind of built-in pressure expansion self-locking structural casing, it is characterised in that：Include outer tube (1) and can be in the outer tube (1) The inner tube (2) of sliding, said inner tube (2) are connected with extrusion (3), are equipped with and are squeezed between the extrusion (3) and outer tube (1) Part (3) extrusion expansion realizes the resilient sleeve (4) of outer tube (1) and inner tube (2) locking, described resilient sleeve (4) one end and guide part (5) Connection, resilient sleeve (4) other end are connect with outer tube (1) and equipped with inner tube (2) is set in for stopping that inner tube (2) skids off outside The outer pipe connector sleeves (6) of outer tube (1), the extrusion (3) be connected with extrusion (3) mutually rotation realize axial movement to So that resilient sleeve (4) is detached from the guide part (5) that extrusion (3) squeezes, is equipped in the guide part (5) and to be connect with extrusion (3) Screw rod (7), be arranged on the screw rod (7) one end connect with screw rod (7), the spring (8) of the other end and guide part (5) connection, The extrusion (3) is externally provided with male cone (strobilus masculinus) (23), and the outer inclined-plane coordinated with male cone (strobilus masculinus) (23) is equipped in the resilient sleeve (4) (24)。

2. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：The outer tube (1) Medial surface is equipped with outer tube and is oriented to rib (9), be respectively equipped on the guide part (5), resilient sleeve (4) and outer pipe connector sleeves (6) and Outer tube is oriented to guide part guide groove (10), resilient sleeve guide groove (11) and the outer pipe connector sleeves guide groove (12) that rib (9) coordinates.

3. a kind of built-in pressure expansion self-locking structural casing according to claim 1 or 2, it is characterised in that：The outer tube (1) it is equipped with positioning through hole (13), the outer pipe connector sleeves (6) are equipped with the locating convex block engaged with positioning through hole (13) (14)。

4. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：The extrusion (3) it is equipped with extrusion recess (15), the extrusion recess (15) is equipped with recess guiding surface (16), the guide part (5) it is equipped with the guide part convex block (17) engaged with extrusion recess (15), the guide part convex block (17) is equipped with and recess The convex block guiding surface (18) moved axially each other is realized in guiding surface (16) cooperation.

5. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：The guide part (5) it is equipped with guide part bulge loop (19), the resilient sleeve groove engaged with guide part bulge loop (19) is equipped in the resilient sleeve (4) (20)。

6. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：The guide part (5) guide part fixture block (21) is equipped in, described spring (8) one end is connect with guide part fixture block (21).

7. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：The guide part (5) the guide positions convex block (22) for limiting screw rod (7) link position is equipped in.

8. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：The extrusion (3) it is threadedly coupled between screw rod (7).

9. a kind of built-in pressure expansion self-locking structural casing according to claim 1, it is characterised in that：Said inner tube (2) It is fixedly connected between extrusion (3).