CN104595311A - Novel sleeve stretching locking device - Google Patents

Abstract

The novel casing telescopic locking device disclosed in the present invention comprises an outer casing and an inner casing, the inner casing is slidably sleeved in the outer casing, and one end of the inner casing is provided with any locking device for fastening the inner casing in the outer casing The other end of the inner sleeve is provided with a movable handle for controlling the locking or unlocking of the locking device. The novel casing telescopic locking device of the present invention can realize the adjustment and locking of the telescopic rod at any point within the maximum telescopic range, and is convenient to operate and reliable in locking, durable, long in service life, simple and beautiful in appearance, and the movable handle can be 360° ° Rotation to avoid fatigue caused by long-term directional hand holding the handle.

Description

A New Type of Sleeve Telescopic Locking Device

technical field

The invention relates to the technical field of telescopic rod manufacture, in particular to a novel casing telescopic locking device.

Background technique

Telescopic rods are widely used in various products or appliances, such as telescopic crutches, telescopic umbrella handles, telescopic mop handles, telescopic suitcase pull rods, hospital infusion room hanging rods, etc. , but these telescopic rods are adjustable in stages (specifically, there are fixed clamping and fixed gears), and it is impossible to adjust and lock the position of any extension distance or retraction distance (in layman's terms, it cannot be arbitrarily Realize that the telescopic rod can be adjusted at any length within the scope of the maximum elongation and locked and fixed), this has always been a technical bottleneck in the technical field of telescopic rods.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a novel casing telescopic locking device.

In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problem is: a new telescopic locking device for sleeves, including an outer sleeve and an inner sleeve, the inner sleeve is slidably socketed in the outer sleeve, and the inner sleeve One end is provided with a locking device for fastening the inner sleeve at any position in the outer sleeve, and the other end of the inner sleeve is provided with a movable handle for controlling the locking or unlocking of the locking device.

The present invention further provides a novel casing telescopic locking device, the locking device of which includes an expansion sleeve fixedly connected to one end of the inner casing, a push-pull rod is slidably sleeved in the central through hole of the expansion sleeve, and one end of the push-pull rod is fixed It is connected with a supporting body whose largest dimension in the circumferential direction is larger than the diameter of the central through hole, and is used for expanding the expansion sleeve and the inner wall of the outer sleeve, and the other end of the push-pull rod is connected with the movable handle through transmission.

The present invention further provides a novel casing telescopic locking device, the push-pull rod is a hollow rod body, the support body is fixedly socketed in a port of the hollow rod body, and the support body is a spherical or conical support body, A through channel is opened in the support body, an external thread connecting pipe is fixedly sleeved in the other port of the hollow rod body, and an internal thread sleeve is arranged in the port of the other end of the inner sleeve, and the internal thread sleeve and the inner sleeve Solid as a whole, the externally threaded connecting pipe is sleeved in the internally threaded sleeve and threadedly connected with it.

The invention further provides a novel sleeve telescopic locking device, the movable handle of which includes a handle and a knob, the outer wall of the knob is slidably fitted or separated from the inner wall of the outer sleeve, and one end of the knob is connected to the external thread through the threaded through hole. After the connecting pipe is screwed and fixedly connected with fastening pins, the inside of the knob is provided with a cavity, and the handle is fastened to the other end of the knob.

The present invention further provides a new casing telescopic locking device, the bottom end of the outer casing is fixedly connected with a casing telescopic restriction rod or a casing telescopic restriction rope, and the casing telescopic restriction rod or casing telescopic restriction rope passes through the support body The through-passage is located in the hollow rod body, and the end of the casing telescopic limiting rod or the casing telescopic restricting rope located in the hollow rod body is fixedly connected with a stopper whose circumferential dimension is larger than the diameter of the through-passage of the support body.

The present invention further provides a novel casing telescopic locking device, the block of which is a nut.

Beneficial effects of the present invention: the novel casing telescopic locking device of the present invention can realize adjustment and locking of telescopic rods at any point within the maximum telescopic range, and is easy to operate and reliable in locking, durable, long in service life, and simple in appearance Beautiful, the movable handle can be rotated 360° to avoid fatigue caused by holding the handle for a long time.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the present invention;

Fig. 2 is a schematic diagram of the structure of A-A in Fig. 1;

Fig. 3 is a schematic diagram of the structure of the present invention in a stretched state.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

Embodiment 1, a novel casing telescopic locking device, including an outer casing 1 and an inner casing 2, the inner casing 2 is slidably socketed in the outer casing 1, and one end of the inner casing 2 is provided with a device to make the inner casing 2 The locking device fastened at any position in the outer sleeve 1, the other end of the inner sleeve 2 is provided with a movable handle to control the locking or unlocking of the locking device; the locking device includes a fixed connection to the inner sleeve The expansion sleeve 3 at one end of the tube 2, the push-pull rod 5 is slidably sleeved in the central through hole 4 of the expansion sleeve 3, and one end of the push-pull rod 5 is fixedly connected with a ring with the largest circumferential dimension larger than the diameter of the central through hole 4 for making the expansion The sleeve 3 and the support body 6 that is stretched on the inner wall of the outer sleeve 1, and the other end of the push-pull rod 5 is connected to the movable handle; the push-pull rod 5 is a hollow rod body, and the support body 6 is fixedly sleeved on the hollow rod body. In one port, the support body 6 is a spherical or conical support body, and a through passage 7 is opened in the support body 6, and an externally threaded connecting pipe 8 is fixedly sleeved in the other port of the hollow rod body. The port at the other end of the casing 2 is provided with an internally threaded sleeve 9, the internally threaded sleeve 9 is integrated with the internal sleeve 2, and the externally threaded connecting pipe 8 is sleeved in the internally threaded sleeve 9 and is threadedly connected thereto; The movable handle includes a handle 10 and a knob 11, the outer wall of the knob 11 is slidably attached to or separated from the inner wall of the outer sleeve 1, and one end of the knob 11 is screwed to the externally threaded connecting pipe 8 through a threaded through hole and tightened. The fixed pin 19 is fixedly connected, and the interior of the knob 11 is provided with an accommodation cavity 12 , and the handle 10 is tightly connected to the other end of the knob 11 .

The bottom end of the outer casing 1 is fixedly connected (preferably fixedly connected with a stud bolt 17) with a sleeve telescopic restriction rod 13, and the sleeve telescopic restriction rod 13 passes through the through channel 7 of the support body 6 and is located in the hollow rod body. And the end of the telescoping restricting rod 13 located in the hollow rod body is fixedly connected with a nut 14 whose circumferential dimension is larger than the diameter of the through channel 7 of the support body 6 .

The outer casing 1 and the inner casing 2 are both pipe bodies with a circular cross section.

Preferably, a rubber layer 18 is provided on the outer wall of the deformed expansion part of the expansion sleeve 3, and the rubber layer 18 is used to increase the coefficient of friction between the expansion sleeve and the inner wall of the outer sleeve 1, so that the locking device is more reliable.

Embodiment 2. The difference between this embodiment and Embodiment 1 is that the bottom end of the outer sleeve 1 is fixedly connected with a sleeve telescopic restriction rope, and the through channel 7 through which the sleeve telescopic restriction rope passes through the support body 6 is located at In the hollow rod body, the end of the telescoping restricting rope of the casing located in the hollow rod body is fixedly connected with a block whose circumferential dimension is larger than the diameter of the through channel 7 of the support body 6 .

The outer casing 1 and the inner casing 2 are both oval and polygonal in section.

Embodiment 3. The difference between this embodiment and Embodiment 2 is that the outer casing 1 and the inner casing 2 are both pipe bodies with an elliptical cross-section.

Embodiment 4. The difference between this embodiment and Embodiment 3 is that the outer sleeve 1 and the inner sleeve 2 are both tube bodies with a polygonal cross section.

Embodiment 5. The difference between this embodiment and Embodiment 1 is that at least one chute 15 is provided on the tube wall of the outer casing 1 along its length direction, and the expansion sleeve 3 is provided with the chute 15. 15 sliders or pins 16 for sliding connection.

Embodiment 6, the difference between this embodiment and Embodiment 1 is that one end of the push-pull rod passes through the through channel 7 of the support body 6 (not shown in the figure), and is located at the two crossings of the through channel 7 of the support body 6 The body of the push-pull rod is provided with a fixed block (not shown in the figure, the block is used to limit the axial sliding of the push-pull rod in the through passage 7, but not to limit the rotation of the push-pull rod in the through-passage 7, this embodiment The middle support body 6 does not rotate with the push-pull rod, but is only affected by the axial pull and thrust of the push-pull rod), and the other end of the push-pull rod is fixedly connected with the external thread connecting pipe.

Embodiment 7. The difference between this embodiment and Embodiment 1 is that the support body 6 is rotatably socketed in the nozzle at one end of the push-pull rod 5, and is axially limited and fixed (not axially slidable). In this embodiment, the support The body 6 does not rotate with the push-pull rod 5, but is only affected by the axial pull and thrust of the push-pull rod 5.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A new casing telescopic locking device, including an outer casing and an inner casing, and the inner casing is slidably socketed in the outer casing. The locking device at any position, the other end of the inner sleeve is provided with a movable handle for controlling the locking or unlocking of the locking device. 2. The novel casing telescopic locking device according to claim 1, characterized in that, the locking device includes an expansion sleeve fixedly connected to one end of the inner sleeve, and the central through hole of the expansion sleeve is slidingly sleeved with a A push-pull rod, and one end of the push-pull rod is fixedly connected with a supporting body whose circumferential maximum size is larger than the diameter of the central through hole, and is used for expanding the expansion sleeve and the inner wall of the outer sleeve, and the other end of the push-pull rod is connected to the movable handle through transmission. 3. The novel casing telescopic locking device according to claim 2, wherein the push-pull rod is a hollow rod body, and the support body is fixedly sleeved in a port of the hollow rod body, and the support body The body is a spherical or tapered support body, and a through passage is opened in the support body. The other port of the hollow rod body is fixedly sleeved with an externally threaded connecting pipe, and the port at the other end of the inner sleeve is provided with an internal thread. The inner threaded sleeve is integrated with the inner casing, and the outer threaded connecting pipe is sleeved in the inner threaded sleeve and threadedly connected with it. 4. The novel casing telescopic locking device according to claim 1, characterized in that, the movable handle includes a handle and a knob, the outer wall of the knob slides and fits or separates from the inner wall of the outer sleeve, and the knob One end of the knob is screwed to the externally threaded connecting pipe through a threaded through hole and fixedly connected with a fastening pin. There is a cavity inside the knob, and the handle is fastened to the other end of the knob. 5. The novel casing telescopic locking device according to any one of claims 1-4, characterized in that, the bottom end of the outer casing is fixedly connected with a casing telescopic limiting rod or a casing telescopic limiting rope, the The through channel through which the casing telescopic limiting rod or the casing telescopic limiting rope passes through the support body is located in the hollow rod body, and the end of the casing telescopic limiting rod or the casing telescopic limiting rope located in the hollow rod body is fixedly connected with a circumferential dimension A stop that is larger than the diameter of the through passage of the support body. 6. The novel sleeve telescopic locking device according to claim 5, wherein the stopper is a nut.