WO2021004271A1

WO2021004271A1 - Locking structure of telescopic rod member

Info

Publication number: WO2021004271A1
Application number: PCT/CN2020/097789
Authority: WO
Inventors: 张巨鸿
Original assignee: 嘉兴捷顺旅游制品有限公司
Priority date: 2019-07-10
Filing date: 2020-06-23
Publication date: 2021-01-14
Also published as: CN211093838U

Abstract

Disclosed is a locking structure of a telescopic rod member, the locking structure being used between an inner rod (1) and an outer rod (2) that are axially telescopic, wherein the outer rod (2) and the inner rod (1) are arranged in a mutually embedded manner. The locking structure comprises: a shaft sleeve (3) provided with a through hole (37), with the end portion of the side, connected to the inner rod (1), of the outer rod (2) being fixed in the through hole (37), the side wall of the shaft sleeve (3) being provided with a shaft hole (33) in communication with the through hole (37), and the shaft hole (33) facing the inner rod (1); and a spanner (4) rotationally connected to the shaft sleeve (3) at the shaft hole (33) and provided with a pressing block (43) accommodated in the shaft hole (33) and facing the inner rod (1). When the spanner (4) rotates in the circumferential direction along the shaft hole (33), the pressing block (43) presses on or is away from the inner rod (1); and the pressing block (43) presses on the inner rod (1), such that a state where the inner rod (1) and the outer rod (2) are telescopic can achieve locking, and the pressing block (43) is away from the inner rod (1), such that the state where the inner rod (1) and the outer rod (2) are telescopic can achieve unlocking. The structure is simple, and the application of force is balanced during locking and unlocking.

Description

Locking structure of telescopic rod

Technical field

The utility model relates to the field of household cleaning appliances, in particular to a locking structure of a telescopic rod.

Background technique

Commonly used household cleaning tools, such as mops, cleaning brushes, window cleaners, floor sweepers, brooms, etc., are the structure of the handle connected to the cleaning body. At the same time, in order to adapt the cleaning tools to a wider range of cleaning places, the handle is designed as Variable length form.

technical problem

For example, in the Chinese patent with the publication number CN105919524A titled "A Spin Dehydration Mop", the disclosed structure for adjusting the length of the handle bar includes an outer tube and an inner tube, and the outer tube and the inner tube are sleeved. The lock sleeve is fixedly connected with the outer tube, and the lock sleeve is provided with a locking mechanism that can lock the relative displacement of the outer tube and the inner tube. The locking mechanism includes a trigger, the trigger is hinged with the lock sleeve, the trigger is provided with a compression block, and the lock sleeve is provided with a hole for the compression block to penetrate; when the trigger is pushed, the compression block abuts the inner tube through the hole, This completes the relative fixation between the outer tube and the inner tube. In this form of hinged pulling, the pulling force is uneven, and the hinged shaft is easily damaged.

Technical solutions

The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art, and provide a locking structure of the telescopic rod, so that the locking and unlocking forces of the telescopic rod are balanced, and the service life of the locking structure is prolonged.

The technical solution adopted by the present utility model to solve the above-mentioned problems is to provide a locking structure of a telescopic rod, which is used between an axially expandable inner rod and an outer rod, and the outer rod and the inner rod are sleeved with each other;

The shaft sleeve is provided with a through hole; the end of the outer rod connected to the inner rod is fixed in the through hole; the side wall of the shaft sleeve is provided with a shaft hole communicating with the through hole, and the shaft hole faces the Inner rod

A wrench, which is rotatably connected with the shaft sleeve at the shaft hole, and is formed with a pressing block received in the shaft hole and facing the inner rod;

When the wrench rotates in the circumferential direction of the shaft hole, the pressure block presses or moves away from the inner rod; the pressure block presses the inner rod so that the telescopic state between the inner rod and the outer rod is locked, the The pressing block is far away from the inner rod so that the telescopic state between the inner rod and the outer rod is unlocked.

Further, the through hole includes a large-diameter section and a small-diameter section, the large-diameter section matches the outer diameter of the outer rod, and the small-diameter section matches the outer diameter of the inner rod; the small-diameter section The inner diameter is smaller than the outer diameter of the outer rod.

Further, the pressure block and the sleeve are circumferentially defined, and the pressure block is formed with a pressure surface facing the inner rod and matching the outer surface of the inner rod.

Further, the sleeve is formed with a locking groove, and the pressing block is formed with a protrusion in the circumferential direction; the protrusion extends into the locking groove and is restricted by the locking groove.

Further, the wrench is threadedly connected with the shaft sleeve; when the wrench and the shaft sleeve rotate with the threads, the pressure block is away from or presses the inner rod.

Further, the wrench is provided with a push block, and the push block abuts against the pressure block; the pressure block forms an inclined surface toward the push block; the inclined surface is a curved surface or a flat surface; when the wrench rotates, the push block The conflicting part with the pressure block gradually changes with the inclined surface, and the pressure block presses or moves away from the inner rod.

Further, a circumferential limit structure is provided between the shaft sleeve and the wrench to limit the relative rotation between the wrench and the shaft sleeve.

Further, the relative rotation angle between the wrench and the sleeve is ≤90°.

Further, the sleeve is formed with an open neck screwed to the wrench; the circumferential limiting structure includes limiting ribs provided on the outer wall and/or inner wall of the open neck, and limiting ribs provided on the wrench Block; the limit block rotates with the wrench to abut the limit rib, and the wrench completes the rotation.

Beneficial effect

The locking structure of the telescopic rod provided by the utility model locks or unlocks the expansion and contraction of the rod through the rotation of the wrench, and the structure is simple; and the circumferential rotation of the wrench relative to the shaft hole makes the unlocking or locking force balanced.

Description of the drawings

The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings:

Figure 1 is an exploded schematic diagram of the locking structure of the telescopic rod of the present invention;

Figure 2 is a schematic diagram of the wrench in the direction A in Figure 1;

Figure 3 is a sectional view of the locking structure of the telescopic rod of the present invention when the inner rod and the outer rod are locked;

Description of drawing number:

1-inner rod; 2-outer rod; 3-shaft sleeve, 31-large diameter section, 32-small diameter section, 33-shaft hole, 34-slot, 35,36-limiting rib, 37-through hole; 4 -Wrench, 41- pressure surface, 42- push block, 43- pressure block, 43a- protrusion, 44- limit block.

The best mode of the invention

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further describes the present utility model in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not used to limit the present utility model.

As shown in Figures 1-3, the locking structure of the telescopic rod of the present invention is used between the inner rod 1 and the outer rod 2 that are axially extendable. Among them, the outer rod 2 and the inner rod 1 are sleeved with each other. The locking structure of the telescopic rod includes a shaft sleeve 3 and a wrench 4. The sleeve 3 is provided with a through hole 37. The end of the outer rod 2 connected to the inner rod 1 is fixed in the through hole 37. The shaft sleeve 3 is fixed to the outer rod 2. The side wall of the sleeve 3 is provided with a shaft hole 33 communicating with the through hole 37. The shaft hole 33 faces the inner rod 1. Preferably, in this embodiment, the axis of the shaft hole 33 is perpendicular to the axis of the inner rod 1. The wrench 4 is rotatably connected with the shaft sleeve 3 at the shaft hole 33, and a pressing block 43 extending into the shaft hole 33 and facing the inner rod 1 is formed.

When the wrench 4 rotates in the circumferential direction of the shaft hole 33, the pressing block 43 presses or moves away from the inner rod 1. The pressing block 43 presses the inner rod 1 so that the telescopic state between the inner rod 1 and the outer rod 2 is locked. On the contrary, the pressing block 43 is far away from the inner rod 1 so that the telescopic state between the inner rod 1 and the outer rod 2 is unlocked, and thus, the inner rod 1 and the outer rod 2 can be telescoped with each other. The "distance" mentioned here refers to the "compression" state. When the pressure block 43 no longer generates a squeezing force on the inner rod 1, the retractable state between the inner rod 1 and the outer rod 2 is unlocked. .

When the utility model is used for household cleaning tools, the retractable state between the inner rod 1 and the outer rod 2 is locked during cleaning work or storage, so that the total length of the inner rod 1 and the outer rod 2 is fixed; at the same time, it can be unlocked The retractable state between the inner rod 1 and the appearance 2 allows the distance between the inner rod 1 and the outer rod 2 to be adjusted according to the use occasion of the household cleaning tool, or the height and needs of the user.

The utility model can be completed by the cooperation of the shaft sleeve 3 and the wrench 4, and has a simple structure. The running track of the wrench 4 is to rotate in the circumferential direction of the shaft hole 33, so that when the wrench 4 is pulled, the force is balanced, and the use comfort is also improved.

The shaft sleeve 3 and the outer rod 2 can be in various fixing forms commonly used by those skilled in the art, such as screw connection, fastener fixing, pin connection, expansion connection, etc. Preferably, in this embodiment, the through hole 37 includes a large diameter section 31 and a small diameter section 32. The large diameter section 31 matches the outer diameter of the outer rod 2, and the small diameter section 32 matches the outer diameter of the inner rod 1. The diameter of the small-diameter section 32 is smaller than the outer diameter of the outer rod 2. Thus, the outer rod 2 is limited to the large diameter section 31.

The pressing block 43 is circumferentially defined and arranged with the sleeve 3, and the pressing block 43 is formed with a pressing surface 41 facing the inner rod 1 and matching the outer surface of the inner rod 1. For example, in this embodiment, the inner rod 1 is a circular tube, and the pressing surface 41 is an arc shape matching the outer circumference of the inner rod 1. Therefore, the contact area between the pressing surface 41 and the outer surface of the inner rod 1 can be increased. When the pressing block 43 presses the inner rod 1, the force between the two is more balanced, and the force-bearing part is not easily damaged. The service life of the inner rod 1.

The pressure block 43 and the shaft sleeve 3 are arranged in a circumferential direction, which may be: the shaft sleeve 3 is formed with a clamping groove 34, and the pressure block 43 is circumferentially formed with a protrusion 43a. The protrusion 43a extends into the slot 34 and is limited by the slot 34, as shown in FIG. 1. Alternatively, the slot 34 is provided in the axial direction of the pressure block 43, and the protrusion 43a is provided in the sleeve 3. This simple deformation falls within the protection scope of the present invention.

In this embodiment, the wrench 4 and the sleeve 3 are threadedly connected. For example, the shaft sleeve 3 is provided with an external thread, the wrench 4 is provided with an internal thread matching the external thread, and the wrench 4 is screwed on the shaft sleeve 3; or, the wrench 4 is provided with an external thread, and the shaft sleeve 3 is provided with a matching external thread. Internal thread, the wrench 4 is screwed into the sleeve 3. When the wrench 4 and the shaft sleeve 3 rotate obliquely with the thread, the pressing block 43 moves away from or presses the inner rod 1. The form of the thread serves two purposes, and it can be used as a connection structure between the wrench 4 and the sleeve 3; at the same time, the inclination of the thread itself is effectively used without the need for another structure to keep the pressure block 43 away from or press the inner rod 1.

In this embodiment, the wrench 4 has a push block 42 formed at the shaft hole 33, and the push block 42 abuts against the pressing block 43. The pressing block 43 forms a slope toward the pushing block 42. The inclined surface can be curved or inclined. Preferably, in this embodiment, the pressure block 43 forms a groove facing the push block 42, and the side walls of the groove are symmetrical inclined surfaces. The pressing block 43 and the pushing block 42 are arranged separately, and the processing of each part is simpler, which is suitable for actual mass production. When the wrench 4 rotates, the contact portion between the push block 42 and the pressure block 43 gradually changes with the inclined surface. Thus, the push block 42 presses against the push block 43 to press the inner rod 1; or, the push block 42 relaxes the pressing force against the pressure block 43, and the pressing force of the press block 43 on the inner rod 1 decreases accordingly.

A circumferential limit structure is provided between the shaft sleeve 3 and the wrench 4 to limit the relative rotation between the wrench 4 and the shaft sleeve 3.

Preferably, the relative rotation angle between the wrench 4 and the shaft sleeve 3 is ≤90°. Therefore, excessive rotation of the wrench 4 is prevented, and the service life of the locking structure is prolonged.

The shaft sleeve 3 is formed with an open neck that is screwed to the wrench 4 at the shaft hole 33. The circumferential limiting structure includes limiting ribs arranged on the outer wall and/or inner wall of the opening neck, and limiting blocks 44 arranged on the wrench. The limit block 44 rotates with the wrench 4 to abut the limit rib, and the wrench 4 completes the rotation.

In this embodiment, the limiting rib 36 is provided on the inner wall of the opening neck, and the wrench 4 is provided with a limiting block 44 matching the second limiting rib 36. At the maximum rotation angle of the wrench 4 and the sleeve 3, The limiting rib 36 and the limiting block 44 abut against each other, so that the wrench 4 cannot rotate further relative to the sleeve 3, and the position is limited.

Further, in this embodiment, the outer wall of the open neck is provided with an external thread that matches the screw connection of the wrench 4, and the external thread is provided with a limiting rib 35. Therefore, when the threaded end of the wrench 4 (that is, the limit block on the outer wall side of the open neck) of the wrench 4 is correspondingly rotated to the limit rib 35, it is abutted, so that the wrench 4 cannot rotate further relative to the sleeve 3, and obtain Limit. By providing two limiting ribs (35, 36) on both the inner and outer walls, the wrench 4 is limited in both rotation directions, that is, it receives the rotation limit when it is locked and unlocked, thereby further preventing the wrench 4 from being locked. Excessive rotation. Of course, the limit in the two directions can also be realized by setting both the limit ribs on the inside of the opening neck or both the limit ribs on the outside of the opening neck. These simple deformations are Within the protection scope of the utility model.

The above content described in this specification is only an example of the present utility model. Those skilled in the technical field of the present utility model can make various modifications or additions to the specific embodiments described or substitute similar methods, as long as they do not deviate from the content of the utility model specification or exceed the definition of the claims The scope of protection should belong to the protection scope of this utility model.

Claims

A locking structure for a telescopic rod, used between an axially telescopic inner rod and an outer rod, the outer rod and the inner rod are sleeved with each other; and the feature is that it includes a shaft sleeve provided with a through hole; and The end of the outer rod on the connecting side of the inner rod is fixed in the through hole; the side wall of the sleeve is provided with a shaft hole communicating with the through hole, and the shaft hole faces the inner rod; A wrench is rotatably connected to the shaft sleeve at the shaft hole, and a pressure block is formed in the shaft hole and faces the inner rod; when the wrench rotates in the circumferential direction of the shaft hole, the pressure block presses or moves away The inner rod; the pressure block compresses the inner rod so that the telescopic state between the inner rod and the outer rod is locked, and the pressure block is away from the inner rod so that the inner rod and the outer rod The retractable state of is unlocked.
The locking structure of the telescopic rod according to claim 1, wherein the through hole includes a large diameter section and a small diameter section, the large diameter section matches the outer diameter of the outer rod, and the small diameter section Match with the outer diameter of the inner rod; the inner diameter of the small diameter section is smaller than the outer diameter of the outer rod.
The locking structure of the telescopic rod according to claim 1, wherein the pressure block and the sleeve are circumferentially defined and arranged, and the pressure block is formed with a pressure surface facing the inner rod and matching the outer surface of the inner rod .
The locking structure of the telescopic rod according to claim 3, wherein the sleeve is formed with a slot, and the pressure block is formed with a protrusion in the circumferential direction; the protrusion extends into the slot and Defined by the card slot.
The locking structure of the telescopic rod according to claim 1, wherein the wrench is threadedly connected to the shaft sleeve; when the wrench and the shaft sleeve rotate with the threads, the pressure block is far away or pressed The inner rod.
The locking structure of the telescopic rod according to any one of claims 1 to 5, wherein the wrench is provided with a push block, the push block abuts against the pressure block; the pressure block faces the push block An inclined surface is formed; the inclined surface is a curved surface or a flat surface; when the wrench is rotated, the contact portion between the push block and the pressure block gradually changes with the inclined surface, and the pressure block presses or moves away from the inner rod.
The locking structure of the telescopic rod according to claim 6, wherein a circumferential limit structure is provided between the shaft sleeve and the wrench to limit the gap between the wrench and the shaft sleeve. Relative rotation.
The locking structure of the telescopic rod according to claim 7, wherein the relative rotation angle between the wrench and the shaft sleeve is ≤90°.
The locking structure of the telescopic rod according to claim 7, wherein the sleeve is formed with an open neck that is screwed to the wrench; the circumferential limiting structure includes an outer wall of the open neck and/ Or a limit rib provided on the inner wall, and a limit block provided on the wrench; the limit block rotates with the wrench to abut the limit rib, and the wrench completes the rotation.