Stepless regulation telescopic rod

Abstract

According to the stepless adjustment telescopic rod, the sliding body can be rotationally arranged on the second telescopic piece and can also be arranged on the first telescopic piece in a sliding mode, and the interference top bead is located in the penetrating hole of the sliding body and the spiral groove of the second telescopic piece; the sliding body can move in the length direction of the first telescopic piece and can also rotate on the second telescopic piece, so that the sliding body moves relative to the second telescopic piece in the spiral direction, the interference top bead is pushed to move in the corresponding spiral groove, and the interference top bead moves between a high position and a low position; according to the locking mechanism, the interference top bead abuts against the first telescopic piece and is separated from or not interfered with the first telescopic piece, that is, locking and unlocking of the locking mechanism are achieved, the structure is simple, assembling is convenient, and operation is easy.

Description

TECHNICAL FIELD

[0001] The present application relates to a stepless adjustment telescopic rod. BACKGROUND

[0002] In daily life, telescopic rods are widely used in various fields, such as mop rods, tripods, trekking poles, walking sticks, table legs, bed legs, etc. Telescopic rods are generally two or more rod-shaped members slidingly connected together, and each adjacent two rod-shaped members are locked by a locking structure to achieve length adjustment.

[0003] The common telescopic rod on the market is locked by screwing the end portions of adjacent rod-shaped members through a spiral sleeve, which is not convenient to adjust.

[0004] There are also some telescopic rods on the market that are mainly locked by elastic members, mainly relying on the quality stability of the elastic members. For example, a Chinese patent with publication number CN2104111301U discloses a convenient telescopic rod. The stepless adjustment telescopic rod sets a locking mechanism between two adjacent sub-pipes. The locking mechanism generates a force between the steel ball and the inner wall of the large pipe through the force of the return spring and the force generated by the inclined surface on the steel sleeve, thereby achieving the function of locking the two pipe sections. The locking mechanism mainly relies on the elastic force of the return spring for locking, and the structure is complex and inconvenient to assemble. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a stepless adjustment telescopic rod that is convenient to operate.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: a stepless adjusting telescopic rod, comprising a first telescopic part and a second telescopic part which are inserted and telescopically matched, a locking mechanism for locking between the first telescopic part and the second telescopic part, the locking mechanism comprising at least one interference top bead, a sliding body rotatably arranged on the second telescopic part, at least one spiral groove being formed on one of the two sliding bodies at one end of the second telescopic part, at least one penetrating hole being formed on the other of the two sliding bodies, each of the interference top beads being located in the corresponding penetrating hole and spiral groove, the bottom of each of the spiral grooves gradually changing from one side to the other side, so that the interference top bead has a relatively convex high position to resist the wall of the first telescopic part and a relatively sunken low position to be separated from the wall of the first telescopic part, the sliding body being slidably arranged on the first telescopic part along the length direction, and the sliding body moving the interference top bead between the high position and the low position when the first telescopic part and the second telescopic part are relatively rotated.

[0007] In some embodiments, the locking mechanism comprises a group of locking units formed on one end of the second telescopic part, the locking unit comprising one of the sliding bodies, a plurality of spiral grooves with the same spiral direction being formed on one of the two sliding bodies at one end of the second telescopic part, a plurality of penetrating holes being formed on the other of the two sliding bodies, and a plurality of interference top beads being respectively inserted into the corresponding penetrating holes and spiral grooves.

[0008] In some embodiments, the locking mechanism comprises two groups of locking units distributed along the length direction at one end of the second telescopic part, each of the locking units comprising one of the sliding bodies, the sliding body being a sliding ring, a plurality of penetrating holes being formed on the sliding body in the circumferential direction, and a plurality of spiral grooves with the same spiral direction being formed on one end of the second telescopic part, a plurality of interference top beads being respectively inserted into the corresponding penetrating holes and spiral grooves, wherein the spiral directions of the spiral grooves of the two groups of locking units are opposite, so that the interference top beads of the two groups of locking units are located at the high position, and the two sliding bodies are relatively far away or relatively close to each other.

[0009] In some embodiments, two sets of the locking units are symmetrically arranged on one end of the second telescopic member.

[0010] In some embodiments, an auxiliary elastic member is arranged between the sliding body and the second telescopic member, which helps the sliding body to push the interference top bead to the high position.

[0011] In some embodiments, the first telescopic member is a sleeve, the second telescopic member is slidingly inserted into the first telescopic member, and the sliding body is slidingly fitted with the inner wall of the first telescopic member through at least one track.

[0012] In some embodiments, the second telescopic member includes a second telescopic member body and a locking end fixed to one end of the second telescopic member body, the spiral groove is arranged on the locking end, and the sliding body is rotatably arranged on the locking end.

[0013] In some embodiments, a gripping end sleeve with increased friction is fixed on the first telescopic member to facilitate the rotation of the second telescopic member relative to the first telescopic member.

[0014] In some embodiments, the interference top bead is a steel bead.

[0015] In some embodiments, the stepless adjustment telescopic rod includes a plurality of telescopic members including the first telescopic member and the second telescopic member, and each adjacent two telescopic members are slidingly fitted and locked by the corresponding locking mechanism.

[0016] The scope of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features. For example, the above features are replaced with each other to form technical solutions with similar functions disclosed in the present application (but not limited to).

[0017] Due to the use of the above technical solutions, the present application has the following advantages compared with the prior art: the present application provides a stepless adjustment telescopic rod, the sliding body can be rotatably arranged on the second telescopic member and slidingly arranged on the first telescopic member, and the interference top bead is located in the penetrating hole of the sliding body and the spiral groove of the second telescopic member. When the first telescopic member and the second telescopic member are relatively rotated, because the sliding body needs to move along the length direction of the first telescopic member and rotate on the second telescopic member, the sliding body moves along the spiral direction relative to the second telescopic member, thereby pushing the interference top bead to move in the corresponding spiral groove, so that the interference top bead moves between the high position and the low position, realizes the interference of the interference top bead with the first telescopic member, and the disengagement or non-interference, i.e. the locking and unlocking of the locking mechanism, the structure is simple, the assembly is convenient and the operation is simple. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Exponential diagram of telescopic rod structure with stepless adjustment Figure 2 Exponential diagram of telescopic rod structure with stepless adjustment in locked state (embodiment one) Figure 3 Exponential diagram of telescopic rod structure with stepless adjustment in unlocked state (embodiment one) Figure 4 Exponential diagram of telescopic rod structure with stepless adjustment in locked state (embodiment two) Figure 5 Exponential diagram of telescopic rod structure with stepless adjustment in unlocked state (embodiment two) Figure 6 Exponential diagram of telescopic rod structure with stepless adjustment in locked state (embodiment three) Figure 7 Exponential diagram of telescopic rod structure with stepless adjustment in unlocked state (embodiment three) Figure 8 Exponential diagram of telescopic rod structure with stepless adjustment Figure 9 Exponential diagram of telescopic rod structure with stepless adjustment Figure 8 A-A cross-sectional view (interference top bead in high position) Figure 10 Exponential diagram of telescopic rod structure with stepless adjustment Figure 8 A-A cross-sectional view (interference top bead in low position) Figure 11 Exponential diagram of telescopic rod structure with stepless adjustment Wherein: 1, first telescopic member; 11, holding end sleeve; 2, second telescopic member; 21, second telescopic member body; 22, helical groove; 23, locking end; 3, sliding body; 31, through hole; 4, interference top bead; 5, auxiliary elastic member. DETAILED DESCRIPTION

[0019] A telescopic rod with stepless adjustment is applied to various fields, such as mop rod, tripod, trekking pole, walking stick, table leg, bed leg, etc. The telescopic rod comprises multiple telescopic members, each adjacent two telescopic members being slidingly inserted and locked by a locking mechanism, or at least comprising a first telescopic member 1 and a second telescopic member 2 which are inserted and telescopically matched, and a locking mechanism for locking the first telescopic member 1 and the second telescopic member 2.

[0020] As shown in the drawings, the locking mechanism comprises an interference top bead 4 and a sliding body 3, the sliding body 3 being a sliding sleeve ring, being rotationally arranged on the second telescopic member and slidingly arranged on the first telescopic member, the second telescopic member 2 having a helical groove 22 which is helically extended or obliquely arranged along the length direction of the second telescopic member 2, the sliding body 3 having a through hole 31, and the interference top bead being located in the through hole of the sliding body and the helical groove of the second telescopic member.

[0021] The bottom of each spiral groove 22 gradually deepens from one side to the other, so that the interference top bead 4 has a relatively convex high position to abut against the wall of the first telescopic member 1 and a relatively sunken low position to be separated from the wall of the first telescopic member 1.

[0022] When the first telescopic member and the second telescopic member are relatively rotated, because the sliding body can move along the length direction of the first telescopic member and rotate on the second telescopic member, the sliding body moves on the second telescopic member in the spiral direction, thereby pushing the interference top bead to move in the corresponding spiral groove, so that the interference top bead moves between the high position and the low position, and the interference of the interference top bead with the first telescopic member is achieved.

[0023] To illustrate the scheme, the application is described in detail below with reference to the drawings and in combination with three embodiments. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict, and "up" and "down" in the application are based on the drawings.

[0024] Embodiment one: the embodiment provides a stepless adjustment telescopic rod, which comprises a first telescopic member 1 and a second telescopic member 2 that are inserted and telescopically matched, and a locking mechanism for locking the first telescopic member 1 and the second telescopic member 2.

[0025] In the embodiment, the first telescopic member 1 is a sleeve, the second telescopic member 2 is slidably inserted into the first telescopic member 1, the sliding body 3 is a sliding sleeve ring, which is sleeved on the second telescopic member 2, and the sliding body 3 is slidably matched with the inner wall of the first telescopic member 1 through three tracks.

[0026] As shown in Figure 2 , 3 In the embodiment, the locking mechanism comprises a group of locking units formed on one end of the second telescopic member 2, the locking units comprise a sliding body 3 that is rotatably arranged on the second telescopic member 2 and slidably arranged on the first telescopic member 1, in order to consider the stability in the circumferential direction, the interference top bead 4 is preferably more than two, and in the embodiment, the interference top bead 4 is three, the interference top bead 4 is a steel ball, which is distributed in the circumferential direction of the sliding body 3, correspondingly, three spiral grooves 22 are formed on the locking end 23 of one end of the second telescopic member 2, the three spiral grooves 22 are distributed in the same circumferential direction of the locking end 23, the spiral directions of the three spiral grooves 22 are consistent, correspondingly, the sliding body 3 is provided with three penetrating holes 31, and each interference top bead is located in the corresponding penetrating hole of the sliding body 3 and the corresponding spiral groove.

[0027] The bottom of each spiral groove 22 gradually deepens from one side to the other, as shown in Figures 1-3As shown in Figures 8-10, the interference bead 4 has a relatively protruding high position that abuts against the wall of the first telescopic member 1, and a relatively recessed low position that disengages from the wall of the first telescopic member 1. When the first telescopic member 1 and the second telescopic member 2 rotate relative to each other, the interference bead 4 is moved between the high and low positions by the sliding body 3. In this embodiment, the interference bead 4 is in the low position on the upper side of the bottom of the three spiral grooves, which is deeper, and in the high position on the lower side, which is shallower.

[0028] As attached Figure 2 As shown, the first telescopic component 1 is not illustrated. When the steel ball is in the high position, the sliding body 3 is located on the lower side of the spiral groove, and the steel ball abuts against the inner wall of the first telescopic component 1. When an external force presses the second telescopic component 2 upward into the first telescopic component 1, the steel ball and the first telescopic component 1 interfere with each other, causing the steel ball to move towards the shallowest part of the bottom of the spiral groove 22. The more it is pressed, the more the steel ball protrudes, and the more the first telescopic component 1 is pressed, the tighter it becomes, thus completing the locking. At this time, only when the first telescopic component 1 and the second telescopic component 2 are rotated relative to each other will the sliding body 3 rotate accordingly and push the steel ball upward and downward until the steel ball disengages from the inner wall of the first telescopic component 1, thus completing the unlocking. Only then can the second telescopic component 2 be pressed upward into the first telescopic component 1.

[0029] When the first telescopic member 1 and the second telescopic member 2 are rotated relative to each other to reset, the locking between the first telescopic member 1 and the second telescopic member 2 can be restored. An auxiliary elastic member 5 is provided between the sliding body 3 and the second telescopic member 2. The auxiliary elastic member 5 helps to push the sliding body 3 to push the steel ball to a higher position during the relative rotation reset process of the first telescopic member 1 and the second telescopic member 2. In this embodiment, the auxiliary elastic member 5 is located above the sliding body 3.

[0030] When the second telescopic component 2 is pulled downwards, as shown in the attached image... Figure 3 As shown, at this time, the steel ball is driven by friction to move to a lower position in the spiral groove, and at the same time, it drives the sliding body 3 to move spirally, so that the steel ball and the first telescopic member 1 do not interfere with each other and can be pulled down freely.

[0031] The first telescopic member 1 is fixed with a gripping end sleeve 11 that increases friction and facilitates the rotation of the second telescopic member 2 relative to the first telescopic member 1.

[0032] Example 1, taking a trekking pole as an example, as shown in the attached document. Figure 11 As shown, the trekking pole consists of three or four telescopic sections. Each pair of adjacent telescopic sections forms the relationship between the first telescopic component 1 and the second telescopic component 2. (See attached diagram.) Figures 1-3, 8-10, both relative elongation is not limited, the steel ball is driven by friction in the spiral groove is moved to the low, so as not to interfere with the first telescopic part 1 between the sleeve, can be freely pulled out until the end of the extreme position, the sliding body 3 in the holding end sleeve 11 under the stop, so as not to pull out again, but when you need to press in, the steel ball and the first telescopic part 1 between the interference contact, prompting the steel ball is to the shallowest direction of the spiral groove 22 groove bottom moving trend, the more pressure steel ball, the more convex, the first telescopic part 1 and the second telescopic part 2 is pressed more tightly, can't press in, if you want to free to press in, need to turn the second telescopic part 2 relative to the first telescopic part 1, the angle of rotation is small, not more than the length of each spiral groove 22 in the direction of the rotation center circle occupies the angle, that can be unlocked, in the sliding body 3 relative to the second telescopic part 2 under the rotation of the steel ball to move up to the low, until the steel ball and the inner wall of the first telescopic part 1 is separated, complete unlocking, at this time the second telescopic part 2 can be freely pressed into the first telescopic part 1 in any position, to achieve the desired position, the second telescopic part 2 relative to the first telescopic part 1 a back to normal, can realize the total length of the infinite adjustment, realize the length of the fast adjustment, and the operation is convenient, and the locking is firm and stable.

[0033] Example two: as shown in Figures 4-5 , the difference between this embodiment and example one is that the upper side of the groove bottom of the three spiral grooves in this embodiment is shallow, the lower side is deep, the high position of the steel ball is in the upper side, and the low position is in the lower side, and the auxiliary elastic member 5 is located below the sliding body 3.

[0034] As shown in the accompanying Figure 4 , when the steel ball is in the high position, the sliding body 3 is located on the upper side of the spiral groove, and the steel ball is against the inner wall of the first telescopic part 1. When the second telescopic part 2 is pulled out of the first telescopic part 1 by external force, the steel ball and the first telescopic part 1 interfere with each other at this time, prompting the steel ball to move to the shallowest direction of the spiral groove 22 groove bottom, the more the steel ball is pulled out, the more convex, the first telescopic part 1 is pulled out more tightly, and the locking is completed. At this time, only the first telescopic part 1 and the second telescopic part 2 are rotated, the sliding body 3 is rotated and the steel ball is pushed down to the low position at the same time, until the steel ball and the inner wall of the first telescopic part 1 are separated, and the unlocking is completed, so that the second telescopic part 2 can be pulled out of the first telescopic part 1.

[0035] When the second telescopic part 2 is pressed in, as shown in the accompanying Figure 5 , at this time the steel ball is driven by friction in the spiral groove to move down to the low, at the same time drive the sliding body 3 to spiral move, so that the steel ball and the first telescopic part 1 between the interference, can be freely pressed into the first telescopic part 1.

[0036] The sliding body 3 in the above embodiments 1-2 is a sliding sleeve, which can be rotatably arranged on the second telescopic member and slidably arranged on the first telescopic member. In addition, other modes can also be adopted, such as the locking end head 23 with the helical groove 22 being used as the sliding body, i.e., being in sliding cooperation with the inner wall of the first telescopic member and being rotatably arranged on the second telescopic member, and the sliding sleeve with the penetrating hole being fixed on one end of the second telescopic member to become a part of the second telescopic member, which can also be realized.

[0037] Embodiment three: as shown in the figure, the difference between this embodiment and embodiments one and two is that the locking mechanism in this embodiment has two sets of locking units, which are formed on the locking end head 23 and distributed up and down along the length direction. Figures 6-7

[0038] Each set of locking units includes a sliding body 3, which is circumferentially provided with three penetrating holes 31. Correspondingly, the upper end of the second telescopic member 2 is provided with three helical grooves 22 with the same helical direction, and three steel balls are respectively inserted into the corresponding penetrating holes 31 and helical grooves 22.

[0039] Among them, the helical directions of the helical grooves 22 of the two sets of locking units are opposite, so that when the steel balls of the two sets of locking units are all in the high position, the two sliding bodies 3 are relatively close or relatively far away.

[0040] In this embodiment, the two sets of locking units are symmetrically arranged on the upper end of the second telescopic member 2, as shown in the figure, when the two sets of steel balls are all in the high position, the two sliding bodies 3 are relatively close, as shown in the figure, when the two sets of steel balls are all in the low position, the two sliding bodies 3 are relatively far away. Figure 6 Figure 7

[0041] The auxiliary elastic members 5 are two, which are respectively located above the upper sliding body 3 and below the lower sliding body 3.

[0042] No matter when the second telescopic member 2 is pulled outwards or compressed inwards relative to the first telescopic member 1, the steel balls on one set of locking units interfere with and abut against the first telescopic member 1, so that any position upwards or downwards is locked. Only when the first telescopic member 1 is rotated relative to the second telescopic member 2, the two sliding bodies 3 are rotated and the corresponding steel balls are pushed to move to the low position at the same time, until all the steel balls are separated from the inner wall of the first telescopic member 1, the unlocking is completed, and then the second telescopic member 2 can be pulled out or compressed into the first telescopic member 1.

[0043] ​​​The application provides a stepless adjustment telescopic rod, a sliding body is arranged in rotation in a second telescopic part and in sliding in a first telescopic part, and an interference top bead is located in a penetrating hole of the sliding body and a spiral groove of the second telescopic part, when the first telescopic part and the second telescopic part are rotated, the locking mechanism can be unlocked or locked, the assembly is convenient, the operation is simple, the structure is simple, the manufacturing cost is low, and the applicability is wide.

[0044] The above examples are only for illustrating the technical concept and characteristics of the application, and the purpose is to enable those skilled in the art to understand the content of the application and implement it, and cannot limit the protection scope of the application. Any equivalent changes or modifications made according to the spirit and essence of the application shall be covered within the protection scope of the application.

Claims

1. A continuously adjustable telescopic rod, comprising a first telescopic member (1) and a second telescopic member (2) that are inserted and telescopically cooperate, and a locking mechanism for locking the first telescopic member (1) and the second telescopic member (2) together, characterized in that: The locking mechanism includes at least one interference bead (4) and a sliding body (3) rotatably mounted on the second telescopic member. At least one spiral groove (22) is provided on one end of the second telescopic member (2) and one of the two sliding bodies (3), and at least one through hole (31) is provided on the other. Each interference bead (4) is located in both the corresponding through hole (31) and the spiral groove (22). The bottom of each spiral groove (22) gradually deepens from one side to the other, so that the interference bead (4) has a relatively protruding high position that abuts against the wall of the first telescopic member (1) and a relatively sunken low position that disengages from the wall of the first telescopic member (1). The sliding body (3) is slidably mounted on the first telescopic member (1) along the length direction. When the first telescopic member (1) and the second telescopic member (2) rotate relative to each other, the interference bead (4) is moved between the high position and the low position by the sliding body (3).

2. The continuously adjustable telescopic rod according to claim 1, characterized in that: The locking mechanism includes a set of locking units formed on one end of the second telescopic member (2). The locking unit includes a sliding body (3). One of the two sliding bodies (3) and one end of the second telescopic member (2) has multiple spiral grooves (22) with the same spiral direction. The other one has multiple through holes (31). Multiple interference beads (4) are inserted into the corresponding through holes (31) and spiral grooves (22).

3. The continuously adjustable telescopic rod according to claim 1, characterized in that: The locking mechanism includes two sets of locking units distributed along the length direction on one end of the second telescopic member (2). Each set of locking units includes a sliding body (3). The sliding body (3) is a sliding collar. The sliding body (3) has multiple through holes (31) in the circumferential direction. Correspondingly, one end of the second telescopic member (2) has multiple spiral grooves (22) with the same spiral direction. Multiple interference beads (4) are inserted into the corresponding through holes (31) and spiral grooves (22). The spiral directions of the spiral grooves (22) of the two sets of locking units are opposite, so that when the interference beads (4) of the two sets of locking units are in the high position, the two sliding bodies (3) are relatively far apart or relatively close.

4. The continuously adjustable telescopic rod according to claim 3, characterized in that: The two sets of locking units are symmetrically arranged on one end of the second telescopic member (2).

5. The continuously adjustable telescopic rod according to any one of claims 1-4, characterized in that: An auxiliary elastic element (5) is provided between the sliding body (3) and the second telescopic member (2), and the auxiliary elastic element (5) helps the sliding body (3) push the interference top bead (4) to a higher position.

6. The continuously adjustable telescopic rod according to claim 1, characterized in that: The first telescopic component (1) is a sleeve, the second telescopic component (2) is slidably inserted into the first telescopic component (1), and the sliding body (3) slides and engages with the inner wall of the first telescopic component (1) through at least one track.

7. The stepless adjustable telescopic rod according to claim 6, characterized in that: The second telescopic member (2) includes a second telescopic member body (21) and a locking end (23) fixed to one end of the second telescopic member body (21). The spiral groove (22) is opened on the locking end (23), and the sliding body (3) is rotatably disposed on the locking end (23).

8. The continuously adjustable telescopic rod according to claim 6, characterized in that: The first telescopic member (1) is fixed with a gripping end sleeve (11) that increases friction and facilitates the rotation of the second telescopic member (2) relative to the first telescopic member (1).

9. The continuously adjustable telescopic rod according to claim 1, characterized in that: The interference top bead (4) is a steel bead.

10. The continuously adjustable telescopic rod according to claim 1, characterized in that: The continuously adjustable telescopic rod includes multiple telescopic components, including the first telescopic component and the second telescopic component (2). Each pair of adjacent telescopic components slides together and is locked by the corresponding locking mechanism.

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