A locking mechanism applied to telescopic sleeve and a baby carriage

Abstract

The utility model discloses a locking mechanism and perambulator applied to telescopic sleeve, including outer sleeve and inner sleeve, the inner sleeve is slidably connected in the outer sleeve inner chamber, the outer sleeve inner chamber lateral wall is opposite fixedly provided with the inlayed clamping strip, be provided with the locking portion on the inlayed clamping strip, the inner sleeve is movably provided with the locking piece for with the locking portion locking cooperation to with the inner sleeve relative outer sleeve locking on, still be provided with the unlocking piece of linkage with the locking piece on the inner sleeve, and when the locking piece with the locking portion locking cooperation, the free end of locking piece is always limited in the outer sleeve inner chamber side, through with the inlayed clamping strip of locking portion integration in the outer sleeve inner chamber, make the cooperation of locking piece and locking portion completely take place in the internal space of outer sleeve, and the free end of locking piece is always limited in the outer sleeve inner chamber side, does not stretch out in the outer side boundary of outer sleeve, effectively solve the problem of locking piece exposure, make telescopic sleeve whole external structure more neat, simple.

Description

[Technical Field]

[0001] This utility model relates to a locking mechanism for telescopic sleeves and a stroller. [Background Technology]

[0002] Currently, telescopic sleeves are widely used in medical devices, smart home devices, daily furniture and children's travel products. Their core function is to adjust the length or position by sliding to meet the needs of different scenarios.

[0003] Currently, telescopic sleeves typically use a locking structure with side wall openings and pins for locking and positioning. However, this approach has the following drawbacks:

[0004] 1. Since the side wall opening is directly opened on the side wall of the pipe fitting, the pin needs to pass through the through hole and cooperate with it, resulting in the pin being exposed at least partially outside the pipe fitting. This exposed structure destroys the overall appearance integrity of the expansion sleeve, resulting in the expansion sleeve not being neat and simple in shape.

[0005] 2. The opening in the side wall compromises the sealing of the pipe side wall. Moreover, the side wall opening is a through hole structure. After long-term use, stains will inevitably accumulate at the side wall opening, and corresponding lubricating oil will inevitably seep out. When people touch the outer opening of the side wall opening, it is easy to get dirty, thus causing inconvenience in use.

[0006] 3. The openings in the side walls disrupt the integrity of the pipe fitting surface, allowing dust, moisture, and other substances to easily enter the pipe fitting through the openings, accelerating the wear and corrosion of its internal metal parts and reducing its service life.

[0007] 4. Stress concentration occurs at the openings in the sidewalls, which can easily lead to fatigue failure when the pipe is subjected to bending or torsion, and also reduces the overall mechanical strength of the casing.

[0008] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0009] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a locking mechanism and stroller for use in telescopic sleeves. By integrating the locking part into the embedded strip in the inner cavity of the outer sleeve, the cooperation between the locking part and the locking component occurs entirely within the inner space of the outer sleeve. At the same time, the free end of the locking component is always restricted to the inner cavity side of the outer sleeve and does not extend beyond the outer boundary of the outer sleeve, effectively solving the problem of exposed locking components and making the overall external structure of the telescopic sleeve neater and simpler.

[0010] To solve the above-mentioned technical problems, this utility model provides a locking mechanism for telescopic sleeves, including an outer sleeve 1 and an inner sleeve 2. The inner sleeve 2 is slidably connected to the inner cavity of the outer sleeve 1. An embedded retaining strip 3 is fixedly provided on the inner wall of the inner cavity of the outer sleeve 1. A locking part 4 is provided on the embedded retaining strip 3. A locking member 5 is movably provided on the inner sleeve 2 for locking with the locking part 4 to lock the inner sleeve 2 relative to the outer sleeve 1. An unlocking member 51 is also provided on the inner sleeve 2 and is linked with the locking member 5. When the locking member 5 is locked with the locking part 4, the free end of the locking member 5 is always restricted to the inner cavity side of the outer sleeve 1.

[0011] As described above, in a locking mechanism for a telescopic sleeve, a plurality of locking parts 4 are spaced apart along the length of the embedded retaining strip 3, and the locking member 5 is configured to lock in cooperation with the corresponding locking part 4 so that the inner sleeve 2 can be locked relative to the outer sleeve 1 in multiple positions.

[0012] As described above, a locking mechanism for a telescopic sleeve includes an embedded retaining strip 3 comprising a first sidewall 31 and a second sidewall 32. The first sidewall 31 is fitted against the inner wall of the outer sleeve 1, and the second sidewall 32 is disposed opposite to the first sidewall 31 and faces the inner sleeve 2. The locking part 4 is disposed on the second sidewall 32.

[0013] As described above, a locking mechanism applied to a telescopic sleeve has a lower connecting seat 11 connected to the lower end of the outer sleeve 1 and a sleeve plug 12 connected to the upper end of the outer sleeve 1. The upper and lower ends of the embedded locking strip 3 are respectively provided with limiting structures between the sleeve plug 12 and the lower connecting seat 11 to restrict the movement of the embedded locking strip 3 relative to the outer sleeve 1 in the axial and radial directions.

[0014] As described above, a locking mechanism applied to a telescopic sleeve includes an insert tenon 33 at the lower end of the embedded locking strip 3, and a positioning hole 111 on the lower connecting seat 11 that engages with the insert tenon 33. The sleeve plug 12 includes a plug connecting part 121 that engages with the upper end of the outer sleeve 1. The outer end of the plug connecting part 121 is connected to a plug limiting part 122 for abutting against the upper end of the outer sleeve 1. A limiting notch 123 is formed on the outer side wall of the inner end of the plug connecting part 121. When the plug connecting part 121 is inserted into the outer sleeve 1, the upper end of the embedded locking strip 3 is embedded in the limiting space 124 formed by the limiting notch 123 and the inner wall of the outer sleeve 1.

[0015] As described above, a locking mechanism applied to a telescopic sleeve is provided with a snap-fit ​​hole 13 on the upper part of the outer sleeve 1, and a snap-fit ​​protrusion 125 on the sleeve plug 12 that engages with the snap-fit ​​hole 13.

[0016] As described above, a locking mechanism applied to a telescopic sleeve is provided, wherein a fixed seat 21 is embedded at the lower end of the inner sleeve 2, and the fixed seat 21 is provided with a mounting groove 211 for sliding the locking member 5. A locking elastic member 212 for driving the locking member 5 to elastically reset is provided between the locking member 5 and the mounting groove 211. One end of the locking elastic member 212 elastically abuts against the inner end of the locking member 5, and the other end of the locking elastic member 212 elastically abuts against the bottom of the mounting groove 211.

[0017] As described above, a locking mechanism applied to a telescopic sleeve has a mounting groove 211 with a groove opening 213, and the inner sleeve 2 has a sleeve through hole 22 on its side wall that communicates with the groove opening 213 and is used for the free end of the locking member 5 to pass through.

[0018] As described above, a locking mechanism applied to a telescopic sleeve is provided at the lower end of the inner sleeve 2, which can abut against the inner end of the sleeve plug 12 of the outer sleeve 1 to restrict the inner sleeve 2 from disengaging from the outer sleeve 1.

[0019] This utility model also provides a children's stroller, including a frame, the frame including a telescopic push rod assembly, the push rod assembly adopting a locking mechanism applied to a telescopic sleeve as described above, the push rod assembly including an upper push rod and a lower push rod, the upper push rod being an inner sleeve 2, and the lower push rod being an outer sleeve 1.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. This utility model integrates the locking part into the embedded retaining strip inside the outer tube cavity, so that the cooperation between the locking element and the locking part occurs entirely within the inner space of the outer tube. At the same time, the free end of the locking element is always restricted to the inner side of the outer tube cavity and does not protrude outside the outer tube, effectively solving the problem of the locking element being exposed. This makes the overall external structure of the telescopic sleeve neater and simpler, and keeps the surface of the outer tube hygienic and clean. In addition, it can also prevent external objects from interfering with the cooperation between the locking element and the locking part, ensuring smooth and reliable locking.

[0022] 2. The embedded locking strip is fixed relative to the outer sleeve, providing a structural carrier for the locking part and enhancing the bending resistance of this part of the outer sleeve, preventing deformation of the outer sleeve, and ensuring smooth sliding of the inner sleeve relative to the outer sleeve, as well as smooth unlocking.

[0023] 3. Limiting structures are provided at the upper and lower ends of the embedded retaining strip between the sleeve retainer and the lower connecting seat, respectively. Through these limiting structures, the axial and radial movement of the embedded retaining strip relative to the outer sleeve can be restricted, ensuring that the embedded retaining strip is reliably positioned relative to the outer sleeve. [Attached Image Description]

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a perspective view of Embodiment 1 of the present utility model.

[0026] Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model.

[0027] Figure 3 for Figure 2 An enlarged diagram of A in the diagram.

[0028] Figure 4 for Figure 2 Enlarged diagram of B in the diagram.

[0029] Figure 5 for Figure 2 An enlarged diagram of C in the diagram.

[0030] Figure 6 This is an exploded view of Embodiment 1 of this utility model.

[0031] Figure 7 This is a cross-sectional view of Embodiment 2 of the present invention.

Detailed Implementation Methods

[0032] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] like Figure 1-6 As shown, this utility model discloses a locking mechanism for a telescopic sleeve, comprising an outer sleeve 1 and an inner sleeve 2. The inner sleeve 2 is slidably connected to the inner cavity of the outer sleeve 1. An embedded retaining strip 3 is fixedly provided on the side wall of the inner cavity of the outer sleeve 1. The embedded retaining strip 3 is made of plastic and has rigidity. A locking part 4 is provided on the embedded retaining strip 3, such as... Figure 4 , 6 As shown, the locking part 4 is a locking through hole provided on the embedded card strip 3; as Figure 7 As shown, the locking part 4 is a locking blind hole provided on the embedded retaining strip 3. The inner sleeve 2 is movably provided with a locking member 5 for locking with the locking part 4 to lock the inner sleeve 2 relative to the outer sleeve 1. The inner sleeve 2 is also provided with an unlocking member 51 that is linked with the locking member 5. When the locking member 5 is locked with the locking part 4, the free end of the locking member 5 is always restricted to the inner cavity side of the outer sleeve 1. This utility model integrates the locking part into the embedded retaining strip in the inner cavity of the outer sleeve, so that the cooperation between the locking member and the locking part occurs entirely in the inner space of the outer sleeve. At the same time, the free end of the locking member is always restricted to the inner cavity side of the outer sleeve and does not protrude outside the outer sleeve, effectively solving the problem of the locking member being exposed. This makes the overall external structure of the telescopic sleeve neater and simpler, and keeps the surface of the outer sleeve clean. In addition, it can also avoid external objects interfering with the cooperation between the locking member and the locking part, ensuring smooth sliding and unlocking.

[0034] like Figure 6 As shown, multiple locking parts 4 are spaced apart along the length of the embedded retaining strip 3. Adjacent locking parts 4 can be equidistant or non-equidistant. The locking member 5 is configured to lock in cooperation with the corresponding locking part 4 to selectively lock the inner sleeve 2 relative to the outer sleeve 1 at different positions, thus meeting the locking requirements for different length extensions.

[0035] Furthermore, in order to lock the inner sleeve 2 relative to the outer sleeve 1 in the retracted state, the lower part of the embedded clip 3 is provided with a locking part 4. When the inner sleeve 2 retracts relative to the outer sleeve 1, the locking member 5 locks with the locking part 4 at the lower part of the embedded clip 3, thereby preventing the inner sleeve 2 from automatically extending relative to the outer sleeve 1 when it is fully retracted, which would affect the use effect.

[0036] like Figure 1-6 As shown, the embedded card strip 3 includes a first sidewall 31 and a second sidewall 32. The first sidewall 31 is attached to the inner cavity sidewall of the outer sleeve 1, and the second sidewall 32 is disposed opposite to the first sidewall 31 and faces the inner sleeve 2. The locking part 4 is disposed on the second sidewall 32.

[0037] like Figure 1-6 As shown, in order to ensure reliable positioning of the inner clip relative to the outer tube and convenient assembly, the lower end of the outer tube 1 is connected to the lower connecting seat 11, and the upper end of the outer tube 1 is connected to the sleeve plug 12. The upper and lower ends of the inner clip 3 are respectively provided with limiting structures between the sleeve plug 12 and the lower connecting seat 11 to restrict the inner clip 3 from moving axially and radially relative to the outer tube 1. Specifically, the lower end of the embedded clip 3 is provided with a tenon 33, and the lower connecting seat 11 is provided with a positioning hole 111 that engages with the tenon 33; the sleeve plug 12 includes a plug connecting part 121 that engages with the upper end of the outer sleeve 1, the outer end of the plug connecting part 121 is connected with a plug limiting part 122 for abutting against the upper end of the outer sleeve 1, and the outer side wall of the inner end of the plug connecting part 121 forms a limiting notch 123. When the plug connecting part 121 is inserted into the outer sleeve 1, the upper end of the embedded clip 3 is embedded in the limiting space 124 formed by the limiting notch 123 and the inner side wall of the outer sleeve 1. During assembly, simply install the inner clip 3 from top to bottom into the inner cavity of the outer tube, so that the tenon 33 of the inner clip 3 is inserted into the positioning hole 111. Then, insert the plug connection part 121 of the sleeve plug 12 into the outer tube 1, so that the upper end of the inner clip 3 is embedded into the limiting notch 123 and the limiting space 124 formed by the inner cavity side wall of the outer tube 1. Therefore, it has the characteristics of convenient assembly and reliable limiting.

[0038] like Figure 6As shown, for ease of assembly, the upper part of the outer sleeve 1 is provided with a snap-fit ​​hole 13, and the sleeve plug 12 is provided with a snap-fit ​​protrusion 125 that engages with the snap-fit ​​hole 13. The snap-fit ​​protrusion 125 is designed with a barbed structure, allowing it to elastically snap into the snap-fit ​​hole 13. During assembly, when the sleeve plug 12 is inserted into the preset position at the upper end of the outer sleeve 1, the snap-fit ​​protrusion 125 automatically snaps into the snap-fit ​​hole 13, thus ensuring a reliable connection between the sleeve plug 12 and the upper end of the outer sleeve 1.

[0039] like Figure 4 , 6 As shown, in order to prevent the inner sleeve from extending out of the outer sleeve, a limiting sleeve 23 is provided at the lower end of the inner sleeve 2. The limiting sleeve 23 has a clearance through hole for the free end of the locking member 5 to pass through. When the inner sleeve extends to its limit length, the limiting sleeve 23, which is fixed at the lower part of the inner sleeve, abuts against the inner end of the sleeve plug 12 of the outer sleeve 1, thus achieving the limiting effect.

[0040] like Figure 4 , 6 As shown, a fixing seat 21 is embedded in the lower end of the inner sleeve 2. The fixing seat 21 is provided with a mounting groove 211 for radial sliding of the locking member 5. The mounting groove 211 has a groove opening 213. The side wall of the inner sleeve 2 is provided with a sleeve through hole 22 that communicates with the groove opening 213 and is used for the free end of the locking member 5 to pass through. A locking elastic member 212 is provided between the locking member 5 and the mounting groove 211 for driving the locking member 5 to elastically reset. One end of the locking elastic member 212 elastically abuts against the inner end of the locking member 5, and the other end of the locking elastic member 212 elastically abuts against the bottom of the mounting groove 211. Under normal conditions, the locking elastic member 212 elastically presses against the locking member 5, so that the locking member 5 remains inserted into the locking part 4, or so that the locking member 5 has a tendency to insert into the locking part 4. The unlocking member 51 is linked to the locking member 5 through a steel rope or other linkage mechanism. When unlocking, the user operates the unlocking action of the linkage locking member 51, causing the free end of the locking member 5 to exit the corresponding locking part 4, thereby releasing the locking state of the inner sleeve 2 relative to the outer sleeve 1. Then, the user operates the inner sleeve 2 to extend or retract to the preset position relative to the outer sleeve 1, canceling the force on the unlocking member 51. At this moment, the locking member 5 automatically locks with the corresponding locking part 4 under the elastic force of the locking elastic member 212.

[0041] This utility model discloses a children's stroller, including a frame. The frame includes a retractable push rod assembly. The push rod assembly employs a locking mechanism as described above for telescopic sleeves. Specifically, the push rod assembly includes an upper push rod and a lower push rod. The upper push rod is an inner sleeve 2, and the lower push rod is an outer sleeve 1. Therefore, by adopting the above-mentioned locking mechanism, the outer surface of the lower push rod is simpler and can be kept clean during use, avoiding the problem of stains easily accumulating at the locking through-holes that are commonly found on the side of conventional lower push rods.

Claims

1. A locking mechanism for use in telescopic sleeves, characterized in that... The device includes an outer tube (1) and an inner tube (2). The inner tube (2) is slidably connected to the inner cavity of the outer tube (1). An embedded retaining strip (3) is fixedly provided on the inner wall of the inner cavity of the outer tube (1). A locking part (4) is provided on the embedded retaining strip (3). A locking member (5) is movably provided on the inner tube (2) for locking with the locking part (4) to lock the inner tube (2) relative to the outer tube (1). An unlocking member (51) is also provided on the inner tube (2) and is linked with the locking member (5). When the locking member (5) locks with the locking part (4), the free end of the locking member (5) is always restricted to the inner cavity side of the outer tube (1).

2. The locking mechanism applied to a telescopic sleeve according to claim 1, characterized in that... Multiple locking parts (4) are spaced apart along the length of the embedded strip (3), and the locking member (5) is configured to lock in cooperation with the corresponding locking part (4) so ​​that the inner sleeve (2) can be locked relative to the outer sleeve (1) in multiple positions.

3. The locking mechanism for a telescopic sleeve according to claim 1, characterized in that... The embedded clip (3) includes a first sidewall (31) and a second sidewall (32). The first sidewall (31) is fitted with the inner cavity sidewall of the outer sleeve (1). The second sidewall (32) is disposed opposite to the first sidewall (31) and faces the inner sleeve (2). The locking part (4) is disposed on the second sidewall (32).

4. The locking mechanism applied to a telescopic sleeve according to claim 1, characterized in that... The lower end of the outer tube (1) is connected to a lower connecting seat (11), and the upper end of the outer tube (1) is connected to a sleeve plug (12). The upper and lower ends of the inner clip (3) are respectively provided with limiting structures between the sleeve plug (12) and the lower connecting seat (11) to restrict the inner clip (3) from moving relative to the outer tube (1) in the axial and radial directions.

5. The locking mechanism for a telescopic sleeve according to claim 4, characterized in that... The lower end of the embedded clip (3) is provided with a tenon (33), and the lower connecting seat (11) is provided with a positioning hole (111) that engages with the tenon (33); the sleeve plug (12) includes a plug connecting part (121) that engages with the upper end of the outer sleeve (1), the outer end of the plug connecting part (121) is connected with a plug limiting part (122) for abutting against the upper end of the outer sleeve (1), and the outer side wall of the inner end of the plug connecting part (121) forms a limiting notch (123). When the plug connecting part (121) is inserted into the outer sleeve (1), the upper end of the embedded clip (3) is embedded in the limiting space (124) formed by the limiting notch (123) and the inner cavity side wall of the outer sleeve (1).

6. The locking mechanism for a telescopic sleeve according to claim 4, characterized in that... The upper part of the outer sleeve (1) is provided with a snap-fit ​​hole (13), and the sleeve plug (12) is provided with a snap-fit ​​protrusion (125) that engages with the snap-fit ​​hole (13).

7. A locking mechanism for a telescopic sleeve according to any one of claims 1-6, characterized in that... The lower end of the inner sleeve (2) is fitted with a fixing seat (21). The fixing seat (21) is provided with a mounting groove (211) for the locking member (5) to slide. Between the locking member (5) and the mounting groove (211), there is a locking elastic member (212) for driving the locking member (5) to elastically reset. One end of the locking elastic member (212) elastically abuts against the inner end of the locking member (5), and the other end of the locking elastic member (212) elastically abuts against the bottom of the mounting groove (211).

8. The locking mechanism for a telescopic sleeve according to claim 7, characterized in that... The mounting groove (211) has a groove opening (213), and the inner sleeve (2) has a sleeve through hole (22) on its side wall that communicates with the groove opening (213) and is used for the free end of the locking member (5) to pass through.

9. A locking mechanism for a telescopic sleeve according to claim 7, characterized in that... The lower end of the inner sleeve (2) is also provided with a limiting sleeve (23) that can abut against the inner end of the sleeve plug (12) of the outer sleeve (1) to restrict the inner sleeve (2) from detaching from the outer sleeve (1).

10. A children's stroller, characterized in that... The vehicle includes a frame, the frame including a telescopic push rod assembly, the push rod assembly employing a locking mechanism for a telescopic sleeve as described in any one of claims 1-9, the push rod assembly including an upper push rod and a lower push rod, the upper push rod being an inner sleeve (2) and the lower push rod being an outer sleeve (1).

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