CN220705597U - Pin lock of herringbone extension ladder - Google Patents
Pin lock of herringbone extension ladder Download PDFInfo
- Publication number
- CN220705597U CN220705597U CN202322255491.1U CN202322255491U CN220705597U CN 220705597 U CN220705597 U CN 220705597U CN 202322255491 U CN202322255491 U CN 202322255491U CN 220705597 U CN220705597 U CN 220705597U
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- lock
- ladder
- pin
- core part
- locking
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- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
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- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of extension ladders, in particular to a pin lock of a herringbone extension ladder, which comprises a main ladder and an extension ladder, wherein the extension ladder is in sliding connection with one side of the main ladder; when the lock core part extends out of the lock body, the lock core part passes through the main ladder and then is clamped with the telescopic ladder to realize locking between the telescopic ladder and the main ladder, and the lock core part is positioned by the positioning device when locked; in the locked state, the lock cylinder part is driven to retract into the lock body by pulling the handle part to unlock, and the lock cylinder part is positioned by the positioning device when the lock cylinder part is unlocked; when in an unlocking state, the locking button is pressed to control the positioning device to release the unlocking core part, so that the lock core part extends out of the lock body, passes through the main ladder and is locked with the telescopic ladder.
Description
Technical Field
The utility model relates to the technical field of extension ladders, in particular to a bolt lock of a herringbone extension ladder.
Background
The Chinese patent publication No. CN200975208Y discloses a bolt lock of a herringbone telescopic ladder, which comprises a main ladder and an auxiliary ladder, wherein ladder frames of the main ladder and the auxiliary ladder are sleeves sleeved layer by layer, transverse ladder steps are hollow and fixed on the sleeves of each layer, spring pins are fixed at the end parts of the ladder steps, the spring pins are inserted into pin holes of corresponding inner layer sleeves on a longitudinal ladder frame, the spring pins in the ladder steps are connected with knobs on the ladder steps, torsion springs are fixed on the knobs, the torsion springs apply force in the direction of compressing the spring pins, and more than one pair of middle positioning pin holes are formed on the corresponding two inner layer sleeves of the ladder steps of the main ladder or the auxiliary ladder. During operation of the prior art, the knob is rotated, the spring pin is pulled out of the pin hole, the inner sleeve can move up and down, the knob is loosened, the spring pin is correspondingly loosened, but because the corresponding position of the inner sleeve is free of the pin hole, the inner sleeve can continue to move, when other pin holes of the inner sleeve come to the spring pin, the spring pin pops out and is clamped into the pin hole on the inner sleeve, and because the torsion spring for applying force to the direction of the compression spring pin is added, under the condition that no enough external force acts, the knob can not rotate accidentally to enable the spring pin to be separated from the pin hole, and safety is improved. However, the prior art still has structural defects, when the knob is loosened, the spring pin is correspondingly loosened, so that the spring pin is always in contact with the inner sleeve to form resistance, the inner sleeve is inconvenient to adjust, and if no resistance exists between the spring pin and the inner sleeve, the knob is required to be pulled all the time to drive the spring pin to be not in contact with the inner sleeve, so that the operation is very inconvenient.
Thus, there is room for improvement in the art.
Disclosure of Invention
According to the utility model, in a locked state, the handle part is pulled to drive the lock core part to retract into the lock body to unlock, and after the handle part is released, the lock core part is not in contact with the telescopic ladder and has no resistance under the action of the positioning device, so that the telescopic ladder can be conveniently adjusted, after the adjustment is finished, the lock core part is controlled to release the lock core part by pressing the locking button, the lock core part extends out of the lock body, the lock body is locked with the clamping position of the telescopic ladder after passing through the main ladder, the lock core part is unlocked and locked by a one-pull-one-press action mode, and the operation is very convenient.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the lock pin of the herringbone telescopic ladder comprises a main ladder and a telescopic ladder, wherein the telescopic ladder is in sliding connection with one side of the main ladder, the other side of the main ladder is fixedly provided with the lock pin, the lock pin comprises a lock body, a lock pin and a locking button, the lock body is fixedly arranged on the main ladder, one end of the lock pin is provided with a handle part, the handle part is positioned outside the lock body, the other end of the lock pin is provided with a lock core part, and the lock core part can extend out of the lock body or retract into the lock body; when the lock core part extends out of the lock body, the lock core part passes through the main ladder and then is clamped with the telescopic ladder to realize locking between the telescopic ladder and the main ladder, and the lock core part is positioned by the positioning device when locked; in the locked state, the lock cylinder part is driven to retract into the lock body by pulling the handle part to unlock, and the lock cylinder part is positioned by the positioning device when the lock cylinder part is unlocked; when in an unlocking state, the locking button is pressed to control the positioning device to release the unlocking core part, so that the lock core part extends out of the lock body, passes through the main ladder and is locked with the telescopic ladder.
According to the scheme, the positioning device comprises a lock plate, the lock plate is clamped at one end of the lock cylinder part close to the handle part, a pin is fixed at one end of the lock cylinder part far away from the handle part, a first spring is sleeved on a lock core part between the pin and the lock plate, and a clamping groove is formed in the lock cylinder part between the pin and the lock plate; and a second spring is arranged between the locking plate and the inner wall of the lock body, one end of the locking plate, which is far away from the second spring, is abutted with a locking button, and one end of the locking button penetrates out of the lock body.
According to the scheme, the locking plate is perpendicular to the lock core part.
According to the scheme, the locking plate is of a U-shaped structure, the opening of the locking plate is provided with the limiting groove, one end of the locking button is located in the limiting groove, a slotted hole is formed between the locking button and the locking plate, the locking core part is arranged in the slotted hole in a penetrating mode, the inner wall of the locking plate is provided with the buckling part, and the buckling part is abutted to the outer wall of the lock core part.
According to the scheme, the outer wall of one end of the lock body, which is close to the handle part, is provided with an unlocking mark, and the outer wall of one end of the lock body, which is close to the locking button, is provided with a locking mark.
According to the scheme, the lock body comprises the lock shell and the lock cover, the lock shell is fixed on the main ladder through the bolts, the lock cover is detachably arranged on the lock shell, and the spring is located between the inner wall of the lock cover and the locking plate.
According to the scheme, the inner wall of the lock cover is provided with the groove which is matched and abutted with the second spring.
According to the scheme, the main ladder is provided with the mounting hole for fixing the lock body and the lock pin perforation for penetrating out the lock core part, and the telescopic ladder is provided with a plurality of lock pin positioning holes at intervals for being matched with the lock core part in a clamping mode.
According to the scheme, one side of the main ladder, which is close to the telescopic ladder, is provided with the sliding groove, and the telescopic ladder is arranged in the sliding groove in a sliding way.
The utility model has the beneficial effects that:
when the lock is in a locked state, the lock core is driven to retract into the lock body by pulling the handle part, and after the handle part is loosened, the lock core is not in butt joint with the telescopic ladder under the action of the positioning device and has no resistance, so that the telescopic ladder can be conveniently adjusted, after the adjustment is finished, the lock core is loosened by pressing the locking button to control the positioning device, the lock core extends out of the lock body, the lock core is locked with the telescopic ladder after penetrating through the main ladder, and the lock core is unlocked and locked in a one-pull one-press action mode, so that the operation is very convenient.
Drawings
FIG. 1 is an overall construction diagram of the herringbone extension ladder of the present utility model;
FIG. 2 is a partial block diagram of the assembly of the herringbone extension ladder and the deadbolt lock of the present utility model;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is an overall block diagram of the deadbolt lock of the present utility model;
FIG. 5 is a view of the lock housing of FIG. 4 with the lock housing removed;
FIG. 6 is an exploded view of FIG. 5;
FIG. 7 is an assembled view of the lock button and locking tab of the present utility model;
FIG. 8 is an unlocked state diagram of the present utility model;
fig. 9 is a locked state diagram of the present utility model.
In the figure: 1. a main ladder; 11. perforating a lock pin; 12. a mounting hole; 13. a chute; 2. a telescopic ladder; 21. a lock pin positioning hole; 3. a latch lock; 31. a lock case; 32. a locking pin; 33. locking the button; 34. a locking cover; 35. a clamping groove; 36. a first spring; 37. a pin; 38. a second spring; 39. a locking plate; 311. a slot hole; 312. a fastening part; 313. a limit groove; 314. locking the mark; 315. unlocking marks; 316. a handle portion; 317. a lock core portion.
Detailed Description
The technical scheme of the utility model is described below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 9, the latch lock of the herringbone telescopic ladder of the utility model comprises a main ladder 1 and a telescopic ladder 2, wherein the telescopic ladder 2 is in sliding connection with one side of the main ladder 1, the other side of the main ladder 1 is fixedly provided with a latch lock 3, the latch lock 3 comprises a lock body, a lock pin 32 and a locking button 33, the lock body is fixedly arranged on the main ladder 1, one end of the lock pin 32 is provided with a handle part 316, the handle part 316 is positioned outside the lock body, the other end of the lock pin 32 is provided with a lock core part 317, and the lock core part 317 can extend out of the lock body or retract into the lock body; when the lock core 317 extends out of the lock body, the lock core 317 passes through the main ladder 1 and then is clamped with the telescopic ladder 2 to lock the telescopic ladder 2 and the main ladder 1, and the lock core 317 is positioned by the positioning device; in the locked state, the handle part 316 is pulled to drive the lock core part 317 to retract into the lock body to unlock, and the positioning device is used for positioning the lock core part 317 when unlocking; in the unlocking state, the lock core 317 is released by pressing the lock button 33 to control the positioning device, so that the lock core 317 extends out of the lock body, passes through the main ladder 1 and is locked with the telescopic ladder 2. In the locking state, the handle part 316 is pulled to drive the lock core part 317 to retract into the lock body to unlock, and after the handle part 316 is released, the lock core part 317 is not in contact with the telescopic ladder 2 under the action of the positioning device and has no resistance, so that the telescopic ladder 2 can be conveniently adjusted, after the adjustment is finished, the lock core part 317 is controlled to release the lock core part 317 by pressing the locking button 33, the lock core part 317 extends out of the lock body to be locked with the telescopic ladder 2 after passing through the main ladder 1, the unlocking and locking of the lock core part 317 are realized in a one-pull one-press action mode, the operation is very convenient, the positioning effect is ideal, and the risk of sliding between the telescopic ladder 2 and the main ladder 1 can not occur after the positioning.
It should be noted that, a bend is disposed between the handle portion 316 and the lock core portion 317, and a rubber sleeve is sleeved on the handle portion 316, so that the operation is more convenient.
More specifically, the positioning device includes a lock piece 39, the lock piece 39 is clamped at a position of one end of the lock core 317 near the handle 316, a pin 37 is fixed at one end of the lock core 317 far away from the handle 316, a first spring 36 is sleeved on the lock core 317 between the pin 37 and the lock piece 39, and a clamping groove 35 is provided on the lock core 317 between the pin 37 and the lock piece 39; a second spring 38 is arranged between the locking piece 39 and the inner wall of the lock body, one end of the locking piece 39 away from the second spring 38 is abutted with a locking button 33, and one end of the locking button 33 penetrates out of the lock body. In the locked state, the locking piece 39 is always abutted against the lock core part 317 under the action of the second spring 38, so that a pushing force is applied to the lock core part 317, a positioning function is realized, the displacement of the lock core part 317 can be prevented, and the positioning effect is better; when unlocking, the handle 316 is pulled to drive the lock core 317 to retract into the lock body until the lock piece 39 and the clamping groove 35 are matched to be clamped (when the pulling force overcomes the elastic force of the second spring 38, the lock core 317 can be driven to displace, when the lock piece 39 corresponds to the clamping groove 35, the second spring 38 in compression pushes the lock piece 39 to be clamped into the clamping groove 35), at this time, the lock core 317 is locked by the lock piece 39, and meanwhile, a pushing force is given to the lock core 317, and the first spring 36 is in compression at this time; in the unlocking state, the locking button 33 is pressed to push the locking piece 39 to displace, so that the locking piece 39 is separated from the clamping groove 35, the rebound force of the first spring 36 is released, the pushing pin 37 drives the lock core 317 to extend out of the lock body, and the locking is realized by penetrating through the main ladder 1 and then clamping the telescopic ladder 2.
The elastic force of the second spring 38 tends to make the lock piece 39 always abut against the key cylinder portion 317, and the lock piece 39 is pushed open against the elastic force of the second spring 38 only when the lock button 33 is pressed.
In this embodiment, the locking piece 39 is disposed perpendicular to the locking core 317. So that the spring force of the second spring 38 pushes the locking piece 39 to push the locking core 317, and the spring force of the first spring 36 is not interfered, that is, the spring force of the second spring 38 does not affect the pushing force of the locking piece 39 to the locking core 317 whether the first spring 36 is in a compressed state or not.
In this embodiment, the locking piece 39 has a U-shaped structure, the opening of the locking piece 39 is provided with a limiting groove 313, one end of the locking button 33 is located in the limiting groove 313, a slot 311 is formed between the locking button 33 and the locking piece 39, the lock core portion 317 is disposed in the slot 311 in a penetrating manner, the inner wall of the locking piece 39 is provided with a fastening portion 312, and the fastening portion 312 abuts against the outer wall of the lock core portion 317. So that the locking button 33 always abuts against the locking piece 39 under the action of the elastic force of the second spring 38.
It should be noted that, the fastening portion 312 is provided with an arc-shaped slot for being more stable and reliable when being fastened with the fastening slot 35.
In this embodiment, an unlocking mark 315 is provided on an outer wall of one end of the lock body, which is close to the handle 316, and a locking mark 314 is provided on an outer wall of one end of the lock body, which is close to the locking button 33. The user can operate according to the indication conveniently.
In this embodiment, the lock body includes a lock shell 31 and a lock cover 34, the lock shell 31 is fixed on the main ladder 1 by bolts, the lock cover 34 is detachably mounted on the lock shell 31, and the second spring 38 is located between the inner wall of the lock cover 34 and the locking piece 39. And the post maintenance can be facilitated.
In this embodiment, a groove matched and abutted with the second spring 38 is provided on the inner wall of the lock cover 34. The positioning effect of the second spring 38 is better, and the second spring 38 is prevented from sliding relative to the inner wall of the lock cover 34 when compressed.
In this embodiment, the main ladder 1 is provided with a mounting hole 12 for fixing the lock body and a locking pin through hole 11 for penetrating the lock core 317, and the telescopic ladder 2 is provided with a plurality of locking pin positioning holes 21 for matching and clamping with the lock core 317 at intervals. The structure is simple, and the installation is convenient.
In this embodiment, a sliding groove 13 is provided on one side of the main ladder 1 close to the telescopic ladder 2, and the telescopic ladder 2 is slidably disposed in the sliding groove 13.
The number of the latch locks on the herringbone extension ladder is plural, so that the load bearing of the extension ladder 2 in the extending state can be ensured, and the safety is high.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative, not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are all within the scope of the present utility model.
Claims (9)
1. The utility model provides a pin lock of herringbone extension ladder, includes main ladder and extension ladder, its characterized in that:
the telescopic ladder is in sliding connection with one side of the main ladder, a latch lock is fixed on the other side of the main ladder and comprises a lock body, a lock pin and a locking button, the lock body is fixed on the main ladder, one end of the lock pin is provided with a handle part, the handle part is positioned outside the lock body, the other end of the lock pin is provided with a lock core part, the lock core part can extend out of the lock body or retract into the lock body, and the lock core part is correspondingly provided with a positioning device;
when the lock core part extends out of the lock body, the lock core part passes through the main ladder and then is clamped with the telescopic ladder to lock the telescopic ladder and the main ladder, and the lock core part is positioned by the positioning device when locked;
in the locked state, the lock cylinder part is driven to retract into the lock body by pulling the handle part to unlock, and the lock cylinder part is positioned by the positioning device when the lock cylinder part is unlocked;
when in an unlocking state, the locking button is pressed to control the positioning device to release the unlocking core part, so that the lock core part extends out of the lock body, passes through the main ladder and is locked with the telescopic ladder.
2. The lock pin of a herringbone extension ladder of claim 1, wherein: the positioning device comprises a lock plate, the lock plate is clamped at one end of the lock cylinder part, which is close to the handle part, a pin is fixed at one end of the lock cylinder part, which is far away from the handle part, a first spring is sleeved on a lock core part between the pin and the lock plate, and a clamping groove is formed in the lock cylinder part between the pin and the lock plate; a second spring is arranged between the locking piece and the inner wall of the lock body, one end, away from the second spring, of the locking piece is abutted to a locking button, and one end of the locking button penetrates out of the lock body to be arranged.
3. A pin lock for a herringbone extension ladder as claimed in claim 2, wherein: the lock plate is perpendicular to the lock core portion.
4. A pin lock for a herringbone extension ladder as claimed in claim 2, wherein: the locking plate is of a U-shaped structure, a limiting groove is formed in an opening of the locking plate, one end of the locking button is located in the limiting groove, a groove hole is formed between the locking button and the locking plate, the lock core portion penetrates through the groove hole, a buckling portion is arranged on the inner wall of the locking plate, and the buckling portion is abutted to the outer wall of the lock core portion.
5. A pin lock for a herringbone extension ladder as claimed in claim 2, wherein: the lock body is close to the one end outer wall of handle portion and is equipped with the mark of unblanking, the lock body is close to the one end outer wall of pinning the button and is equipped with the mark of pinning.
6. A pin lock for a herringbone extension ladder as claimed in claim 2, wherein: the lock body comprises a lock shell and a lock cover, the lock shell is fixed on the main ladder through bolts, the lock cover is detachably arranged on the lock shell, and the spring is located between the inner wall of the lock cover and the locking plate.
7. The herringbone telescoping ladder latch lock of claim 6, wherein: the inner wall of the lock cover is provided with a groove which is matched and abutted with the second spring.
8. The lock pin of a herringbone extension ladder of claim 1, wherein: the main ladder is provided with a mounting hole for fixing the lock body and a lock pin perforation for penetrating out the lock core part, and the telescopic ladder is provided with a plurality of lock pin positioning holes at intervals for being clamped with the lock core part in a matching way.
9. The lock pin of a herringbone extension ladder of claim 1, wherein: the main ladder is close to the one side of extension ladder and is equipped with the spout, the extension ladder slides and locates in the spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322255491.1U CN220705597U (en) | 2023-08-22 | 2023-08-22 | Pin lock of herringbone extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322255491.1U CN220705597U (en) | 2023-08-22 | 2023-08-22 | Pin lock of herringbone extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220705597U true CN220705597U (en) | 2024-04-02 |
Family
ID=90437057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322255491.1U Active CN220705597U (en) | 2023-08-22 | 2023-08-22 | Pin lock of herringbone extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220705597U (en) |
-
2023
- 2023-08-22 CN CN202322255491.1U patent/CN220705597U/en active Active
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