Pull rod device

Abstract

The utility model provides a pull rod device which comprises a sash fixing rod, a first pull rod, a second pull rod and a sliding block assembly. The sash fixing rod is provided with a first sliding groove, a second sliding groove and a strip-shaped hole, and the strip-shaped hole penetrates from the bottom wall of the second sliding groove to the upper surface of the sash fixing rod. The sliding block assembly is arranged in the second sliding groove in a sliding mode from the bottom of the sash fixing rod, the first end of the first pull rod is hinged to the window frame, and the second end of the first pull rod is hinged to the sliding block assembly through a pin shaft penetrating through the strip-shaped hole. The first end of the second pull rod is hinged to the sash fixing rod, the second end of the second pull rod is hinged between the first end and the second end of the first pull rod, when the second end of the first pull rod rotates relative to the sash fixing rod, the second pull rod rotates relative to the first pull rod and the sash fixing rod, and the sliding block assembly slides in the second sliding groove. The sliding block assembly can be prevented from being separated from the second sliding groove when the window sash is opened in an inverted mode.

Description

Technical Field

[0001] The utility model relates to the field of door and window hardware, and more specifically, to a pull rod device. Background Art

[0002] Inward opening and tilting windows are achieved by operating the handle of the window sash to drive the corresponding movement of the hardware actuator, so that the window sash can be opened horizontally or tilted to a certain angle. In order to achieve the inward tilt of the window sash, a pull rod device must be installed between the window sash and the window frame, such as Figure 1 As shown, the pull rod device includes a long rod 12 with one end connected to the window frame or hinge, a fixed rod 11 fixed to the sash frame, and a sliding block 13 installed in the slide rail 111 of the fixed rod 11. The long rod 12 is also connected to the sliding block 13. When the window sash is tilted inward, the long rod 12 pulls the sliding block 13 to slide in the slide rail 111.

[0003] Then, since there is a certain impact force when the window sash tilts inward, when the impact force is large, the sliding block 13 in the above-mentioned pull rod device is at risk of being pulled out from the slide rail 111, thereby affecting the use of the inward-opening and tilting window. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a new pull rod device to solve the problem that the pull rod of the above-mentioned inward opening and tilting window has the risk of being pulled out of the sliding groove.

[0005] The utility model solves the above technical problems by providing a pull rod device for use in a tilt-and-turn window. The pull rod device includes a sash fixing rod, a first pull rod, a second pull rod, and a slider assembly.

[0006] The fan fixing rod has a first sliding groove, a second sliding groove and a strip-shaped hole respectively arranged along a first direction, the first sliding groove is located on the lower surface of the fan fixing rod and is used for the locking rod to pass through, the second sliding groove is located on the bottom wall of the first sliding groove, the strip-shaped hole extends from the bottom wall of the second sliding groove to the upper surface of the fan fixing rod, and the length of the strip-shaped hole and the second sliding groove is less than the length of the first sliding groove; the first direction is the length direction of the fan fixing rod;

[0007] The slider assembly is slidably installed in the second sliding groove by the bottom of the fan fixing rod, the length of the first pull rod is greater than the length of the second pull rod, and the first end of the first pull rod is hinged to the window frame, the second end of the first pull rod is hinged to the slider assembly through a pin shaft passing through the strip hole, the first end of the second pull rod is hinged to the fan fixing rod, the second end of the second pull rod is hinged between the first end and the second end of the first pull rod, and when the second end of the first pull rod rotates relative to the fan fixing rod, the second pull rod rotates respectively relative to the first pull rod and the fan fixing rod, and the slider assembly slides in the second sliding groove.

[0008] As a further improvement of the present invention, the second slide groove has multiple first limiting structures distributed along the first direction, and the slider assembly includes a second limiting structure corresponding to the first limiting structure. The second limiting structure is locked with the first limiting structure during the reverse sliding process of the slider assembly, and when the second limiting structure is locked with the first limiting structure, the slider assembly is prevented from sliding forward.

[0009] As a further improvement of the present invention, multiple first limiting structures are respectively composed of multiple card slots on the side walls of the second slide groove; the second limiting structure is composed of an elastic protrusion, and when the elastic protrusion is embedded in the card slot, the first limiting structure and the second limiting structure are locked.

[0010] As a further improvement of the present invention, the slider assembly includes a first slider, a second slider and an elastic member; the first slider is hinged to the second end of the first pull rod, and an assembly groove is formed on the upper surface of the first slider; the second slider and the elastic member are both slidably installed in the assembly groove of the first slider, and the outer edge of the second slider has a convex portion corresponding to the card slot; the elastic member is located between the first slider and the second slider, and pushes the second slider to embed the convex portion into the card slot during the reverse sliding process of the slider assembly.

[0011] As a further improvement of the present invention, a first claw is provided in the assembly groove, and a second claw is provided on the side of the second slider facing away from the convex portion; the first claw and the second claw are locked when the second slider follows the first slider to slide forward, and are separated when the second slider follows the first slider to slide reversely, and when the first claw and the second claw are locked, the convex portion on the second slider is retracted into the assembly groove, and when the first claw and the second claw are separated, the second slider is pushed by the elastic member to make the convex portion abut against the side wall of the second sliding groove or embed into the card groove.

[0012] As a further improvement of the present invention, the second slider includes a first straight line segment and a second straight line segment respectively in the shape of a strip, and the first straight line segment and the second straight line segment are connected at an angle of 150°-175°; the convex portion is located at the connection between the first straight line segment and the second straight line segment and faces away from the elastic member, and the second claw portion is located on the second straight line segment and faces away from the convex portion; the elastic member abuts against the first straight line segment.

[0013] As a further improvement of the present invention, the assembly groove includes a recess adapted to the free end of the first straight segment; when the second slider follows the first slider in sliding forward, the free end of the first straight segment is embedded in the recess, and when the free end of the first straight segment is embedded in the recess, the second claw is separated from the first claw; when the second slider follows the first slider in sliding reversely, the free end of the first straight segment leaves the recess, and when the free end of the first straight segment leaves the recess, the second claw is locked with the first claw.

[0014] As a further improvement of the present invention, a stop block is provided in the second slide groove, and when the free end of the second straight segment of the second slider following the sliding of the first slider hits the stop block, the stop block pushes the second slider to move relative to the first slider until the free end of the second slider is embedded in the recess.

[0015] As a further improvement of the present invention, the convex portion of the second slider includes a back-facing vertical surface and a first inclined surface, the vertical surface is perpendicular to the second straight segment and faces back to the first straight segment, and when the second slider slides forward, the slot prevents the slider assembly from continuing to slide by cooperating with the vertical surface, and when the second slider slides reversely, the slot pushes the first inclined surface to make the convex portion leave the slot.

[0016] As a further improvement of the present invention, the assembly groove has a second inclined surface corresponding to the outer edge of the first straight segment, and when the second slider follows the first slider to slide in the opposite direction until the first straight segment and the second inclined surface are against each other, the second inclined surface pushes the first straight segment, causing the second slider to move relative to the second slider until the free end recess of the first straight segment exits.

[0017] The utility model has the following beneficial effects: by installing the slider assembly to the second slide groove at the bottom of the sash fixing rod, and hingedly connecting the slider assembly with the first pull rod via a pivot passing through the strip hole, the risk of the slider assembly falling out of the second slide groove when the window sash is opened upside down is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of the partial structure of a pull rod assembly in an existing inward-opening and tilting window.

[0019] Figure 2 It is a schematic diagram of the exploded structure of the pull rod structure provided by an embodiment of the present utility model.

[0020] Figure 3 The utility model is a schematic diagram of the exploded structure of the sash fixing rod and the slider assembly in the pull rod device for the inward opening and tilting window provided by the embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the assembly of the slider assembly into the second slide groove in the pull rod device for the inward opening and tilting window provided by an embodiment of the present invention.

[0022] Figure Numbers

[0023] 11 Fixing rod 111 Slide rail

[0024] 12 long rod 13 sliding block

[0025] 21 Window frame connection assembly 22 Lock rod

[0026] 23 fan fixing rod 231 first slide slot

[0027] 232 Second chute 233 Strip hole

[0028] 234 slot 235 stopper

[0029] 237 Second inclined surface 24 First pull rod

[0030] 25 Second pull rod 26 Slider assembly

[0031] 261 first slider 2611 assembly groove

[0032] 2612 First claw part 2613 Recessed part

[0033] 262 second slider 2621 convex portion

[0034] 2622 second claw 2623 first straight line segment

[0035] 2624 second straight line segment 263 elastic member

[0036] 264 pin DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] like Figure 2-4The figure shows a schematic diagram of the structure of the pull rod device of the present invention, which can be applied to inward-opening and tilting windows and is connected to the sash frame and the window frame respectively to limit the inward-tilting opening distance of the window sash. The pull rod device of this embodiment includes a sash fixing rod 23, a first pull rod 24, a second pull rod 25 and a slider assembly 26, wherein the sash fixing rod 23 is assembled to the sash frame, and the slider assembly 26 is slidably assembled to the sash fixing rod 23. The two ends of the first pull rod 24 are respectively hinged to the window frame connection assembly 21 (the window frame connection assembly 21 can specifically include a frame fixing rod fixed to the window frame, a plurality of connecting rods respectively hinged to the frame fixing rod, etc.) and the slider assembly 26. When the window sash is tilted inward, the first pull rod 24 rotates relative to the window frame and the sash frame respectively, and pulls the sash frame to prevent the sash frame from opening too large an angle or falling off. The above-mentioned sash fixing rod 23, the first pull rod 24, the second pull rod 25 and the slider assembly 26 can all be made of hard materials such as metal.

[0039] The sash fixing rod 23 is fixed to the vertical portion of the sash frame profile. The sash fixing rod 23 has a first slot 231, a second slot 232, and a strip hole 233. The first slot 231, the second slot 232, and the strip hole 233 are respectively arranged along a first direction (i.e., the length direction of the sash fixing rod 23). The first slot 231 is located on the lower surface of the sash fixing rod 23 and is used for the locking rod 22 (which is connected to the handle transmission) to pass through. The second slot 232 is located at the bottom wall of the first slot 231. The strip hole 233 extends from the bottom wall of the second slot 232 to the upper surface of the sash fixing rod 23. The length of the strip hole 233 and the second slot 232 is shorter than that of the first slot 231. The length of the strip hole 233 and the second slot 232 corresponds to the maximum inward tilting opening distance of the window sash. The greater the inward tilting opening distance of the sash frame, the longer the length of the strip hole 233 and the second slot 232.

[0040] The slider assembly 26 is slidably mounted at the bottom of the sash fixing rod 23 into the second slide groove 232 (i.e., the slider assembly 26 can slide in the first direction within the second slide groove 232). The first pull rod 24 is longer than the second pull rod 25. The first end of the first pull rod 24 is hinged to the window frame connecting assembly 21, and the second end is hinged to the slider assembly 26 in the second slide groove 232 via a pin 264 (e.g., a rivet) passing through the strip-shaped hole 233. The first end of the second pull rod 25 is hinged to the sash fixing rod 23, and the second end is hinged between the first and second ends of the first pull rod 24. When the window sash is pushed to tilt inward to open, the slider assembly 26 slides forward in the second chute 232, and at the same time, the angle between the first pull rod 24 and the sash fixing rod 23 increases, and the angle between the second pull rod 25 and the first pull rod 24 and the sash fixing rod 23 also increases. When the window sash is pushed to tilt inward to close, the slider assembly 26 slides backward in the second chute 232, and at the same time, the angle between the first pull rod 24 and the sash fixing rod 23 decreases, and the angle between the second pull rod 25 and the first pull rod 24 and the sash fixing rod 23 also decreases. That is, when the slider assembly 26 slides forward in the second chute 232, the angle between the first pull rod 24 and the sash fixing rod 23 increases; when the slider assembly 26 slides backward in the second chute 232, the angle between the first pull rod 24 and the sash fixing rod 23 decreases.

[0041] In the above-mentioned pull rod device, since the first pull rod 24 is hinged to the slider assembly 26 through the pin shaft 264 passing through the bar hole 233, the risk of the slider assembly 40 escaping from the second sliding groove 232 when the window sash is tilted inward is avoided, thereby improving the reliability of the inward tilting and opening of the window sash.

[0042] In one embodiment of the present invention, the second chute 232 has a plurality of first limiting structures distributed along the first direction, and accordingly, the slider assembly 26 includes a second limiting structure corresponding to the first limiting structure. When the slider assembly slides in the reverse direction in the second chute (i.e., the window sash is tilted inward and closed), the second limiting structure prevents the slider assembly 26 from sliding forward along the sash fixing rod 23 by locking with the first limiting structure, thereby preventing the window sash from tilting inward and opening (i.e., increasing the tilting opening distance), thereby achieving the tilting opening angle positioning of the window sash. Moreover, when the first limiting structure and the second limiting structure are locked, the first limiting structure does not prevent the slider assembly 26 from sliding in the reverse direction in the second chute 232, i.e., the window sash can still be tilted inward and closed until the window sash is completely closed.

[0043] By providing a plurality of first limiting structures arranged along the first direction within the second chute 232 and cooperating with the second limiting structures on the slider assembly 26, the inward-opening tilt window can be positioned at a plurality of different inward-tilting distances to meet different ventilation requirements. Specifically, the position and number of the first limiting structures can be designed based on the inward-tilting opening distance of the window sash.

[0044] In one embodiment of the present invention, the plurality of first limiting structures in the second chute 232 are respectively constituted by a plurality of slots 234 on the side walls of the second chute 232. In particular, the slots 234 can be arranged along a second direction (the second direction is perpendicular to the bottom wall of the second chute 232). The second limiting structure is constituted by an elastic protrusion, and when the elastic protrusion is embedded in the slot 234, the first limiting structure and the second limiting structure are locked. During the reverse sliding of the slider assembly 26 in the second chute 232 (i.e., the window sash is tilted inward and closed), the elastic protrusion is embedded in the slot 234 on the side wall of the second chute 232, and the slider assembly 26 cannot slide forward in the second chute 232, thereby preventing the window sash from tilting inward and opening.

[0045] Specifically, the slider assembly 26 includes a first slider 261, a second slider 262, and an elastic member 263. The first slider 261 is hingedly connected to the second end of the first pull rod 24 via a pivot 264 that passes through the strip-shaped hole 233. A mounting groove 2611 is formed on the upper surface of the first slider 261. The second slider 262 and the elastic member 263 are both slidably mounted in the mounting groove 2611 of the first slider 261. The outer edge of the second slider 262 has a protrusion 2621 corresponding to the slot 234. The elastic member 263 is located between the first slider 261 and the second slider 262. That is, the two sides of the elastic member 263 respectively abut the first slider 261 and the second slider 262. When the slider assembly 26 slides in the opposite direction, it pushes the second slider 262, causing the protrusion 2621 to engage the slot. In other words, the elastic protrusion of the slider assembly 26 is composed of the second slider 262 and the elastic member 263. Of course, in actual applications, the elastic protrusion can also be composed of other existing structures. The elastic member 263 may be a leaf spring.

[0046] like Figure 3As shown, in one embodiment of the present invention, a first claw portion 2612 is provided within the assembly groove 2611. Accordingly, a second claw portion 2622 is provided on the side of the second slider 262 facing away from the protrusion 2621. The first claw portion 2612 and the second claw portion 2622 interlock when the second slider 262 follows the first slider 261 in a forward sliding motion, and separate when the second slider 262 follows the first slider 261 in a reverse sliding motion. When the first claw portion 2612 and the second claw portion 2622 interlock, the protrusion 2621 on the second slider 262 retracts into the assembly groove 2611. When the first claw portion 2612 and the second claw portion 2622 separate, the second slider 262, pushed by the elastic member 263, causes the protrusion 2621 to abut against the sidewall of the second slide groove 232 or to engage with the latching groove 234. When the slider assembly 26 slides forward, the first claw 2612 and the second claw 2622 can be locked together, so that the protrusion 2621 can be retracted into the assembly groove 2611 and cannot be embedded in the groove 234 of the side wall of the second slide groove 232, thereby ensuring that the window sash can be opened inward smoothly; and when the slider assembly 26 slides backward, the first claw 2612 and the second claw 2622 can be separated, so that the protrusion 2621 protrudes outside the edge of the assembly groove 2611 and is embedded in the groove 234 when passing through the groove 234 of the side wall of the second slide groove 232, thereby realizing the inward opening positioning of the window sash.

[0047] In one embodiment of the present invention, the second slider 262 includes a first straight segment 2623 and a second straight segment 2624, each of which is strip-shaped. The first straight segment 2623 and the second straight segment 2624 are connected at an angle of 150°-175°. The protrusion 2621 is located at the junction of the first straight segment 2623 and the second straight segment 2624, facing away from the elastic member 263. The second claw 2622 is located on the second straight segment 2624, facing away from the protrusion 2621. When the second slider 262 is assembled to the first slider 261, the first straight segment 2623 is tilted away from the protrusion 2621, and the elastic member 263 abuts against the first straight segment 2623. The contact surface between the first straight segment 2623 and the elastic member 263 is not parallel to the longitudinal direction of the fan fixing rod 23. For example, the contact surface forms an angle of 10-40° with the longitudinal direction of the fan fixing rod 23. This allows the elastic member 43 to slide synchronously with the second slider 262.

[0048] During movement, the second slider 262 not only moves in the first direction, but also at least a portion thereof moves in a third direction (the third direction being perpendicular to the length direction of the fan fixing rod 23). Specifically, when the second slider 262 follows the movement of the first slider 261 (i.e., the second slider 262 is stationary relative to the first slider 261), its movement direction is the length direction of the fan fixing rod 23. When the second slider 262 slides relative to the first slider 261, the movement direction of the free end of the first straight segment 2623 is the second direction, i.e., the second slider 262 exhibits a "swinging" motion. This "swinging" motion allows the protrusion 2621 on the second slider 262 to protrude from or retract into the side of the first slider 261.

[0049] Combine Figure 3 、 Figure 4 As shown, in one embodiment of the present invention, the assembly groove 2611 of the first slider 261 includes a recess 2613 that mates with the free end of the first straight segment 2623. When the second slider 262 slides forward following the first slider 261, the leading end of the second slider 262 engages with the recess 2613, the first claw 2612 separates from the second claw 2622, and the protrusion 2621 protrudes beyond the edge of the first slider 261. When the second slider 262 slides backward following the first slider 261, the leading end of the second slider 262 leaves the recess 2613, the first claw 2612 locks with the second claw 2622, and the protrusion 2621 retracts into the edge of the first slider 261.

[0050] In addition, if Figure 4 As shown, the second slide groove 232 has a stopper 235 therein. When the second slider 262 slides following the first slider 261 until the free end of the second straight segment 2624 abuts the stopper 235, the stopper 235 pushes the second slider 262, causing it to move relative to the first slider 261, until the free end of the first straight segment 2623 engages with the recess 2613. The stopper 235 allows the second slider 262 to smoothly engage with the recess 2613 of the assembly groove 2611 at the end of its forward travel, thereby allowing the protrusion 2621 to protrude beyond the edge of the first slider 261. Specifically, the first end of the first straight segment 2623 may have a circular arc surface to facilitate its engagement with the recess 2613.

[0051] In one embodiment of the present invention, the protrusion 2621 of the second slider 262 includes a back-facing vertical surface and a first inclined surface, wherein the vertical surface is perpendicular to the second straight segment 2624 and faces away from the first straight segment 2623 (i.e., toward the forward sliding direction of the slider assembly 26). When the protrusion 2621 is inserted into the slot 234, the slot 234 cooperates with the vertical surface to prevent the slider assembly 26 from sliding forward (for example, the slot 234 includes two side walls that are respectively perpendicular to the first direction, and the vertical surface is also perpendicular to the first direction. In this way, when the vertical surface abuts the side walls of the slot 234, the second slider 262 cannot slide forward, and thus the first slider 261 cannot slide forward). Of course, in actual applications, other structures can also be used to prevent the second slider 262 from sliding forward when the protrusion 2621 is inserted into the slot 234. Furthermore, when the protrusion 2621 is inserted into the slot 234 and the second slider 262 slides in the opposite direction, the edge of the slot 234 pushes the first inclined surface, causing the second slider 42 to move away from the slot 234 (compressing the elastic member 263 at the same time), thereby causing the protrusion 2621 to exit the slot 234. Of course, in actual applications, an inclined surface can also be provided on the slot 234 to push the second slider 262.

[0052] In one embodiment of the present invention, the assembly groove 2611 has a second inclined surface 237 corresponding to the outer edge of the first straight segment 2623. For example, the second inclined surface 237 can be located on the side wall of the second sliding groove 232 where the card slot 234 is located, and when the second slider 262 follows the first slider 261 and slides in the opposite direction until the first straight segment 2623 and the second inclined surface 237 are against each other, the second inclined surface 237 pushes the first straight segment 2623, causing the second slider 262 to move relative to the first slider 261. At the same time, the second straight segment 2624 swings in the direction away from the side wall where the card slot 234 is located until the free end of the first straight segment 2623 exits the recess 2613, and the first claw 2612 is locked with the second claw 2622.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A pull rod device, used for inward opening and tilting windows, characterized in that: The pull rod device includes a fan fixing rod, a first pull rod, a second pull rod and a slider assembly; The fan fixing rod has a first sliding groove, a second sliding groove and a strip-shaped hole respectively arranged along a first direction, the first sliding groove is located on the lower surface of the fan fixing rod and is used for the locking rod to pass through, the second sliding groove is located on the bottom wall of the first sliding groove, the strip-shaped hole extends from the bottom wall of the second sliding groove to the upper surface of the fan fixing rod, and the length of the strip-shaped hole and the second sliding groove is less than the length of the first sliding groove; the first direction is the length direction of the fan fixing rod; The slider assembly is slidably installed in the second sliding groove by the bottom of the fan fixing rod, the length of the first pull rod is greater than the length of the second pull rod, and the first end of the first pull rod is hinged to the window frame, the second end of the first pull rod is hinged to the slider assembly through a pin shaft passing through the strip hole, the first end of the second pull rod is hinged to the fan fixing rod, the second end of the second pull rod is hinged between the first end and the second end of the first pull rod, and when the second end of the first pull rod rotates relative to the fan fixing rod, the second pull rod rotates respectively relative to the first pull rod and the fan fixing rod, and the slider assembly slides in the second sliding groove.

2. The pull rod device according to claim 1, characterized in that: The second slide groove has multiple first limiting structures distributed along the first direction, and the slider assembly includes a second limiting structure corresponding to the first limiting structure. The second limiting structure is locked with the first limiting structure during the reverse sliding process of the slider assembly, and when the second limiting structure is locked with the first limiting structure, the slider assembly is prevented from sliding forward.

3. The pull rod device according to claim 2, characterized in that: The plurality of first limiting structures are respectively formed by a plurality of slots on the side walls of the second sliding groove; the second limiting structure is formed by an elastic protrusion, and when the elastic protrusion is embedded in the slot, the first limiting structure and the second limiting structure are locked.

4. The pull rod device according to claim 3, characterized in that: The slider assembly includes a first slider, a second slider and an elastic member; the first slider is hinged to the second end of the first pull rod, and an assembly groove is formed on the upper surface of the first slider; the second slider and the elastic member are both slidably mounted in the assembly groove of the first slider, and the outer edge of the second slider has a convex portion corresponding to the slot; the elastic member is located between the first slider and the second slider, and pushes the second slider to embed the convex portion into the slot during the reverse sliding process of the slider assembly.

5. The pull rod device according to claim 4, characterized in that: The assembly groove is provided with a first claw portion, and the second slider is provided with a second claw portion on a side facing away from the convex portion; the first claw portion and the second claw portion are locked when the second slider follows the first slider to slide forward, and are separated when the second slider follows the first slider to slide reversely, and when the first claw portion and the second claw portion are locked, the convex portion on the second slider is retracted into the assembly groove, and when the first claw portion and the second claw portion are separated, the second slider is pushed by the elastic member to make the convex portion abut against the side wall of the second sliding groove or embed into the slot.

6. The pull rod device according to claim 5, characterized in that: The second slider includes a first straight segment and a second straight segment, each of which is in the shape of a strip, and the first straight segment and the second straight segment are connected at an angle of 150°-175°; the convex portion is located at the connection between the first straight segment and the second straight segment and faces away from the elastic member, and the second claw portion is located on the second straight segment and faces away from the convex portion; the elastic member abuts against the first straight segment.

7. The pull rod device according to claim 6, characterized in that: The assembly groove includes a recessed portion adapted to the free end of the first straight segment; when the second slider follows the first slider in sliding forward, the free end of the first straight segment is embedded in the recessed portion, and when the free end of the first straight segment is embedded in the recessed portion, the second claw is separated from the first claw; when the second slider follows the first slider in sliding reversely, the free end of the first straight segment leaves the recessed portion, and when the free end of the first straight segment leaves the recessed portion, the second claw is locked with the first claw.

8. The pull rod device according to claim 7, characterized in that: There is a stopper in the second sliding groove, and when the second slider follows the first slider to slide to the free end of the second straight segment and abuts against the stopper, the stopper pushes the second slider to move relative to the first slider until the free end of the second slider is embedded in the recess.

9. The pull rod device according to claim 8, characterized in that: The convex portion of the second slider includes a back-facing vertical surface and a first inclined surface, wherein the vertical surface is perpendicular to the second straight segment and faces away from the first straight segment, and when the second slider slides in the forward direction, the slot cooperates with the vertical surface to prevent the slider assembly from continuing to slide, and when the second slider slides in the reverse direction, the slot pushes the first inclined surface to cause the convex portion to leave the slot.

10. The pull rod device according to claim 9, characterized in that: The assembly groove has a second inclined surface corresponding to the outer edge of the first straight segment, and when the second slider follows the first slider and slides in the opposite direction until the first straight segment and the second inclined surface abut against each other, the second inclined surface pushes the first straight segment, causing the second slider to move relative to the second slider until the free end recess of the first straight segment exits.

Images