Adjustable square rod and door lock

Abstract

The invention belongs to the technical field of locks, and particularly discloses an adjustable square rod and a door lock. Wherein the adjustable square rod comprises a front square rod, a rear square rod, an adjusting rod, an elastic piece and a positioning piece; a through hole is formed in the front square rod; the rear rod is provided with a main body section and an insertion section, and the insertion section extends in the front-back direction and extends into the through hole; the insertion section or the main body section is provided with a sliding groove in the front-back direction. The adjusting rod is in sliding connection with the sliding groove, and the adjusting rod and the rear rod coaxially rotate; one end of the elastic piece abuts against the front end of the adjusting rod, and the other end of the elastic piece abuts against the insertion section; the positioning piece is arranged on the outer side of the front square rod; the positioning piece is used for positioning a lock body of the door lock, so that the front rod and the rear rod are in positioning connection with the lock body of the door lock, the positions of the front rod and the rear rod can be fixed, the front handle is connected with the adjustable square rod, a spring does not need to be positioned and mounted at the front handle or the rear handle, mounting steps are reduced, and the door lock is more convenient and faster to mount; the mounting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to an adjustable square rod and a door lock. Background Art

[0002] Door locks generally have a front handle and a rear handle. When an electronic lock body is used, the emergency lock is mostly set on the front handle so that the lock can be unlocked through the emergency lock and the clutch mechanism. Since the emergency lock is set on the front handle, the length of the square rod needs to be adapted to the distance between the front handle and the rear handle. Therefore, square rods with adjustable lengths are available on the market so that door locks can be installed on doors of various thicknesses. However, most of the square rods with adjustable lengths on the market have a relatively complex structure. A spring needs to be installed on the length adjustment structure so that the length of the square rod can be adjusted by the spring so that the square rod can abut against the front handle and the rear handle. During installation, it is also necessary to additionally position and install a spring on the front handle or the rear handle so that the square rod is connected to the front handle. This requires high installation skills of the installer. During on-site installation, it is easy for the square rod to be misplaced or the spring to be missed, resulting in low door lock installation efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide an adjustable square rod and a door lock to solve the technical problems in the prior art that the door lock is difficult to install, the installation steps are complicated, and the installation efficiency is low.

[0004] In order to achieve the above-mentioned object, the first aspect of the present invention provides an adjustable square rod for connecting a front handle and a rear handle, which comprises:

[0005] A front rod, which is used to connect with the front handle; the front rod is provided with a through hole extending forward and backward, and a first limiting step facing the front is provided in the through hole;

[0006] A rear rod, which is used to connect with the rear handle; the rear rod has a main section and an insertion section, the insertion section extends along the front-back direction and extends into the through hole, and the outer side of the insertion section is provided with a second limiting step for cooperating with the first limiting step; the insertion section can rotate relative to the front rod; the insertion section or the main section is provided with a sliding groove running forward and backward;

[0007] An adjusting rod is slidably connected to the slide groove, and the adjusting rod rotates coaxially with the rear rod; the front end of the adjusting rod extends to the front side of the through hole;

[0008] An elastic member, one end of which abuts against the front end of the adjusting rod, and the other end of which abuts against the inserting section; the elastic member is used to drive the adjusting rod to extend forward.

[0009] Preferably, the slide groove is arranged on the insertion section, and the slide groove is located in the through hole.

[0010] Preferably, the insertion section is provided with a limiting groove extending in a front-to-rear direction in the length direction, the limiting groove is communicated with the sliding groove, and the adjusting rod is provided with a first limiting member for inserting into the limiting groove.

[0011] Preferably, the adjusting rod is provided with a first mounting hole for mounting the first limiting member.

[0012] Preferably, there are two limiting grooves, and the two limiting grooves are respectively arranged on both sides of the sliding groove.

[0013] Preferably, a contact portion is provided at the front end of the adjusting rod, and a rear side surface of the contact portion contacts the elastic member.

[0014] Preferably, a transmission part for cooperating with the front handle for transmission is provided on the front side surface of the front end of the adjusting rod.

[0015] Preferably, it further comprises: a positioning member; the positioning member is arranged on the outer side of the front rod; a mounting groove is arranged on the outer side of the front rod, and the positioning member is arranged at the mounting groove.

[0016] Preferably, the positioning member is a retaining spring.

[0017] Preferably, the rear end of the insertion section is a connecting end, and the connecting end is detachably connected to the main body section.

[0018] Preferably, it also includes a second limiting member; the main body section is provided with a connecting hole, the connecting end is inserted into the connecting hole, the main body section is provided with a positioning hole connected to the connecting hole, and the connecting end is provided with a second mounting hole; the second limiting member is inserted into the second mounting hole and the positioning hole to position and connect the connecting end to the main body section.

[0019] Preferably, the elastic member is a compression spring, and the compression spring is sleeved on the outside of the adjusting rod.

[0020] The second aspect of the present invention provides a door lock, which includes: a front handle, a rear handle, a lock body, a lock head and an adjustable square rod as described above, wherein the front handle is connected to the front rod, the rear handle is connected to the main body section, the lock head is arranged on the front handle, and the lock head has a telescopic block, the telescopic block is located on the front side of the adjusting rod and the telescopic block abuts against the adjusting rod, the lock body has a clutch fork and a square rod hole arranged on the clutch fork; the positioning piece abuts against the front side of the lock body, the main body section is located in the square rod hole and is transmission connected to the clutch fork; when the lock head drives the telescopic block to extend or retract, the adjusting rod is transmission connected to the front handle.

[0021] Preferably, after the lock drives the telescopic block to retract, the adjustment rod is connected to the front handle in a transmission manner.

[0022] Preferably, the front side surface of the front end of the adjusting rod is provided with a transmission part for abutting against the telescopic block, and the front handle is provided with a transmission groove for transmission connection with the transmission part; retraction of the telescopic block can make the transmission part extend into the transmission groove, so that the front handle is transmission connected with the adjusting rod.

[0023] Preferably, the transmission portion is in an I-shape, and the transmission groove is in a X-shape.

[0024] Preferably, the clutch fork comprises a rotating shift block, a clutch, and a clutch rotor; the clutch is used to engage the rotating shift block and the clutch rotor or disconnect the rotating shift block and the clutch rotor; the square rod hole is arranged on the rotating shift block, and the clutch rotor is transmission-connected to the front rod.

[0025] The adjustable square rod and door lock provided by the present invention have the following beneficial effects: when the adjustable square rod is installed on the door lock, the positioning piece is used to position the lock body of the door lock, so that the front rod and the rear rod are positioned and connected to the lock body of the door lock, and the positions of the front rod and the rear rod can be fixed, so that the front handle and the adjustable square rod are connected, ensuring that the front handle and the square rod are accurately installed, and there is no need to position and install the spring at the front handle or the rear handle, which reduces the installation steps and greatly reduces the difficulty of installation, making the door lock installation more convenient and quick, and the installers will not encounter installation misalignment or spring omission during on-site installation, thereby improving the installation efficiency.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of an adjustable square rod according to an embodiment of the present invention;

[0028] Figure 2 is a schematic cross-sectional structure diagram of an adjustable square rod according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the structure of the adjustable square rod after being decomposed according to an embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of the rear rod and the adjustment rod after being assembled in an embodiment of the present invention;

[0031] Figure 5 is a schematic cross-sectional structure diagram of the rear rod and the adjustment rod after being assembled in an embodiment of the present invention;

[0032] Figure 6 1 is a schematic diagram of the structure of the state when the telescopic block of the lock head of the door lock according to the embodiment of the present invention is retracted;

[0033] Figure 7 is a schematic structural diagram of a door lock according to an embodiment of the present invention when it is in a locked state;

[0034] Figure 8 It is a schematic structural diagram of a door lock according to an embodiment of the present invention when the clutch is in an engaged state.

[0035] In the figure, 100, front rod; 110, through hole; 111, first limiting step; 120, mounting groove; 200, rear rod; 210, main section; 211, connecting hole; 212, positioning hole; 220, insertion section; 221, second limiting step; 222, limiting groove; 223, connecting end; 224, second mounting hole; 230, slide groove; 300, adjusting rod; 310, first limiting member; 320, first mounting hole; 330, abutting portion; 340, transmission portion; 400, elastic member; 500, positioning member; 600, second limiting member;

[0036] 10. Front handle; 11. Transmission slot; 20. Rear handle; 30. Lock body; 31. Clutch fork; 32. Square rod hole; 33. Rotating shift block; 34. Clutch pin; 35. Clutch rotor; 40. Lock head; 41. Telescopic block. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Please also read Figures 1 to 8 Now, the adjustable square rod provided by the embodiment of the present invention is described. The adjustable square rod is applied to a door lock, which can be applied to a mechanical door lock or an electronic door lock.

[0042] like Figures 1 to 5 As shown, the adjustable square rod of the embodiment of the present invention is used to connect the front handle 10 and the rear handle 20, which includes: a front rod 100, a rear rod 200, an adjustment rod 300, an elastic member 400, and a positioning member 500;

[0043] Reference Figure 2 and Figure 3 The front rod 100 is used to connect with the front handle 10; the front rod 100 rotates coaxially with the front handle 10, and the front handle 10 rotates to drive the front rod 100 to rotate; the front rod 100 is provided with a through hole 110 extending forward and backward;

[0044] Reference Figure 2 and Figure 3 , the rear rod 200 is used to be connected with the rear handle 20; the rear rod 200 rotates coaxially with the rear handle 20, and the rear handle 20 rotates to drive the rear rod 200 to rotate; the rear rod 200 has a main section 210 and an insertion section 220, the main section 210 and the insertion section 220 rotate coaxially, the insertion section 220 extends along the front and rear direction and extends into the through hole 110; the insertion section 220 can rotate relative to the front rod 100; that is, the insertion section 220 can rotate relative to the front rod 100, and can also rotate coaxially with the front rod 100 when the lock head 40 of the front handle 10 is unlocked; in this embodiment, the main section 210 is connected to the rear handle 20. In addition, in other embodiments, the insertion section 220 can be connected to the rear handle 20 by adopting a screw connection, such as the rear end of the insertion section 220 is connected to the rear handle 20 by a screw, or the main section 210 and the insertion section 220 can be connected to the rear handle 20.

[0045] Reference Figure 2 and Figure 3, the insertion section 220 is provided with a slide groove 230 extending forward and backward; the adjustment rod 300 is slidably connected to the slide groove 230, and the adjustment rod 300 rotates coaxially with the rear rod 200; the front end of the adjustment rod 300 extends to the front side of the through hole 110; the adjustment rod 300 can slide forward and backward along the slide groove 230, and the front end of the adjustment rod 300 can move forward and backward to cooperate with the lock head 40 of the front handle 10 to perform an unlocking action. In addition, the main section 210 can also be provided with a slide groove, which is provided on the main section, and the corresponding insertion section is provided with a through groove connected to the slide groove, one end of the adjustment rod is slidably connected to the slide groove, and the adjustment rod extends from the through groove to the front side of the through hole 110, so that the adjustment rod can be extended and retracted back and forth in the forward and backward directions.

[0046] Reference Figure 2 and Figure 3 , one end of the elastic member 400 abuts against the front end of the adjusting rod 300, and the other end abuts against the inserting section 220; the elastic member 400 is used to drive the adjusting rod 300 to extend forward; the elastic member 400 provides an elastic force to stretch outward, so that the front end of the adjusting rod 300 has a tendency to move forward, ensuring that the front end of the adjusting rod 300 can move forward, so that the front end of the adjusting rod 300 abuts against the lock head 40 of the front handle 10, so as to perform the unlocking action. The adjusting rod 300 can move forward and backward along the slide groove 230, so that the length of the entire adjustable square rod in the front and rear direction can be adjusted to adapt to door bodies of different thicknesses.

[0047] Reference Figure 2 and Figure 3 , the positioning member 500 is arranged on the outer side of the front rod 100; wherein the through hole 110 is provided with a first limiting step 111 facing the front side, and the outer side of the insertion section 220 is provided with a second limiting step 221 for cooperating with the first limiting step 111, when the insertion section 220 moves backward, it can drive the front rod 100 to move backward together, so that the relative position between the front rod 100 and the rear rod 200 will not change.

[0048] Reference Figures 6 to 8The specific door lock installation process is as follows: install the lock body 30 of the door lock on the door body, then extend the adjustable square rod from front to back into the square rod hole 32 of the lock body 30 of the door lock until the positioning member 500 abuts against the door lock, and the preliminary positioning of the adjustable square rod is completed; then align the square hole of the front handle 10 with the front rod 100 and the adjusting rod 300, and install the front handle 10 on the door, and the positioning installation of the front handle 10 can be completed; wherein, since the lock head 40 of the front handle 10 abuts against the front end of the adjusting rod 300, the front handle 10 can push the front rod 100 toward the door lock through the adjusting rod 300, the elastic member 400, and the insertion section 220 to fix the positions of the front rod 100 and the rear rod 200, so that the adjustable square rod is positioned and installed between the lock body 30 and the front handle 10, and the front handle 10 is connected to the front rod 100 to ensure correct installation. Finally, align the square hole of the rear handle 20 with the rear rod 200, and then install the rear handle 20 on the door, and the entire door lock installation can be completed.

[0049] In the prior art, when installing the door lock, it is necessary to install a spring on the rear handle so that the rear rod can be pushed forward and the front rod can be connected to the front handle, so that the front handle can drive the lock body to open the door; while the adjustable square rod of the present embodiment does not require additional springs to be installed during the entire door lock installation process, nor is there any need to position and install springs at the front handle 10 and the rear handle 20. The adjustable square rod only needs to be aligned with the square rod hole 32 of the lock body 30 for smooth installation, which greatly reduces the difficulty of installation and makes the door lock installation more convenient and quick. The installer will not encounter installation misalignment or spring omission during on-site installation, thereby improving installation efficiency.

[0050] When the adjustable square rod of this embodiment is installed in the door lock, the positioning piece 500 is used to position the door lock body 30, so that the front rod 100 and the rear rod 200 are positioned and connected to the door lock body 30, and the positions of the front rod 100 and the rear rod 200 can be fixed, so that the front handle 10 and the adjustable square rod are connected, ensuring that the front handle 10 and the square rod are accurately installed, and there is no need to position and install the spring at the front handle 10 or the rear handle 20, which reduces the installation steps and greatly reduces the installation difficulty, making the door lock installation more convenient and quick. The installer will not encounter installation misalignment or spring omission during on-site installation, thereby improving the installation efficiency.

[0051] Reference Figures 3 to 5 In some embodiments of the present invention, the slide groove 230 is arranged on the insertion section 220, and the slide groove 230 is located in the through hole 110. That is, the front rod 100 can cover the slide groove 230 to prevent the slide groove 230 from being exposed, and can prevent dust or foreign objects from falling into the slide groove 230, thereby avoiding the situation where dust or foreign objects falling into the slide groove 230 affect the extension and retraction of the adjustment rod 300 and cause functional failure, thereby ensuring that the adjustable square rod can be used normally and the door lock can be used normally.

[0052] Reference Figures 3 to 5 In some embodiments of the present invention, the insertion section 220 is provided with a limiting groove 222 extending in the longitudinal direction along the front-back direction, the limiting groove 222 is communicated with the slide groove 230, and the adjustment rod 300 is provided with a first limiting member 310 for inserting into the limiting groove 222. The adjustment rod 300 is inserted into the limiting groove 222 through the first limiting member 310, so that the limiting groove 222 can limit the moving length of the adjustment rod 300, that is, the length of the limiting groove 222 is the movable length of the adjustment rod 300 in the front-back direction, so as to ensure that the adjustment rod 300 will not be disengaged from the slide groove 230, and ensure that the adjustment rod 300 is connected to the insertion section 220.

[0053] Reference Figures 3 to 5 In some embodiments of the present invention, the adjusting rod 300 is provided with a first mounting hole 320 for mounting the first stopper 310. The first stopper 310 can be directly inserted into the first mounting hole 320, so that the first stopper 310 is fixedly connected to the adjusting rod 300, ensuring that the adjusting rod 300 will not fall out of the slide groove 230.

[0054] Reference Figures 3 to 5 In this embodiment, the slide groove 230 is a round hole groove, and the corresponding adjustment rod 300 is a round rod. The adjustment rod 300 transmits the rotation torque to the insertion section 220 through the first limiter 310 and the limiter groove 222, so that the adjustment rod 300 can rotate coaxially with the insertion section 220. On the basis of the above, there are two limiter grooves 222, and the two limiter grooves 222 are respectively arranged on both sides of the slide groove 230, and the first limiter 310 is inserted into the two limiter grooves 222, so that the adjustment rod 300 can transmit the torque to the insertion section 220 through two fulcrums, so that the force is better transmitted to the insertion section 220 and the main section 210. It should be noted that after the lock head 40 of the front handle 10 is unlocked, the lock head 40 pushes the adjusting rod 300 to extend and retract, so that the front handle 10 is transmission-connected with the adjusting rod 300. At this time, by rotating the front handle 10, the rotational torque can be transmitted to the insertion section 220, and then to the rear rod 200 and the rear handle 20. Therefore, the user can rotate the front handle 10 to drive the rear handle 20 to rotate, and the rotation of the rear handle 20 can unlock the lock body 30 of the door lock, thereby achieving the purpose of opening the door.

[0055] In addition, in some other embodiments, the slide groove 230 can also be a square groove, and the corresponding adjustment rod 300 is a square rod, so that the adjustment rod 300 transmits torque to the insertion section 220 to ensure that the torque of the front handle 10 can be transmitted to the rear rod 200 and the rear handle 20.

[0056] Reference Figures 3 to 5In some embodiments of the present invention, the front end of the adjusting rod 300 is provided with an abutting portion 330, and the rear side of the abutting portion 330 abuts against the elastic member 400. The abutting portion 330 is used to abut against the elastic member 400 to ensure that the elastic member 400 can provide a forward elastic force to the adjusting rod 300, so that the front end of the adjusting rod 300 can abut against the lock head 40 of the front handle 10, so that the user can turn the lock head 40 to make the front handle 10 and the adjusting rod 300 rotatably connected.

[0057] Reference Figures 3 to 5 In some embodiments of the present invention, a transmission part 340 for cooperating with the front handle 10 for transmission is provided on the front side surface of the front end of the adjusting rod 300, and the transmission part 340 abuts against the lock head 40. When the lock head 40 drives the adjusting rod 300 to extend or retract, the transmission part 340 on the adjusting rod 300 will cooperate with the transmission structure in the front handle 10, so that the front handle 10 can drive the adjusting rod 300, the rear rod 200, and the rear handle 20 to rotate together through the transmission structure, so as to achieve the purpose of turning the front handle 10 to unlock.

[0058] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the outer side of the front rod 100 is provided with a mounting groove 120, and the positioning member 500 is arranged at the mounting groove 120. Then, the outer periphery of the front rod 100 is provided with the mounting groove 120, and the positioning member 500 is installed by using the mounting groove 120, so that the positioning member 500 is positioned and installed on the front rod 100, so as to facilitate the preliminary positioning of the adjustable square rod with the lock body 30 through the positioning member 500, and facilitate the subsequent installation of the front handle 10. Specifically, the mounting groove 120 is an annular groove, and the corresponding positioning member 500 is a retaining spring, which can be directly buckled on the mounting groove 120. After being snapped into the mounting groove 120, the outer periphery radius of the front rod 100 can be made larger so as to abut against the lock body 30, thereby achieving the purpose of positioning and installation. Moreover, the positioning member 500 cooperates with the elastic member 400, so that the front handle 10 can press the front rod 100 toward the lock body 30 through the adjusting rod 300, the elastic member 400, and the insertion section 220, so as to ensure the positioning installation of the adjustable square rod and the front handle 10, ensure the installation accuracy, and avoid the installation misalignment, so as to improve the door lock installation efficiency.

[0059] Reference Figures 3 to 5 In some embodiments of the present invention, in order to facilitate installation, the rear end of the insertion section 220 is a connection end 223, and the connection end 223 is detachably connected to the main section 210. That is, the insertion section 220 and the main section 210 are separately provided, and during installation, the insertion section 220 can be inserted into the through hole 110 from front to back, and then connected to the main section 210 by the connection end 223, so as to achieve the purpose of coordinated installation.

[0060] Reference Figures 3 to 5In some embodiments of the present invention, a second limiting member 600 is further included; the main body section 210 is provided with a connecting hole 211, the connecting end 223 is inserted into the connecting hole 211, the main body section 210 is provided with a positioning hole 212 connected to the connecting hole 211, and the connecting end 223 is provided with a second mounting hole 224; when the second mounting hole 224 is aligned with the positioning hole 212, the second limiting member 600 is inserted into the second mounting hole 224 and the positioning hole 212 to position and connect the connecting end 223 to the main body section 210. The shapes of the second mounting hole 224 and the positioning hole 212 match the shape of the second stopper 600. The second stopper 600 is a bayonet. The second stopper 600 is used to connect and fix the insertion section 220 and the main section 210, ensuring that the insertion section 220 and the main section 210 can rotate coaxially at the same time and ensure that the rotation torque can be transmitted, so that the front handle 10 can drive the rear handle 20 to rotate through the adjustment rod 300 to achieve the purpose of opening the door. In addition, the connection end 223 can also be connected to the main section 210 by a threaded connection or other connection and fastening method, which can be set according to specific circumstances.

[0061] Reference Figures 3 to 5 In some embodiments of the present invention, the elastic member 400 is a compression spring, and the compression spring is sleeved on the outside of the adjustment rod 300. The compression spring is sleeved on the outside of the adjustment rod 300 to ensure that the elastic force direction of the compression spring is in the front-to-back direction, avoid the misalignment of the elastic member 400, and ensure that the adjustable square rod can be normally extended and retracted.

[0062] Reference Figures 6 to 8 The present embodiment also provides a door lock, which includes: a front handle 10, a rear handle 20, a lock body 30, a lock head 40 and the above-mentioned adjustable square rod, wherein the front handle 10 is connected to the front rod 100, and the rear handle 20 is connected to the rear rod 200; that is, the front handle 10 is connected to the front rod 100 through a square hole, and the rear handle 20 is connected to the rear rod 200 through a square hole, so that the front handle 10 can drive the front rod 100 to rotate, and the rear handle 20 can drive the rear rod 200 to rotate; the lock head 40 is arranged on the front handle 10, and the lock head 40 has a telescopic block, which is located at the front side of the adjusting rod 300 and the telescopic block abuts against the adjusting rod 300, so that the lock head 40 can drive the telescopic block to extend and retract when unlocking, so as to drive the adjusting rod 300 to extend and retract in the front-to-back direction, so that the adjusting rod 300 is transmission-connected to the front handle 10, so that the front handle 10 can drive the rear handle 20 to rotate.

[0063] The lock body 30 has a clutch fork 31 and a square rod hole 32 arranged on the clutch fork 31; the positioning member 500 abuts against the front side of the lock body 30, and the rear rod 200 is located in the square rod hole 32 and is transmission-connected to the clutch fork 31; the rear rod 200 is connected to the square rod hole 32, and when the rear handle 20 is rotated, the clutch fork 31 can be driven to rotate to drive the lock tongue of the lock body 30 to retract, and when unlocking, the rear handle 20 can be rotated to retract the lock tongue of the lock body 30, so as to achieve the purpose of unlocking and opening the door. When the lock head 40 drives the telescopic block to extend or retract, the adjustment rod 300 is transmission-connected to the front handle 10. Refer to Figure 6 Since the adjusting rod 300 rotates coaxially with the rear rod 200, the front handle 10 can transmit torque to the rear rod 200 and the rear handle 20 through the adjusting rod 300. At this time, rotating the front handle 10 can rotate the rear handle 20, so that the rear handle 20 drives the clutch fork 31 to rotate, so that the lock tongue of the lock body 30 retracts, thereby achieving the purpose of unlocking and opening the door.

[0064] The specific door lock installation process is as follows: install the lock body 30 of the door lock on the door body, then extend the adjustable square rod from front to back into the square rod hole 32 of the lock body 30 of the door lock until the positioning member 500 abuts against the door lock, thereby completing the preliminary positioning of the adjustable square rod; then align the square hole of the front handle 10 with the front rod 100 and the adjusting rod 300, and install the front handle 10 on the door, thereby completing the positioning and installation of the front handle 10; wherein, since the lock head 40 of the front handle 10 abuts against the front end of the adjusting rod 300, the front handle 10 can push the front rod 100 toward the door lock through the adjusting rod 300, the elastic member 400, and the insertion section 220 to fix the positions of the front rod 100 and the rear rod 200, thereby making the adjustable square rod positioned and installed between the lock body 30 and the front handle 10, and the front handle 10 is connected to the square rod to ensure correct installation. Finally, align the square hole of the rear handle 20 with the rear rod 200, and then install the rear handle 20 on the door to complete the installation of the entire door lock. Therefore, during the entire door lock installation process, there is no need to install additional springs, nor is there any need to position and install springs at the front handle 10 and the rear handle 20. Only the adjustable square rod needs to be aligned with the square rod hole 32 of the lock body 30 to smoothly install it, which greatly reduces the difficulty of installation and makes the door lock installation more convenient and quick. The installer will not encounter installation misalignment or spring omission during on-site installation, thereby improving installation efficiency.

[0065] When installing the door lock of this embodiment, the positioning piece 500 of the adjustable square rod is used to position with the lock body 30 of the door lock, so that the front rod 100 and the rear rod 200 are positioned and connected with the lock body 30 of the door lock, and the positions of the front rod 100 and the rear rod 200 can be fixed, so that the front handle 10 and the adjustable square rod are connected, ensuring that the front handle 10 and the square rod are accurately installed, and there is no need to position and install the spring at the front handle 10 or the rear handle 20, which reduces the installation steps and greatly reduces the difficulty of installation, making the door lock installation more convenient and quick. The installer will not encounter installation misalignment or spring omission during on-site installation, thereby improving installation efficiency.

[0066] In some embodiments of the present invention, reference Figure 6 , when the lock 40 drives the telescopic block to retract, the adjusting rod 300 is connected in transmission with the front handle 10. Since the elastic member 400 provides a forward elastic force for the adjusting rod 300, the adjusting rod 300 can exert a forward pressure on the telescopic block. When the telescopic block of the lock 40 is retracted, the adjusting rod 300 can be displaced forward under the action of the elastic member 400, so that the adjusting rod 300 is connected in transmission with the front handle 10. At this time, the front handle 10 can be rotated to drive the rear handle 20 to rotate, so as to achieve the purpose of unlocking and opening the door. It should be noted that when the telescopic block of the lock 40 is in the extended state, the telescopic block pushes the adjusting rod 300 to disengage from the transmission structure of the front handle 10, and the adjusting rod 300 and the front rod 100 cannot transmit torque, thereby ensuring the safe use of the door lock. It can be mentioned that in the present embodiment, when the lock 40 is unlocked without inserting the key, the lock 40 is in an extended state, referring to Figure 7 and Figure 8 When the lock 40 is inserted with a key and turned to the unlocking position, the telescopic block of the lock 40 is in a retracted state. Figure 6 .

[0067] Reference Figures 5 to 7 In some embodiments of the present invention, the front side of the front end of the adjusting rod 300 is provided with a transmission part 340 for contacting with the telescopic block, and the front handle 10 is provided with a transmission groove 11 for transmission connection with the transmission part 340; when the telescopic block is retracted, the transmission part 340 extends into the transmission groove 11, so that the front handle 10 is transmission connected with the adjusting rod 300. That is, the transmission structure on the front handle 10 is the transmission groove 11, and the shape of the transmission groove 11 is adapted to the shape of the transmission part 340, so that the front handle 10 can transmit torque to the adjusting rod 300, so that the front handle 10 can drive the rear handle 20 to rotate, and ensure the normal unlocking and use of the door lock.

[0068] Reference Figures 5 to 7On the basis of the above, the transmission part 340 is in a "I" shape, and the transmission groove 11 is in a "X" shape. That is, the "I"-shaped transmission part 340 can be inserted into the "X"-shaped transmission groove 11, so that the transmission part 340 and the transmission groove 11 cooperate to transmit, so that the front handle 10 can transmit torque to the adjustment rod 300, so that the front handle 10 can drive the rear handle 20 to rotate, ensuring that the door lock is normally unlocked. In addition, the transmission part 340 can also be in a square, triangle, pentagon, hexagon and other shapes, and the transmission groove 11 can be a square groove, a triangular groove, a pentagonal groove, a hexagonal groove and other shapes that cooperate with the transmission part 340 to transmit torque.

[0069] In some embodiments of the present invention, the clutch fork 31 includes a rotating shift block 33, a clutch, and a clutch rotor 35; the clutch is used to engage the rotating shift block 33 and the clutch rotor 35 or to disconnect the rotating shift block 33 and the clutch rotor 35; the square rod hole 32 is provided on the rotating shift block 33, and the clutch rotor 35 is transmission-connected with the front rod 100. That is, the rear rod 200 can drive the rotating shift block 33 to rotate through the square rod hole 32, so as to drive the lock tongue of the lock body 30 to extend and retract. The clutch can be a clutch controlled by a motor. When the door lock is in a locked state, Figure 7 As shown in FIG. 1 , the clutch pin 34 of the clutch is not inserted into the clutch rotor 35, so that the clutch rotor 35 is disconnected from the rotating block 33. At this time, even if the front handle 10 is turned, the rotating block 33 cannot be driven to rotate. Figure 8 As shown, when unlocking is required, the motor drives the clutch pin 34 to be inserted into the clutch rotor 35 so that the clutch rotor 35 engages with the rotating block 33 to transmit torque. At this time, the front handle 10 can be rotated to drive the rotating block 33 to rotate, thereby achieving the purpose of unlocking.

[0070] like Figure 6 As shown, when the lock 40 needs to be unlocked, the key is inserted into the lock 40 and rotated to the unlocking state, the telescopic block of the lock 40 is retracted, and the transmission part 340 of the adjustment rod 300 is inserted into the transmission groove 11 of the front rod 100. At this time, the front handle 10 is connected to the rear rod 200 and the rear handle 20 through the adjustment rod 300. At this time, the front handle 10 can be rotated to drive the rear handle 20 to rotate, so as to drive the rotating block 33 to rotate, thereby achieving the purpose of unlocking and opening the door. Conversely, when the key is rotated to the locking state, the telescopic block of the lock 40 extends out, pushing the transmission part 340 to the outside of the transmission groove 11, so that the transmission part 340 is disconnected from the transmission groove 11 and cannot transmit torque, thereby achieving the purpose of locking.

[0071] The installation process of the door lock of this embodiment is as follows: the lock body 30 of the door lock is installed on the door body, and then the adjustable square rod is extended from front to back into the square rod hole 32 of the lock body 30 of the door lock until the positioning member 500 abuts against the door lock, thereby completing the preliminary positioning of the adjustable square rod; then the square hole of the front handle 10 is aligned with the front rod 100 and the adjusting rod 300, and the front handle 10 is installed on the door, thereby completing the positioning and installation of the front handle 10; wherein, since the lock head 40 of the front handle 10 abuts against the front end of the adjusting rod 300, the front handle 10 can push the front rod 100 toward the door lock through the adjusting rod 300, the elastic member 400, and the insertion section 220 to fix the positions of the front rod 100 and the rear rod 200, thereby making the adjustable square rod positioned and installed between the lock body 30 and the front handle 10, and the front handle 10 is connected to the square rod to ensure correct installation. Finally, align the square hole of the rear handle 20 with the rear rod 200, and then install the rear handle 20 on the door to complete the installation of the entire door lock. Therefore, during the entire door lock installation process, there is no need to install additional springs, nor is there any need to position and install springs at the front handle 10 and the rear handle 20. Only the adjustable square rod needs to be aligned with the square rod hole 32 of the lock body 30 to smoothly install it, which greatly reduces the difficulty of installation and makes the door lock installation more convenient and quick. The installer will not encounter installation misalignment or spring omission during on-site installation, thereby improving installation efficiency.

[0072] In summary, when the adjustable square rod of the present embodiment is installed in the door lock, the positioning member 500 is used to position the lock body 30 of the door lock, so that the front rod 100 and the rear rod 200 are positioned and connected with the lock body 30 of the door lock, and the positions of the front rod 100 and the rear rod 200 can be fixed, so that the front handle 10 is connected with the adjustable square rod, and the front handle 10 and the square rod are accurately installed. There is no need to position and install the spring at the front handle 10 or the rear handle 20, which reduces the installation steps and greatly reduces the installation difficulty, making the door lock installation more convenient and quick. The installer will not encounter the problem of installation misalignment or spring omission during on-site installation, thereby improving the installation efficiency. Moreover, the front rod 100 can cover the slide groove 230 to prevent the slide groove 230 from being exposed, and can prevent dust or foreign matter from falling into the slide groove 230, thereby avoiding the situation where dust or foreign matter falls into the slide groove 230 and affects the extension and retraction of the adjustment rod 300 and causing functional failure, thereby ensuring that the adjustable square rod can be used normally and ensuring the normal use of the door lock.

[0073] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An adjustable square rod for connecting a front handle and a rear handle, characterized in that: include: A front rod, which is used to connect with the front handle; the front rod is provided with a through hole extending forward and backward, and a first limiting step facing the front is provided in the through hole; A rear rod, which is used to connect with the rear handle; the rear rod has a main section and an insertion section, the insertion section extends along the front-back direction and extends into the through hole, and the outer side of the insertion section is provided with a second limiting step for cooperating with the first limiting step; the insertion section can rotate relative to the front rod; the insertion section or the main section is provided with a sliding groove running forward and backward; An adjusting rod is slidably connected to the slide groove, and the adjusting rod rotates coaxially with the rear rod; the front end of the adjusting rod extends to the front side of the through hole; An elastic member, one end of which abuts against the front end of the adjusting rod, and the other end of which abuts against the inserting section; the elastic member is used to drive the adjusting rod to extend forward.

2. The adjustable square rod according to claim 1, characterized in that: The slide groove is arranged on the insertion section, and the slide groove is located in the through hole.

3. The adjustable square rod according to claim 2, characterized in that: The insertion section is provided with a limiting groove extending in a front-to-rear direction in the length direction, the limiting groove is communicated with the sliding groove, and the adjusting rod is provided with a first limiting piece for inserting into the limiting groove.

4. The adjustable square rod according to claim 3, characterized in that: The adjusting rod is provided with a first mounting hole for mounting the first limiting member.

5. The adjustable square rod according to claim 3, characterized in that: There are two limiting grooves, and the two limiting grooves are respectively arranged on both sides of the sliding groove.

6. The adjustable square rod according to claim 1, characterized in that: The front end of the adjusting rod is provided with an abutting portion, and the rear side surface of the abutting portion abuts against the elastic member.

7. The adjustable square rod according to claim 1, characterized in that: The front side surface of the front end of the adjusting rod is provided with a transmission part for cooperating with the front handle for transmission.

8. The adjustable square rod according to claim 1, characterized in that: Also includes: Positioning member; the positioning member is arranged on the outside of the front rod; a mounting groove is arranged on the outside of the front rod, and the positioning member is arranged at the mounting groove.

9. The adjustable square rod according to claim 8, characterized in that: The positioning member is a clip spring.

10. The adjustable square rod according to claim 1, characterized in that: The rear end of the insertion section is a connecting end, and the connecting end is detachably connected to the main body section.

11. The adjustable square rod according to claim 10, characterized in that: It also includes a second limiting member; the main body section is provided with a connecting hole, the connecting end is inserted into the connecting hole, the main body section is provided with a positioning hole connected to the connecting hole, and the connecting end is provided with a second mounting hole; the second limiting member is inserted into the second mounting hole and the positioning hole to position and connect the connecting end to the main body section.

12. The adjustable square rod according to claim 1, characterized in that: The elastic member is a compression spring, and the compression spring is sleeved on the outside of the adjusting rod.

13. A door lock, characterized in that: include: A front handle, a rear handle, a lock body, a lock head, and an adjustable square rod as claimed in any one of claims 1 to 12, wherein the front handle is connected to the front rod, the rear handle is connected to the main body section, the lock head is arranged on the front handle, and the lock head has a telescopic block, the telescopic block is located on the front side of the adjusting rod and the telescopic block abuts against the adjusting rod, the lock body has a clutch fork and a square rod hole arranged on the clutch fork; the positioning piece abuts against the front side of the lock body, the main body section is located in the square rod hole and is transmission connected to the clutch fork; when the lock head drives the telescopic block to extend or retract, the adjusting rod is transmission connected to the front handle.

14. The door lock according to claim 13, characterized in that: After the lock drives the telescopic block to retract, the adjusting rod is connected with the front handle in a transmission manner.

15. The door lock according to claim 14, characterized in that: The front side surface of the front end of the adjusting rod is provided with a transmission part for abutting against the telescopic block, and the front handle is provided with a transmission groove for transmission connection with the transmission part; retraction of the telescopic block can make the transmission part extend into the transmission groove, so that the front handle is transmission connected with the adjusting rod.

16. The door lock according to claim 15, characterized in that: The transmission part is in the shape of a letter "I", and the transmission groove is in the shape of a letter "X".

17. The door lock according to claim 13, characterized in that: The clutch fork comprises a rotating shift block, a clutch and a clutch rotor; the clutch is used to engage the rotating shift block and the clutch rotor or to disconnect the rotating shift block and the clutch rotor; the square rod hole is arranged on the rotating shift block, and the clutch rotor is in transmission connection with the front rod.

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