Latch bolt assembly capable of adjusting center distance

Abstract

The invention discloses a latch bolt assembly capable of adjusting the center distance, and the latch bolt assembly comprises a strip-shaped first housing which is rotatably provided with a dial wheel and is provided with a first cylinder part; a second housing having a second cylindrical portion coaxial with the first cylindrical portion; the spiral guide groove is formed in one of the first cylinder part and the second cylinder part around the central axis of the first cylinder part; the guide cylinder is arranged on the other one of the first cylinder part and the second cylinder part and is arranged in the spiral guide groove in a penetrating manner; the tongue body is telescopically arranged at one end, far away from the first shell, of the second shell; one end of the linkage rod group can drive the tongue body to retract into the second shell; the driving part is provided with a first driving part and a second driving part which are arranged in a staggered mode in the length direction and the circumferential direction of the first cylinder part, and the distance between the first driving part and the tongue body is larger than that between the second driving part and the tongue body; therefore, the center distance of the latch bolt assembly is adjusted through a very simple structure, operation is easy, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field related to locks, and in particular to an inclined bolt assembly with adjustable center distance. Background Art

[0002] The latch bolt assembly is the main mechanism for the door lock to achieve the open or closed state. The center distance between the dial wheel and the bolt body of the latch bolt assembly is different, which defines the latch bolt assembly with different installation specifications. The center distances of the commonly used latch bolt assemblies are 60mm and 70mm. In the existing lock bolt, the length of the lock bolt is generally fixed and cannot be adjusted, resulting in the inability to adapt to the installation needs of different center distance requirements.

[0003] Among them, the tongue body of the inclined tongue assembly includes two types: an inclined tongue and a dead tongue. Since the dead tongue does not adopt a spring mechanism, an adjustment mechanism for adjusting the center distance of the dead tongue has appeared in the relevant technology. However, the adjustment mechanism has a complicated structure and often requires professional personnel to install and debug. It is troublesome to use, and it is easy to get stuck during adjustment and has poor stability. Moreover, since the inclined tongue adopts a spring mechanism, this adjustment mechanism cannot be adapted to the inclined tongue assembly of the inclined tongue. Therefore, there is currently no inclined tongue assembly of the inclined tongue that can adjust the center distance. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention aims to provide a latch bolt assembly that can adjust the center distance with a very simple structure, which is easy to operate and convenient to use.

[0005] According to an embodiment of the present invention, an inclined tongue assembly with adjustable center distance comprises: a first shell of elongated shape, a thumbwheel is rotatably arranged in the first shell, the first shell has a first cylindrical portion extending along its length direction; a second shell, the second shell has a second cylindrical portion coaxially arranged with the first cylindrical portion, the first cylindrical portion is sleeved on the outside of the second cylindrical portion, or the second cylindrical portion is sleeved on the outside of the first cylindrical portion; a spiral guide groove is formed on the circumferential wall of one of the first cylindrical portion and the second cylindrical portion around the central axis of the first cylindrical portion; a guide cylinder is arranged on the other of the first cylindrical portion and the second cylindrical portion and penetrates into the spiral guide groove; a tongue body is telescopically arranged at one end of the second shell away from the first shell; a linkage rod group is movably arranged between the second cylindrical portion and the first cylindrical portion, the One end of the linkage rod group can drive the tongue body to retract into the second shell; a driving member is arranged between the dial and the other end of the linkage rod group, and the driving member has a first driving part and a second driving part arranged along the length direction of the first cylindrical part and circumferentially staggered, and the distance between the first driving part and the tongue body is greater than the distance between the second driving part and the tongue body; when the second cylindrical part rotates in a first clockwise direction relative to the first cylindrical part to move the guide cylinder to one end of the spiral guide groove, the first driving part contacts the linkage rod group to place the inclined tongue assembly in a first working position; when the second cylindrical part rotates in a second clockwise direction relative to the first cylindrical part to move the guide cylinder to the other end of the spiral guide groove, the second driving part contacts the linkage rod group to place the inclined tongue assembly in a second working position.

[0006] An inclined tongue assembly with adjustable center distance according to an embodiment of the present invention has at least the following beneficial effects:

[0007] When the center distance of the inclined tongue assembly of the above structure needs to be adjusted, it is only necessary to drive the second cylindrical part to rotate relatively around the central axis of the first cylindrical part, and the guide cylinder can move from one end of the spiral guide groove to the other end. In this process, the length dimension of the whole composed of the first shell and the second shell becomes longer or shorter, and the driving member also rotates and telescopically moves relative to the linkage rod group, so that the first driving part contacts the linkage rod group to make the inclined tongue assembly in the first working position with a smaller center distance, or the second driving part contacts the linkage rod group to make the inclined tongue assembly in the second working position with a larger center distance, thereby adjusting the center distance of the inclined tongue assembly with a very simple structure, simple operation, and convenient use. Moreover, when the inclined tongue assembly is stabilized in the first working position or the second working position by combining the spiral guide groove and the guide cylinder, the first shell and the second shell cannot move when they are only subjected to external forces along the axial direction of the first cylindrical part, thereby ensuring the reliability of the inclined tongue assembly during operation.

[0008] In some embodiments of the present invention, the first cylindrical portion is sleeved on the outside of the second cylindrical portion, the spiral guide groove is formed on the first cylindrical portion, the guide cylinder protrudes from the outer circumferential wall of the second cylindrical portion to extend into the spiral guide groove, and both ends of the spiral guide groove are connected with arc positioning grooves extending in the circumferential direction of the second cylindrical portion.

[0009] In some embodiments of the present invention, the projection of the whole composed of the spiral guide groove and the two circular arc positioning grooves in the axial direction of the first cylindrical part is semicircular, and the first driving part and the second driving part are symmetrically arranged about the axial center of the first cylindrical part.

[0010] In some embodiments of the present invention, the tongue body is connected to a first elastic member that drives it to extend out of the second shell, the driving member is slidably arranged on the first shell along a direction parallel to the extension and retraction direction of the tongue body, the linkage rod group includes a push rod slidably arranged on the second shell along a direction parallel to the extension and retraction direction of the tongue body and a rotating arm rotatably arranged on the second shell, one end of the rotating arm is movably connected to the tongue body, the other end of the rotating arm abuts against one end of the push rod, the other end of the push rod abuts against the first driving part or the second driving part, and the dial has a cam part that can push the driving member to move toward the direction of the tongue body.

[0011] In some embodiments of the present invention, the thumbwheel includes a cylinder, a transmission groove is provided in the middle portion of the cylinder, the cam portion is formed on the outer peripheral wall of the cylinder and is in the shape of a small cut circle, coplanar driving planes are respectively provided at two intersections of the cam portion and the cylinder, the driving member has a notch groove corresponding to the cylinder, and a first abutment portion and a second abutment portion corresponding to the two driving planes are respectively provided on a side of the driving member close to the thumbwheel, the first driving portion is provided on the side of the driving member opposite to the first abutment portion, the second driving portion is provided on the side of the driving member opposite to the second abutment portion, and the distance between the first driving portion and the first abutment portion is smaller than the distance between the second driving portion and the second abutment portion.

[0012] In some embodiments of the present invention, the first shell includes a side plate and a cover body formed as a whole with the side plate, a containing space for accommodating the dial and the driving member is defined between the side plate and the cover body, the driving member includes a flat plate portion abutting against the inner wall of the side plate, the flat plate portion is provided with a sliding guide portion abutting against the inner wall of the cover body, the first abutting portion and the second abutting portion are respectively formed on the upper side and the lower side of one end of the flat plate portion close to the dial, and the first driving portion and the second driving portion are respectively formed on the upper side and the lower side of one end of the flat plate portion close to the tongue body.

[0013] In some embodiments of the present invention, the upper side and the lower side of one end of the flat plate portion close to the thumb wheel are both formed with a first side ear bent toward the cover body, and the two first side ears respectively constitute the first abutting portion and the second abutting portion, the upper side and the lower side of one end of the flat plate portion close to the tongue body are both formed with a second side ear bent toward the cover body, and the two second side ears respectively constitute the first driving portion and the second driving portion, the sliding guide portion is a third side ear formed between the first side ear and the second side ear, and the flat plate portion, the first side ear, the second side ear and the third side ear are an integrated structure.

[0014] In some embodiments of the present invention, a guide hole parallel to the sliding direction of the driving member is penetrated through the side of the cover body, and one of the first side ears, the second side ears, or the third side ears has a guide member penetrated through the guide hole, and a second elastic member is connected between the guide hole and the guide member to drive the guide member to reset and move.

[0015] In some embodiments of the present invention, a mounting seat is provided inside the end of the second shell near the driving member, the rotating arm is rotatably arranged on the mounting seat via a pivot orthogonal to the second cylindrical portion, an avoidance groove for reciprocating rotation of the rotating arm is provided inside the mounting seat, a guide channel matching the push rod is provided at the end of the second shell near the driving member, the guide channel is communicated with the avoidance groove, a hook is provided at the end of the rotating arm away from the avoidance groove, and the tongue is provided with a hook groove corresponding to the hook.

[0016] 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

[0017] The above or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic structural diagram of a second housing of an embodiment of a latch tongue assembly of the present invention in a first working position;

[0019] Figure 2 for Figure 1 A schematic structural diagram of the second housing of the embodiment in a second working position;

[0020] Figure 3 for Figure 1 A schematic diagram of a state in which the tongue of the embodiment is retracted into the second housing;

[0021] Figure 4 for Figure 1 A schematic diagram of the internal structure of the embodiment after removing the first shell and the second shell;

[0022] Figure 5 for Figure 1 A schematic diagram of the structural decomposition of an embodiment.

[0023] Reference numerals:

[0024] The first shell 100; the first cylindrical portion 110; the side plate 120; the cover 130; the guide hole 131; the dial 200; the cam portion 210; the cylinder 220; the transmission groove 230; the driving plane 240; the second shell 300; the second cylindrical portion 310; the mounting seat 320; the guide channel 330; the spiral guide groove 410; the arc positioning groove 411; the guide cylinder 420; the tongue 500; the first elastic member 510; the hook groove 520; the linkage rod group 600; the push rod 610; the rotating arm 620; the pivot 621; the hook portion 622; the driving member 700; the first driving portion 710; the second driving portion 720; the notch groove 730; the first abutment portion 740; the second abutment portion 750; the guide member 751; the sliding guide portion 760. DETAILED DESCRIPTION

[0025] 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.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference Figures 1 to 5 According to an embodiment of the present invention, a latch tongue assembly with adjustable center distance includes: a first long shell 100, a dial wheel 200 is rotatably arranged in the first shell 100, and the first shell 100 has a first cylindrical portion 110 extending along its length direction; a second shell 300, the second shell 300 has a second cylindrical portion 310 coaxially arranged with the first cylindrical portion 110, the first cylindrical portion 110 is sleeved on the outside of the second cylindrical portion 310, or the second cylindrical portion 310 is sleeved on the first cylindrical portion 110. The outer part; a spiral guide groove 410, formed on the circumferential wall of one of the first cylindrical part 110 and the second cylindrical part 310 around the central axis of the first cylindrical part 110; a guide cylinder 420, provided on the other of the first cylindrical part 110 and the second cylindrical part 310, and penetrated into the spiral guide groove 410; a tongue 500, telescopically provided at one end of the second shell 300 away from the first shell 100; a linkage rod group 600, movably provided between the second cylindrical part 310 and the first cylindrical part 110, One end of the linkage rod group 600 can drive the tongue 500 to retract into the second shell 300; the driving member 700 is arranged between the dial 200 and the other end of the linkage rod group 600, and the driving member 700 has a first driving part 710 and a second driving part 720 arranged along the length direction of the first cylindrical part 110 and circumferentially staggered, and the distance between the first driving part 710 and the tongue 500 is greater than the distance between the second driving part 720 and the tongue 500; when the second cylindrical part 310 is relatively When the first cylindrical portion 110 rotates in a first clockwise direction to move the guide cylinder 420 to one end of the spiral guide groove 410, the first driving portion 710 contacts the linkage rod group 600 to place the inclined tongue assembly in a first working position; when the second cylindrical portion 310 rotates in a second clockwise direction relative to the first cylindrical portion 110 to move the guide cylinder 420 to the other end of the spiral guide groove 410, the second driving portion 720 contacts the linkage rod group 600 to place the inclined tongue assembly in a second working position.

[0029] When the center distance of the inclined tongue assembly of the above structure needs to be adjusted, it is only necessary to drive the second cylindrical portion 310 to rotate relatively around the central axis of the first cylindrical portion 110, and the guide cylinder 420 can move from one end of the spiral guide groove 410 to the other end. In this process, the length dimension of the whole composed of the first shell 100 and the second shell 300 becomes longer or shorter, and the driving member 700 also rotates and telescopically moves relative to the linkage rod group 600, so that the first driving portion 710 contacts the linkage rod group 600 to make the inclined tongue assembly in the first working position with a smaller center distance, or the second driving portion 720 contacts the linkage rod group 600 to make the inclined tongue assembly in the second working position with a larger center distance, thereby adjusting the center distance of the inclined tongue assembly with a very simple structure, which is simple to operate and convenient to use. Moreover, when the inclined tongue assembly is stabilized in the first working position or the second working position by combining the spiral guide groove 410 and the guide cylinder 420, the first shell 100 and the second shell 300 cannot move when only subjected to an external force along the axial direction of the first cylindrical portion 110, thereby ensuring the reliability of the inclined tongue assembly during operation.

[0030] Taking the two specifications of the center distance of the inclined tongue assembly of 60mm and 70mm as an example, specifically, when the second cylindrical portion 310 is rotated into position relative to the first cylindrical portion 110 in the first clockwise direction, the second shell 300 retracts relative to the first shell 100 and the center distance of the inclined tongue assembly is adjusted to 60mm. At this time, the first driving portion 710 abuts against one end of the linkage rod group 600, and when the dial 200 rotates, it pushes the driving member 700 to move in the direction close to the tongue body 500, thereby driving the tongue body 500 to retract through the linkage rod group 600, thereby achieving unlocking; when the second cylindrical portion 310 is rotated into position relative to the first cylindrical portion 110 in the second clockwise direction, the second shell 300 extends relative to the first shell 100 and the center distance of the inclined tongue assembly is adjusted to 70mm. At this time, the second driving portion 720 abuts against one end of the linkage rod group 600, and when the dial 200 rotates, it pushes the driving member 700 to move in the direction close to the tongue body 500, thereby achieving unlocking. One of the first clockwise direction and the second clockwise direction is clockwise, and the other is counterclockwise.

[0031] See also Figure 1 and Figure 2In some embodiments of the present invention, the first cylindrical portion 110 is sleeved on the outside of the second cylindrical portion 310, the spiral guide groove 410 is formed on the first cylindrical portion 110, and the guide cylinder 420 is protrudingly arranged on the outer wall of the second cylindrical portion 310 to extend into the spiral guide groove 410. In order to further improve stability and reliability and avoid the first shell 100 and the second shell 300 from generating a rotational force when an external force along the axial direction of the first cylindrical portion 110 is applied, both ends of the spiral guide groove 410 are connected with an arc positioning groove 411 extending in the circumferential direction of the second cylindrical portion 310.

[0032] Of course, in some embodiments, the following structure can be used as an alternative: the second cylindrical portion 310 is sleeved on the outside of the first cylindrical portion 110, the spiral guide groove 410 is formed on the second cylindrical portion 310, and accordingly, the guide cylinder 420 is protrudingly arranged on the outer peripheral wall of the first cylindrical portion 110 to extend into the spiral guide groove 410.

[0033] See also Figure 5 In some embodiments of the present invention, the projection of the whole composed of the spiral guide groove 410 and the two circular arc positioning grooves 411 in the axial direction of the first cylindrical portion 110 is semicircular, and the first driving portion 710 and the second driving portion 720 are symmetrically arranged about the axial center of the first cylindrical portion 110, that is, the user can switch the inclined tongue assembly from the first working position to the second working position, or switch the inclined tongue assembly from the second working position to the first working position by rotating the second shell 300 180° relative to the first shell 100. In addition, it is particularly important to explain that in traditional technologies, the dead tongue does not use a spring mechanism, and some dead tongues also use a combination of a guide cylinder 420 and a spiral guide groove 410 to achieve the adjustment of the center distance. However, in order to ensure that the internal transmission structure of the dead tongue can achieve movement, it is also necessary to set another set of guide cylinders 420 and spiral guide grooves 410 between the tongue body 500 of the dead tongue and the second shell 300, which leads to complex assembly, high precision requirements, easy jamming and other problems. The technical solution of the present invention cleverly solves the above problems by simplifying the structure and making the drive member 700 and the push rod 610 separable.

[0034] See also Figure 4 and Figure 5In some embodiments of the present invention, the tongue body 500 is connected to a first elastic member 510 that drives it to extend out of the second shell 300, the driving member 700 is slidably arranged on the first shell 100 along a direction parallel to the extension and contraction of the tongue body 500, the linkage rod group 600 includes a push rod 610 slidably arranged on the second shell 300 along a direction parallel to the extension and contraction of the tongue body 500 and a rotating arm 620 rotatably arranged on the second shell 300, one end of the rotating arm 620 is movably connected to the tongue body 500, the other end of the rotating arm 620 is abutted against one end of the push rod 610, and the other end of the push rod 610 is abutted against the first driving part 710 or the second driving part 720, and the dial 200 has a cam portion 210 that can push the driving member 700 to move toward the direction of the tongue body 500. It can be understood that when the dial 200 does not rotate, the tongue 500 remains extended out of the second housing 300 under the action of the first elastic member 510. When the second housing 300 rotates relative to the first housing 100, the driving member 700 also rotates relative to the linkage rod group 600. If the push rod 610 originally abuts against the first driving part 710, the push rod 610 can be abutted against the second driving part 720 after rotation. After the adjustment of the center distance is completed, the various components maintain contact. Specifically, when the dial 200 rotates, the cam part 210 pushes the driving member 700 to move toward the tongue 500. The driving member 700 pushes the push rod 610 to move toward the tongue 500 through the first driving part 710 or the second driving part 720. The push rod 610 can drive the rotation of the rotating arm 620, and the rotating arm 620 drags the tongue 500 to retract. The above-mentioned driving member 700 and linkage rod group 600 are of very simple structure, and the linkage method is simple. Moreover, during the rotation and extension of the second shell 300 relative to the first shell 100, the driving member 700 and the push rod 610 are first separated and then contacted, and there is no need to configure a locking and unlocking structure separately, which greatly simplifies the structural design that can realize center distance adjustment.

[0035] See also Figures 3 to 5In some embodiments of the present invention, the thumbwheel 200 includes a cylinder 220, a transmission groove 230 is provided in the middle of the cylinder 220, the cam portion 210 is formed on the outer peripheral wall of the cylinder 220 and is in the shape of a small cut circle, coplanar driving planes 240 are respectively provided at two intersections of the cam portion 210 and the cylinder 220, the driving member 700 has a notch groove 730 corresponding to the cylinder 220, and a first abutting portion 740 and a second abutting portion 750 corresponding to the two driving planes 240 are provided on a side of the driving member 700 close to the thumbwheel 200, the first driving portion 710 is provided on the side of the driving member 700 opposite to the first abutting portion 740, the second driving portion 720 is provided on the side of the driving member 700 opposite to the second abutting portion 750, and the distance between the first driving portion 710 and the first abutting portion 740 is smaller than the distance between the second driving portion 720 and the second abutting portion 750. It is understandable that when the tongue 500 extends out of the second housing 300, the first abutment portion 740 and the second abutment portion 750 contact the two driving planes 240 at the same time to prevent the thumbwheel 200 from rotating easily. The square rod of the door lock is inserted into the transmission groove 230. When the square rod drives the thumbwheel 200 to rotate clockwise or counterclockwise, the cam portion 210 contacts the first abutment portion 740 or the second abutment portion 750 to push the driving member 700 and the push rod 610 to move, thereby driving the tongue 500 to retract and unlock, that is, the thumbwheel 200 can be unlocked by rotating a small angle clockwise or counterclockwise. In this embodiment, in order to limit the rotation angle of the thumbwheel 200, the side wall of the first housing 100 is provided with an arc hole surrounding the axial direction of the cylinder 220 and a convex bump provided on the thumbwheel 200 and reciprocatingly sliding in the arc hole.

[0036] See also Figure 5In some embodiments of the present invention, the first shell 100 includes a side plate 120 and a cover body 130 formed as a whole with the side plate 120, and a accommodating space for accommodating the dial 200 and the driving member 700 is defined between the side plate 120 and the cover body 130, and the driving member 700 includes a flat plate portion abutting against the inner wall of the side plate 120, and the flat plate portion is provided with a sliding guide portion 760 abutting against the inner wall of the cover body 130, the first abutting portion 740 and the second abutting portion 750 are respectively formed on the upper side and the lower side of one end of the flat plate portion close to the dial 200, and the first driving portion 710 and the second driving portion 720 are respectively formed on the upper side and the lower side of one end of the flat plate portion close to the tongue 500. Specifically, the width of the side plate 120 is consistent with the width of the flat plate portion. When the sliding guide portion 760 abuts against the inner wall of the cover body 130, the flat plate portion slides horizontally along the inner wall of the side plate 120, so there is no need to set up a separate slide rail structure. In addition, the first abutting portion 740, the second abutting portion 750, the first driving portion 710, and the second driving portion 720 are respectively formed on the flat plate portion, which is conducive to further reducing the number of parts and simplifying the production and processing process.

[0037] See also Figure 4 and Figure 5 In some embodiments of the present invention, the upper and lower sides of one end of the flat plate portion close to the dial wheel 200 are both formed with first side ears bent toward the cover body 130, and the two first side ears respectively constitute the first abutting portion 740 and the second abutting portion 750; the upper and lower sides of one end of the flat plate portion close to the tongue body 500 are both formed with second side ears bent toward the cover body 130, and the two second side ears respectively constitute the first driving portion 710 and the second driving portion 720; the sliding guide portion 760 is a third side ear formed between the first side ear and the second side ear; the flat plate portion, the first side ear, the second side ear and the third side ear are an integrated structure; the driving member 700 composed of the flat plate portion, the first side ear, the second side ear and the third side ear can be obtained by integral stamping of sheet metal parts, integral injection molding of plastic parts, integral casting as a casting, etc.

[0038] See also Figure 1 and Figure 3In some embodiments of the present invention, when the user no longer applies force to rotate the dial 200, in order to automatically reset the rotation angle of the dial 200 and prevent the sliding stroke of the driving member 700 from exceeding a preset range, a guide hole 131 parallel to the sliding direction of the driving member 700 is penetrated on the side of the cover body 130, and one of the first side ears or the second side ears or the third side ears has a guide member 751 penetrated through the guide hole 131, and the guide hole 131 and the guide member 751 are connected to each other. A second elastic member (not shown in the figure) is connected between the guide member 751 and the guide member 751, that is, when the guide member 751 moves along the guide hole 131 in the direction of compressing the second elastic member, the driving member 700 pushes the push rod 610 to move in the direction close to the tongue body 500, and drives the tongue body 500 to retract toward the second shell 300 through the rotation of the rotating arm 620. When the user no longer applies force to the rotating wheel, the joint action of the first elastic member 510 and the second elastic member is conducive to quickly and stably driving the various components to reset.

[0039] See also Figure 5 In some embodiments of the present invention, a mounting seat 320 is provided inside the end of the second shell 300 close to the driving member 700, and the rotating arm 620 is rotatably provided on the mounting seat 320 through a pivot 621 orthogonal to the second cylindrical portion 310. An avoidance groove (not shown in the figure) for the reciprocating rotation of the rotating arm 620 is provided inside the mounting seat 320. A guide channel 330 matching the push rod 610 is provided at the end of the second shell 300 close to the driving member 700, and the guide channel 330 is connected to the avoidance groove. A hook portion 622 is provided at the end of the rotating arm 620 away from the avoidance groove, and the tongue body 500 is provided with a hook groove 520 corresponding to the hook portion 622.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A latch bolt assembly with adjustable center distance, characterized in that: include: A first elongated shell (100), wherein a thumbwheel (200) is rotatably disposed in the first shell (100), and the first shell (100) has a first cylindrical portion (110) extending along its length direction; A second shell (300), wherein the second shell (300) has a second cylindrical portion (310) coaxially arranged with the first cylindrical portion (110), the first cylindrical portion (110) being sleeved on the outside of the second cylindrical portion (310), or the second cylindrical portion (310) being sleeved on the outside of the first cylindrical portion (110); a spiral guide groove (410) formed on a circumferential wall of one of the first cylindrical portion (110) and the second cylindrical portion (310) around a central axis of the first cylindrical portion (110); A guide cylinder (420) is provided on the other of the first cylindrical portion (110) and the second cylindrical portion (310), and is inserted into the spiral guide groove (410); A tongue (500) is telescopically arranged at an end of the second shell (300) away from the first shell (100); A linkage rod group (600) is movably disposed between the second cylindrical portion (310) and the first cylindrical portion (110), and one end of the linkage rod group (600) is capable of driving the tongue (500) to retract into the second shell (300); A driving member (700) is arranged between the thumbwheel (200) and the other end of the linkage rod group (600), the driving member (700) comprising a first driving portion (710) and a second driving portion (720) which are arranged along the length direction of the first cylindrical portion (110) and in a circumferentially staggered manner, the distance between the first driving portion (710) and the tongue body (500) being greater than the distance between the second driving portion (720) and the tongue body (500); When the second cylindrical portion (310) rotates in a first clockwise direction relative to the first cylindrical portion (110) so that the guide cylinder (420) moves to one end of the spiral guide groove (410), the first driving portion (710) contacts the linkage rod group (600) so that the inclined tongue assembly is in a first working position; when the second cylindrical portion (310) rotates in a second clockwise direction relative to the first cylindrical portion (110) so that the guide cylinder (420) moves to the other end of the spiral guide groove (410), the second driving portion (720) contacts the linkage rod group (600) so that the inclined tongue assembly is in a second working position.

2. The latch bolt assembly with adjustable center distance according to claim 1, characterized in that: The first cylindrical portion (110) is sleeved on the outside of the second cylindrical portion (310), the spiral guide groove (410) is formed on the first cylindrical portion (110), the guide cylinder (420) is protrudingly arranged on the outer peripheral wall of the second cylindrical portion (310) to extend into the spiral guide groove (410), and both ends of the spiral guide groove (410) are connected to arc positioning grooves (411) extending in the circumferential direction of the second cylindrical portion (310).

3. The latch bolt assembly with adjustable center distance according to claim 2, characterized in that: The projection of the whole formed by the spiral guide groove (410) and the two circular arc positioning grooves (411) in the axial direction of the first cylindrical portion (110) is semicircular, and the first driving portion (710) and the second driving portion (720) are symmetrically arranged about the axial center of the first cylindrical portion (110).

4. The latch bolt assembly with adjustable center distance according to claim 1, characterized in that: The tongue body (500) is connected to a first elastic member (510) for driving it to extend out of the second shell (300); the driving member (700) is slidably arranged on the first shell (100) along a direction parallel to the extension and retraction direction of the tongue body (500); the linkage rod group (600) includes a push rod (610) slidably arranged on the second shell (300) along a direction parallel to the extension and retraction direction of the tongue body (500) and a rotating arm (620) rotatably arranged on the second shell (300); one end of the rotating arm (620) is movably connected to the tongue body (500); the other end of the rotating arm (620) abuts against one end of the push rod (610); the other end of the push rod (610) abuts against the first driving part (710) or the second driving part (720); the dial (200) has a cam part (210) capable of pushing the driving member (700) to move toward the direction of the tongue body (500).

5. The latch bolt assembly with adjustable center distance according to claim 4, characterized in that: The thumbwheel (200) comprises a cylinder (220), a transmission groove (230) is provided in the middle of the cylinder (220), the cam portion (210) is formed on the outer peripheral wall of the cylinder (220) and is in the shape of a small circular shape, coplanar driving planes (240) are respectively provided at two intersections between the cam portion (210) and the cylinder (220), the driving member (700) has a notch groove (730) corresponding to the cylinder (220), and the driving member (700) is provided with two grooves (730) on one side close to the thumbwheel (200) The driving plane (240) respectively corresponds to a first abutment portion (740) and a second abutment portion (750); the first driving portion (710) is arranged on a side of the driving member (700) opposite to the first abutment portion (740); the second driving portion (720) is arranged on a side of the driving member (700) opposite to the second abutment portion (750); and the distance between the first driving portion (710) and the first abutment portion (740) is smaller than the distance between the second driving portion (720) and the second abutment portion (750).

6. The latch bolt assembly with adjustable center distance according to claim 5, characterized in that: The first shell (100) includes a side plate (120) and a cover body (130) formed integrally with the side plate (120); a storage space for accommodating the dial (200) and the driving member (700) is defined between the side plate (120) and the cover body (130); the driving member (700) includes a flat plate portion abutting against the inner wall of the side plate (120); the flat plate portion is provided with a sliding guide portion (760) abutting against the inner wall of the cover body (130); the first abutting portion (740) and the second abutting portion (750) are respectively formed on the upper side and the lower side of one end of the flat plate portion close to the dial (200); the first driving portion (710) and the second driving portion (720) are respectively formed on the upper side and the lower side of one end of the flat plate portion close to the tongue (500).

7. The latch bolt assembly with adjustable center distance according to claim 6, characterized in that: The upper side and the lower side of one end of the flat plate portion close to the thumbwheel (200) are both formed with a first side ear bent toward the cover body (130), and the two first side ears respectively constitute the first abutting portion (740) and the second abutting portion (750); the upper side and the lower side of one end of the flat plate portion close to the tongue body (500) are both formed with a second side ear bent toward the cover body (130), and the two second side ears respectively constitute the first driving portion (710) and the second driving portion (720); the sliding guide portion (760) is a third side ear formed between the first side ear and the second side ear, and the flat plate portion, the first side ear, the second side ear and the third side ear are an integrated structure.

8. The latch bolt assembly with adjustable center distance according to claim 7, characterized in that: A guide hole (131) parallel to the sliding direction of the driving member (700) is formed on the side of the cover body (130), wherein one of the first side ears, the second side ears, or the third side ears has a guide member (751) formed in the guide hole (131), and a second elastic member is connected between the guide hole (131) and the guide member (751) to drive the guide member (751) to return to its original position.

9. The latch bolt assembly with adjustable center distance according to claim 4, characterized in that: A mounting seat (320) is provided inside the end of the second shell (300) close to the driving member (700); the rotating arm (620) is rotatably mounted on the mounting seat (320) via a pivot (621) orthogonal to the second cylindrical portion (310); an escape groove for reciprocating rotation of the rotating arm (620) is provided inside the mounting seat (320); a guide channel (330) matching the push rod (610) is provided at the end of the second shell (300) close to the driving member (700); the guide channel (330) is communicated with the escape groove; a hook portion (622) is provided at the end of the rotating arm (620) away from the escape groove; and the tongue body (500) is provided with a hook groove (520) corresponding to the hook portion (622).

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