Hook type padlock

Abstract

The utility model relates to the technical field of locks, in particular to a hook type padlock which comprises a cylindrical lock shell, a hook is arranged at the upper end of the lock shell, the lock shell is further provided with a swing arm in a rotating mode, and the swing arm and the hook are combined to form a closed ring. The lock shell extends to form a supporting cylinder, a mandrel for limiting the swing arm is arranged in the supporting cylinder, and a password wheel set penetrating through the side wall of the supporting cylinder to limit the mandrel is arranged on the outer side of the supporting cylinder. In the unlocking process, a correct password is input into the password wheel set, limitation on the core shaft is relieved, the core shaft can move in the axial direction to relieve limiting on the swing arm, and the closed ring can be opened. Compared with the prior art, the hook is wider in application range and higher in compatibility compared with an existing pulling piece stand column mode. Moreover, the mandrel is arranged in the supporting cylinder, and the password wheel set is arranged outside the supporting cylinder, so that the layout is compact, and the structure is stable.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a hook-type padlock. Background Technology

[0002] Chinese patent document CN107130861B discloses a rotary padlock, including a lock body. The upper end of the lock body has a rotatable disc and a notch for mounting a pull tab post. The disc covers the pull tab post. A combination wheel unlocking device is located in the middle of the lock body, and a lock cylinder unlocking device is located at the bottom. The rotary unlocking method eliminates the need to lift or pull out the disc; instead, the disc is rotated directly, pressing down the center rod of the combination wheel to unlock. The product's reset structure uses a pressing mechanism on the lock cylinder to disengage the inner sleeve of the combination wheel, thus resetting the combination wheel. This reset structure eliminates the need for a reset button, making the overall lock structure simpler and more compact.

[0003] The technologies previously developed by the inventors of the above technologies have become increasingly demanding in the market as products are updated and iterated. The above technologies use pull tab posts to restrict the pull tab, but they are difficult to use for non-pull tab types, and their compatibility needs to be further improved. Summary of the Invention

[0004] In view of the above-mentioned technical problems existing in the prior art, this utility model provides a hook-type padlock.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hook-type padlock is provided, comprising a cylindrical lock housing, characterized in that: a hook is provided at the upper end of the lock housing, and a swing arm is rotatably provided on the lock housing, the swing arm and the hook forming a closed loop;

[0007] The lock case extends to a support cylinder, inside which is a spindle that limits the movement of the swing arm, and outside the support cylinder is a combination wheel set that passes through the side wall of the support cylinder and limits the movement of the spindle.

[0008] When unlocking, entering the correct password into the combination wheel set will release the restriction on the spindle, allowing the spindle to move axially and release the restriction on the swing arm, thus opening the closed loop.

[0009] Specifically, the hook is a J-shaped structure integrally formed into the lock housing; the swing arm is bent, with its middle part hinged to the lock housing, and includes a fence section that connects to the hook and a transmission section that abuts the core shaft.

[0010] Specifically, the support cylinder is equipped with a return spring that applies force to the spindle so that the spindle remains facing upward against the swing arm, keeping the swing arm and hook in a closed loop. When unlocking, external force overcomes the force of the return spring and presses the fence section, causing the closed loop to open.

[0011] Specifically, the cylindrical lock housing has a receiving cavity, and the support cylinder extends integrally from the receiving cavity, and the support cylinder is arranged coaxially with the lock housing.

[0012] Specifically, the combination wheel set includes two or more number wheels and a code wheel. The code wheel is sleeved on the outside of the support cylinder, and the number wheels are sleeved on the outside of the code wheel in a corresponding manner. The outer side of the code wheel is provided with a positioning protrusion, and the inner side of the number wheel is provided with a positioning groove. The lock housing is provided with a positioning spring that applies force to the code wheel, so that the positioning protrusion is kept axially embedded in the positioning groove, so that the number wheel and the code wheel can rotate together while being able to move relative to each other axially.

[0013] Specifically, the outer side of the mandrel is provided with a limiting protrusion, the side wall of the support cylinder is provided with a transition hole along the axial direction for the limiting protrusion to pass through, and the outer side of the adjustment wheel is provided with a relief groove. In the locked state, the limiting protrusion and the relief groove are axially offset to restrict the axial movement of the mandrel. In the unlocked state, the limiting protrusion and the relief groove are axially aligned to allow the mandrel to move axially.

[0014] Specifically, the outer side of the support cylinder is also equipped with a number changing wheel and a number changing tray. The top of the number changing wheel has a spiral inclined surface around its circumference. The number changing tray is restricted circumferentially but can move axially. The number changing tray has a tray post that abuts against the spiral inclined surface. When the number wheel is in the correct password state, external force rotates the number changing wheel, which drives the number changing tray to push the code changing wheel axially. This causes the positioning protrusion of the code changing wheel to disengage from the positioning groove of the number wheel. The code changing wheel no longer follows the number wheel to rotate, and rotating the number wheel changes the number.

[0015] Specifically, a connecting seat is provided between the support cylinder and the digital wheel. The connecting seat is circumferentially engaged with the support cylinder and can move relative to it axially. An elastic interlocking structure is provided between the outer side of the connecting seat and the inner side of the digital wheel. The number changing tray, the connecting seat, and the code changing wheel abut against each other and can move together axially, and are axially positioned by the constraint of the positioning spring.

[0016] Specifically, the lower end of the support cylinder is fixed with an assembly seat, which includes an outer seat body and an inner seat body that are fixed to each other. The lower end of the inner seat body is inserted into the outer seat body and fixed. The upper end of the inner seat body is provided with a flange, and an annular first assembly cavity is formed between the flange and the upper end of the outer seat body. The number changing wheel is rotatably installed in the first assembly cavity. An annular second assembly cavity is formed between the inner seat body and the lock housing, and two or more number wheels are rotatably installed in the second assembly cavity.

[0017] Specifically, the number change tray is located at the top of the flange, and the flange is provided with guide holes through which the tray post of the number change tray passes.

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a hook-type padlock, which, compared with the existing technology, has a wider range of applications and stronger compatibility compared to the existing pull-tab post method. Furthermore, the spindle is set inside the support cylinder, while the combination wheel set is set outside the support cylinder, resulting in a compact layout and stable structure. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a hook-type padlock in one of the embodiments.

[0022] Figure 2 This is an exploded view of a hook-type padlock in one of the embodiments.

[0023] Figure 3 This is a cross-sectional view of a hook-type padlock in the embodiment, showing the correct password input state.

[0024] Figure 4 for Figure 3 A cross-sectional view of another section of the state.

[0025] Figure 5 This is a schematic diagram of a hook-type padlock during the number changing process in one of the embodiments.

[0026] Figure label:

[0027] Lock case 1, hook 11, receiving cavity 12, support cylinder 13, transition hole 131;

[0028] Swing arm 2, fence section 21, transmission section 22;

[0029] Mandrel 3, limiting protrusion 31;

[0030] Combination wheel set 4; number wheel 41, positioning groove 411; code wheel 42, positioning protrusion 421, clearance groove 422;

[0031] Number changing wheel 5, spiral inclined plane 51;

[0032] Replacement tray 6, tray column 61;

[0033] Connector 7, elastic interlocking structure 71;

[0034] Assembly base 8, outer seat body 81, inner seat body 82, flange 821, guide hole 822, pin 83. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] This embodiment includes a hook-type padlock, such as... Figures 1 to 5 As shown, the lock includes a cylindrical lock housing 1, with a hook 11 at the upper end. The hook 11 is an integrally formed J-shaped structure of the lock housing 1. The lock housing 1 is also rotatably provided with a swing arm 2, which, together with the hook 11, forms an openable closed loop, through which external objects are locked.

[0037] In this embodiment, the lock housing 1 extends with a support cylinder 13. The cylindrical lock housing 1 has a receiving cavity 12, and the support cylinder 13 extends integrally from the receiving cavity 12, and is coaxially arranged with the lock housing 1. The support cylinder 13 contains a spindle 3 that limits the movement of the swing arm 2, and a combination wheel set 4 that passes through the side wall of the support cylinder 13 and limits the movement of the spindle 3. During unlocking, entering the correct combination wheel set 4 releases the restriction on the spindle 3, allowing the spindle 3 to move axially and release the restriction on the swing arm 2, thus opening the closed loop.

[0038] Specifically, the swing arm 2 is bent, with its middle part hinged to the lock housing 1. It includes a fence section 21 that connects to the hook 11 and a transmission section 22 that abuts the spindle 3.

[0039] Specifically, inside the support cylinder 13 ( Figure 3 At point 100, a return spring is provided to apply force to the spindle 3 so that the spindle 3 remains facing upward against the swing arm 2, keeping the swing arm 2 and the hook 11 in a closed loop. When unlocking, external force overcomes the force of the return spring and presses the fence section 21, causing the closed loop to open.

[0040] In this embodiment, the combination wheel assembly 4 includes two number wheels 41 and two code-changing wheels 42. The code-changing wheels 42 are fitted onto the outside of the support cylinder 13, and the number wheels 41 are fitted onto the outside of the code-changing wheels 42 in a corresponding manner. The outer side of the code-changing wheels 42 is provided with a positioning protrusion 421, and the inner side of the number wheels 41 is provided with a positioning groove 411. Inside the lock housing 1 (… Figure 3 A positioning spring is provided at reference 200 to apply force to the code wheel 42 (downward), so that the positioning protrusion 421 is kept axially embedded in the positioning groove 411, so that the digital wheel 41 and the code wheel 42 can rotate together and move relative to each other axially.

[0041] Specifically, a limiting protrusion 31 is provided on the outer side of the spindle 3, and a transition hole 131 is provided on the side wall of the support cylinder 13 along the axial direction for the limiting protrusion 31 to pass through. A relief groove 422 is provided on the outer side of the adjustment wheel 42. In the locked state, the limiting protrusion 31 and the relief groove 422 are axially offset to restrict the axial movement of the spindle 3. In the unlocked state, the limiting protrusion 31 and the relief groove 422 are axially aligned to enable the spindle 3 to move axially.

[0042] Specifically, the outer side of the support cylinder 13 is also provided with a number-changing wheel 5 and a number-changing tray 6. The top of the number-changing wheel 5 is provided with a spiral inclined surface 51 around its circumference. The number-changing tray 6 is restricted in its circumference but can move axially. The number-changing tray 6 is provided with a tray post 61 that abuts against the spiral inclined surface 51. When the number wheel 41 is in the correct password state, an external force rotates the number-changing wheel 5, and the spiral inclined surface 51 moves axially against the tray post 61, driving the number-changing tray 6 to axially push the code-changing wheel 42, causing the positioning protrusion 421 of the code-changing wheel 42 to disengage from the positioning groove 411 of the number wheel 41. Figure 5 In the state shown, the dial wheel 42 no longer rotates with the number wheel 41, and rotating the number wheel 41 changes the number.

[0043] Specifically, a connecting seat 7 is provided between the support cylinder 13 and the number wheel 41. The support cylinder 13 passes through the connecting seat 7, and the connecting seat 7 and the support cylinder 13 are circumferentially engaged but can move relative to each other axially. An elastic interlocking structure 71 (petal-shaped) is provided between the outer side of the connecting seat 7 and the inner side of the number wheel 41, allowing the number wheel 41 to rotate step by step, providing a better feel for the user. As can be seen from the above, the number changing tray 6, the connecting seat 7, and the number changing wheel 42 abut against each other and can move together axially, and are axially positioned by the constraint of the positioning spring. When changing numbers, the number changing wheel 5 overcomes the constraint force of the positioning spring and drives these parts to move together axially.

[0044] Specifically, a mounting base 8 is fixed to the lower end of the support cylinder 13. The mounting base 8 includes an outer seat body 81 and an inner seat body 82 fixed to each other. The lower end of the inner seat body 82 is inserted into the outer seat body 81, and the outer seat body 81, the inner seat body 82, and the support cylinder 13 are fixed together by a pin 83. The upper end of the inner seat body 82 is provided with a flange 821, and a first annular mounting cavity is formed between the flange 821 and the upper end of the outer seat body 81. The number changing wheel 5 is rotatably installed in the first mounting cavity, so that the number changing wheel 5 can rotate but cannot move axially. Similarly, a second annular mounting cavity is formed between the inner seat body 82 and the lock housing 1, and two number wheels 41 are rotatably installed in the second mounting cavity, so that the number wheels 41 can rotate but cannot move axially.

[0045] Specifically, the number changing tray 6 is located at the top of the flange 821, and the flange 821 is provided with a guide hole 822. The tray post 61 of the number changing tray 6 passes through the guide hole 822, so that the number changing tray 6 can only move axially and cannot rotate.

[0046] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A hook-type padlock, comprising a cylindrical lock housing (1), characterized in that: The upper end of the lock case (1) is provided with a hook (11), and the lock case (1) is also rotatably provided with a swing arm (2), which is combined with the hook (11) to form a closed loop; The lock case (1) extends with a support cylinder (13), and the support cylinder (13) is provided with a spindle (3) that limits the swing arm (2). The support cylinder (13) is provided with a combination wheel set (4) that limits the spindle (3) by passing through the side wall of the support cylinder (13). When unlocking, the correct password is entered into the password wheel set (4), which releases the restriction on the spindle (3), allowing the spindle (3) to move axially and release the restriction on the swing arm (2), thus opening the closed loop.

2. A hook-type padlock according to claim 1, characterized in that: The hook (11) is a J-shaped structure integrally formed on the lock shell (1); the swing arm (2) is bent and its middle part is hinged to the lock shell (1), which includes a fence section (21) that connects to the hook (11) and a transmission section (22) that abuts the spindle (3).

3. A hook-type padlock according to claim 2, characterized in that: The support cylinder (13) is equipped with a return spring that applies force to the spindle (3) so that the spindle (3) remains facing upward against the swing arm (2), so that the swing arm (2) and the hook (11) remain in a closed loop. When unlocking, the external force overcomes the force of the return spring and presses the fence section (21), so that the closed loop is opened.

4. A hook-type padlock according to claim 1, characterized in that: The cylindrical lock shell (1) is provided with a receiving cavity (12), and the support cylinder (13) extends integrally from the receiving cavity (12), and the support cylinder (13) is arranged coaxially with the lock shell (1).

5. A hook-type padlock according to claim 1 or 4, characterized in that: The code wheel assembly (4) includes two or more number wheels (41) and a code wheel (42). The code wheel (42) is sleeved on the outside of the support cylinder (13), and the number wheels (41) are sleeved on the outside of the code wheel (42) in a corresponding manner. The code wheel (42) has a positioning protrusion (421) on its outer side, and a positioning groove (411) is provided on the inner side of the number wheel (41). The lock housing (1) is provided with a positioning spring that applies force to the code wheel (42), so that the positioning protrusion (421) is axially embedded in the positioning groove (411), thereby enabling the number wheel (41) and the code wheel (42) to rotate together and move relative to each other axially.

6. A hook-type padlock according to claim 5, characterized in that: The outer side of the spindle (3) is provided with a limiting protrusion (31), and the side wall of the support cylinder (13) is provided with a transition hole (131) for the limiting protrusion (31) to pass through. The outer side of the adjustment wheel (42) is provided with a relief groove (422). In the locked state, the limiting protrusion (31) and the relief groove (422) are axially offset to restrict the axial movement of the spindle (3). In the unlocked state, the limiting protrusion (31) and the relief groove (422) are axially aligned to enable the spindle (3) to move axially.

7. A hook-type padlock according to claim 5, characterized in that: The outer side of the support cylinder (13) is also provided with a number changing wheel (5) and a number changing tray (6). The top of the number changing wheel (5) is provided with a spiral inclined surface (51) around the circumference. The number changing tray (6) is restricted in the circumference but can move axially. The number changing tray (6) is provided with a tray post (61) that abuts against the spiral inclined surface (51). When the number wheel (41) is in the correct password state, the external force rotates the number changing wheel (5) and drives the number changing tray (6) to push the code changing wheel (42) axially, so that the positioning protrusion (421) of the code changing wheel (42) disengages from the positioning groove (411) of the number wheel (41). The code changing wheel (42) no longer follows the number wheel (41) to rotate. Rotating the number wheel (41) changes the number.

8. A hook-type padlock according to claim 7, characterized in that: A connecting seat (7) is provided between the support cylinder (13) and the digital wheel (41). The connecting seat (7) is circumferentially engaged with the support cylinder (13) and can move relative to it axially. An elastic interlocking structure (71) is provided between the outer side of the connecting seat (7) and the inner side of the digital wheel (41). The number changing tray (6), the connecting seat (7), and the code changing wheel (42) abut against each other and can move together axially. They are also axially positioned by the constraint of the positioning spring.

9. A hook-type padlock according to claim 7, characterized in that: The lower end of the support cylinder (13) is fixed with an assembly seat (8). The assembly seat (8) includes an outer seat body (81) and an inner seat body (82) that are fixed to each other. The lower end of the inner seat body (82) is inserted into the outer seat body (81) and fixed. The upper end of the inner seat body (82) is provided with a flange (821). A first annular assembly cavity is formed between the flange (821) and the upper end of the outer seat body (81). The number changing wheel (5) is rotatably installed in the first assembly cavity. A second annular assembly cavity is formed between the inner seat body (82) and the lock shell (1). Two or more number wheels (41) are rotatably installed in the second assembly cavity.

10. A hook-type padlock according to claim 9, characterized in that: The number changing tray (6) is located on top of the flange (821), and the flange (821) is provided with a guide hole (822). The tray post (61) of the number changing tray (6) passes through the guide hole (822).

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