Hasp with internal lever tension

Abstract

The present application relates to the technical field of luggage lock, and particularly relates to a buckle lock with a connecting rod type inner tension, which comprises a buckling assembly, the inner side of a lock buckle shell is provided with a connecting rod group, the connecting rod group comprises a first swing arm and a second swing arm, the second swing arm is provided with a pre-tightening buckle, and a lock seat is provided with a pre-tightening hook matched with the pre-tightening buckle; the first rotating shaft and the second rotating shaft are provided with elastic members; in an unlocking state in which the buckle head and the hook head are separated, the elastic members drive the first swing arm to swing downward in a direction away from the lock buckle shell, and the first swing arm and the second swing arm are in a V-shaped unfolded state; in a locking state in which the buckle head and the hook head are matched, the first swing arm and the second swing arm are folded in a direction close to the lock buckle shell, and the pre-tightening buckle is clamped with the pre-tightening hook. Compared with the prior art, the inner tension structure adopts a connecting rod group structure, which is automatically unfolded in unlocking and automatically folded in locking to make the pre-tightening hook matched with the pre-tightening buckle, so that the user does not need to additionally operate the inner tension structure, the use is more convenient, and the use experience is improved.

Description

Technical Field

[0001] This invention relates to the field of luggage lock technology, specifically to a latch lock with a connecting rod and internal tension. Background Technology

[0002] One end of the combination lock is hinged to one opening side of the suitcase, and the other end is locked to the other opening side of the suitcase. Opening the combination lock disengages it from the other opening side of the suitcase, allowing the suitcase to be opened. The structure of a combination lock generally includes a locking block and a combination mechanism that controls the movement of the locking block. The combination mechanism includes a combination component and a movable block. The combination component controls the movement of the locking block through the movable block, while the locking block controls the movement of the latch or clasp, thereby locking or unlocking the combination lock. For example, Chinese patent document CN209556637U discloses "A Combination Lock for a Suitcase"; Chinese patent document CN215407959U discloses "A Combination Lock".

[0003] Existing combination locks mainly rely on the interlocking between the hook and the latch to achieve locking. However, there are some areas for improvement: the hook inserts into the lock body and engages with the latch on the push button. The hook exerts a large pulling force on the latch, especially when used in hard-framed bags such as aluminum cases, where the force on the latch is even greater. Consequently, the hook requires high strength. Furthermore, the latch on the push button must be compatible with the latch, limiting the scope for improvement.

[0004] Therefore, the applicant developed an internally tightened combination lock as shown in Chinese patent document CN219605081U, which includes a lock body for installation on one opening side of a bag and a lock hook for installation on the other opening side of the bag. The connecting end of the lock body is provided with a base for fixing to the bag. The base is provided with a first pivot, and the lock body is hinged to the base via the first pivot. The free end of the lock body is used to lock with the lock hook. The lock body includes a push torrent, a transmission component, and a locking assembly. The locking assembly restricts the movement of the push torrent via the transmission component. The push torrent is provided with a latch that engages with the lock hook. The bottom of the lock hook is provided with a mounting plate, and the mounting plate is provided with a pull hook. The inner side of the lock body is provided with a pull hook and a second pivot. The second pivot and the first pivot are arranged side by side but not on the same line. The pull hook is hinged to the lock body via the second pivot. When the lock body moves in the locking direction, the pull hook hooks the pull hook and pulls it towards the base to achieve the purpose of pre-positioning, reducing the force on the lock hook and the lock hook, and the double locking provides higher security.

[0005] The above-described latch is a single-piece structure that passively rotates within the lock body. During locking, when the lock body is open at an obtuse angle, the latch needs to be manually turned to engage the hook upon locking. If the latch does not completely disengage from the hook during unlocking, user intervention is required. Therefore, it is clear that the above internal tightening structure has room for improvement in enhancing the user experience. Summary of the Invention

[0006] In view of the above-mentioned technical problems in the prior art, the present invention provides a latch with a connecting rod type internal tensioning.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A linkage-type internal tensioning buckle is provided, comprising a buckling assembly. The buckling assembly includes a fixing base fixed to one opening side of the bag, a buckle module mounted on the fixing base, and a hook module fixed to the other opening side of the bag. The buckle module includes a buckle housing and a buckle head fixed inside the buckle housing, with one end of the buckle housing hinged to the fixing base. The hook module includes a lock seat and a hook head, with the hook head movably mounted inside the lock seat. The buckle head is inserted into the lock seat and engages with the hook head to lock. Its characteristic is:

[0009] The inner side of the lock housing is also provided with a linkage assembly, which includes a first swing arm and a second swing arm. One end of the first swing arm is hinged to the inner side of the lock housing via a first pivot, and the other end of the first swing arm is hinged to one end of the second swing arm via a second pivot. The swing angle of the first swing arm relative to the lock housing and the swing angle of the second swing arm relative to the first swing arm are constrained. The other end of the second swing arm is provided with a pre-tightening buckle, and the lock seat is provided with a pre-tightening hook that cooperates with the pre-tightening buckle. The first pivot and the second pivot are provided with elastic elements.

[0010] In the unlocked state where the buckle and hook are separated, the elastic element drives the first swing arm to swing downward away from the buckle housing, and the first and second swing arms are in a V-shaped unfolded state relative to each other.

[0011] In the locked state where the buckle and hook are engaged, the first and second swing arms fold towards the lock housing, and the pre-tightening buckle and pre-tightening hook are locked together.

[0012] As a further alternative, the elastic element is a torsion spring, which applies a spring force to the first rocker arm in a direction away from the latch housing, and applies a spring force to the second rocker arm in a direction away from the first rocker arm.

[0013] As a further optional solution, the hinge end of the first swing arm is provided with a first limiting part. After the first swing arm rotates to a preset angle, the first limiting part abuts against the inner wall of the locking housing to constrain the swing angle of the first swing arm. The end of the first swing arm away from the hinge end is provided with a second limiting part. After the second swing arm rotates to a preset angle, the second limiting part abuts against the second swing arm to constrain the swing angle of the second swing arm.

[0014] As a further optional solution, a compression spring is provided between the fixing base and the latch housing so that the latch module automatically lifts up after unlocking.

[0015] As a further alternative, the pre-tightening buckle is sheet-shaped, including a first buckle portion and a second buckle portion, and the pre-tightening hook correspondingly includes a first hook portion and a second hook portion.

[0016] As a further alternative, the mounting base extends to include a support portion, with the second pivot located above the support portion.

[0017] As a further optional solution, a central locking assembly and a long housing are also included. The central locking assembly is installed in the middle of the long housing, and two sets of fastening components are installed at the two ends of the long housing respectively. The central locking assembly can control the movement of the hook to release the limit on the buckle and unlock.

[0018] As a further optional solution, the central locking system includes a combination wheel assembly, a center rod, an unlocking mechanism, and a transmission rod. The transmission rod is slidably installed in the elongated housing. One end of the transmission rod is connected to the unlocking mechanism, and the other end is connected to the hook drive. The center rod passes through the combination wheel assembly and constrains the unlocking mechanism. Only after the combination wheel assembly rotates to the correct combination can the center rod move axially and thus release the constraint on the unlocking mechanism.

[0019] As a further optional solution, the unlocking component is a button with a wedge-shaped mating surface between the button and the center rod. The transmission rod is provided with an inclined groove, and the button is partially embedded in the inclined groove so that pressing the button with external force will drive the transmission rod to move in the vertical direction.

[0020] As a further optional feature, the unlocking mechanism also includes a lock cylinder. Inserting the correct key can rotate the lock cylinder, thereby causing the button and the wedge-shaped mating surface of the center rod to be misaligned.

[0021] The beneficial effects of this invention are:

[0022] The present invention provides a locking mechanism with a connecting rod and internal tension, which, compared with the prior art:

[0023] (1) Due to the linkage assembly, the pre-tightening buckle of the linkage assembly cooperates with the pre-tightening hook on the lock seat. When the lock module rotates to hook the lock hook module, the pre-tightening buckle pre-hooks and tightens the pre-tightening hook before the buckle and hook head cooperate. This fixes the relative positions of the two opening sides of the bag and achieves the purpose of pre-positioning. When the lock housing is further pressed down and rotated, the buckle can be accurately inserted into the lock seat and cooperate with the hook head, improving the user experience. Furthermore, the force-bearing parts of the lock module and lock hook module located on the two opening sides of the bag are mainly on the pre-tightening buckle and pre-tightening hook. The buckle and hook head, which originally mainly bear the force, play a large role in locking and bear a small force. Therefore, the strength requirements for the buckle and hook head are low. The pre-tightening buckle and pre-tightening hook are covered by the lock housing. Combined with the double locking of the pre-tightening buckle and pre-tightening hook, and the buckle and hook head, the safety performance is higher, and its strength is easier to achieve in manufacturing.

[0024] (2) The internal tensioning structure adopts a linkage group structure, which automatically unfolds when unlocking and automatically folds when locking to allow the pre-tensioning hook and pre-tensioning buckle to cooperate. The user does not need to operate the internal tensioning structure, making it more convenient to use and improving the user experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a locking mechanism with a connecting rod and internal tension, as shown in the embodiment.

[0026] Figure 2 This is an exploded view of a latch with a linkage-type internal tensioning mechanism in one embodiment.

[0027] Figure 3 This is a schematic diagram of the linkage assembly in the embodiment, showing the retracted state when locked.

[0028] Figure 4 This is a schematic diagram of the linkage assembly in the embodiment, showing the unfolded state when unlocked.

[0029] Figure 5 This is a schematic diagram of the latch module in the embodiment, showing the state after the latch is opened and raised.

[0030] Figure 6 This is a partial structural diagram of the embodiment, showing the fully extended state of the linkage assembly when unlocking.

[0031] Figure 7 This is a partial structural diagram of the embodiment, showing the extended state of the linkage assembly when locked but not fully locked.

[0032] Figure 8 This is a schematic diagram of the central locking system in the embodiment.

[0033] Figure 9 This is a schematic diagram illustrating the application of the buckle to a bag in the embodiment.

[0034] Figure label:

[0035] Long shell 1;

[0036] Central locking assembly 2, combination wheel assembly 21, center rod 22, wedge-shaped mating surface 23, unlocking component 24, transmission rod 25, inclined groove 251, lock core 26;

[0037] Fastening assembly 3, fixing seat 31, supporting part 311, locking module 32, locking housing 321, buckle head 322; locking hook module 33, locking seat 331, pre-tightening hook 332, first hook part 3321, second hook part 3322, hook head 333;

[0038] Linkage assembly 4, first swing arm 41, first limiting part 411, second limiting part 412, second swing arm 42, pre-tightening buckle 421, first buckle part 4211, second buckle part 4212, first rotating shaft 43, second rotating shaft 44, elastic element 45. Detailed Implementation

[0039] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0040] This embodiment provides a locking mechanism with a linkage-type internal tensioning mechanism, such as... Figures 1 to 5 As shown, the bag includes a long, narrow housing 1, a central locking assembly 2 arranged separately, and two sets of fastening assemblies 3. The top of the long, narrow housing 1 is open. The central locking assembly 2 is installed in the middle of the long, narrow housing 1, and the two sets of fastening assemblies 3 are respectively installed at both ends of the long, narrow housing 1. The fastening assembly 3 includes a fixing base 31 fixed to one opening side of the bag, a locking module 32 installed on the fixing base 31, and a locking hook module 33 fixed to the other opening side of the bag. A schematic diagram of its connection with the bag is shown below. Figure 9 As shown. The latch module 32 includes a latch housing 321 and a latch head 322 fixed inside the latch housing 321. One end of the latch housing 321 is hinged to the fixed base 31 via a pivot. The lock hook module 33 includes a lock base 331 and a hook head 333, which is movably installed inside the lock base 331. When locked, the latch head 322 is inserted into the lock base 331 and cooperates with the hook head 333 to achieve locking. The central locking group 2 can control the movement of the hook head 333 to release the restriction on the latch head 322 and unlock.

[0041] In this embodiment, a linkage group 4 is also provided on the inner side of the latch housing 321. The linkage group 4 includes a first swing arm 41 and a second swing arm 42. One end of the first swing arm 41 is hinged to the inner side of the latch housing 321 via a first pivot 43. The other end of the first swing arm 41 is hinged to one end of the second swing arm 42 via a second pivot 44. The swing angle of the first swing arm 41 relative to the latch housing 321 and the swing angle of the second swing arm 42 relative to the first swing arm 41 are constrained. The other end of the second swing arm 42 is provided with a pre-tightening buckle 421. The lock seat 331 is provided with a pre-tightening hook 332 that cooperates with the pre-tightening buckle 421. The first pivot 43 and the second pivot 44 are provided with an elastic element 45, which is a torsion spring. The torsion spring applies a spring force to the first swing arm 41 in a direction away from the latch housing 321 and applies a spring force to the second swing arm 42 in a direction away from the first swing arm 41.

[0042] In the locked state where buckle 322 and hook 333 are engaged, such as Figure 3 As shown, the first swing arm 41 and the second swing arm 42 are folded toward the direction of the locking housing 321, and the pre-tightening buckle 421 is locked with the pre-tightening hook 332.

[0043] In the unlocked state where buckle 322 and hook 333 are separated, such as Figures 4 to 6 The elastic element 45 shown drives the first swing arm 41 to swing downward away from the locking housing 321, and the first swing arm 41 and the second swing arm 42 are in a V-shaped unfolded state relative to each other.

[0044] As can be seen from the above, the locking housing 321 is from Figure 6 From the fully erect state to Figure 1 The fully engaged state, the process is as follows: Figure 7 As shown in the diagram, an external force overcomes the elastic force of the elastic element 45 and presses down on the lock housing 321. The first swing arm 41 rotates clockwise toward the inner wall of the lock housing 321, while the second swing arm 42 rotates counterclockwise relative to the top surface of the lock seat 331, and its pre-tightening buckle 421 gradually engages with the pre-tightening hook 332. Similarly, the unlocking process is the opposite.

[0045] In this embodiment, a first limiting part 411 is provided at the hinge end of the first swing arm 41. After the first swing arm 41 rotates to a preset angle, the first limiting part 411 abuts against the inner wall of the locking housing 321 to constrain the swing angle of the first swing arm 41. A second limiting part 412 is provided at the end of the first swing arm 41 away from the hinge end. After the second swing arm 42 rotates to a preset angle, the second limiting part 412 abuts against the second swing arm 42 to constrain the swing angle of the second swing arm 42.

[0046] In this embodiment, a compression spring (not shown in the figure) is provided between the fixed base 31 and the latch housing 321 so that the latch module 32 automatically lifts up after unlocking.

[0047] In this embodiment, the pre-tightening buckle 421 is sheet-shaped and includes a first buckle portion 4211 and a second buckle portion 4212 extending in opposite directions. The pre-tightening hook 332 includes a first hook portion 3321 and a second hook portion 3322.

[0048] In this embodiment, the fixed base 31 extends to have a support portion 311, and the second rotating shaft 44 is located above the support portion 311. It plays a certain supporting role during the locking process, so that the second swing arm 42 is more stably attached to the top surface of the lock base 331, and its pre-tightening buckle 421 is smoothly engaged with the pre-tightening hook 332.

[0049] Regarding the central locking group 2, the structure of the central locking system can be selected from existing technologies. In this embodiment, it is combined with... Figure 8 As shown, the central locking assembly 2 includes a combination wheel assembly 21, a central lever 22, an unlocking element 24, and a transmission rod 25. The transmission rod 25 is slidably installed in the elongated housing 1. One end of the transmission rod 25 is connected to the unlocking element 24, and the other end is driven by the hook 333. That is, the movement of the transmission rod 25 can drive the hook 333 to unlock. The central lever 22 passes through the combination wheel assembly 21 and constrains the unlocking element 24. After the combination wheel assembly 21 rotates to the correct combination, the central lever 22 can move axially to release the constraint on the unlocking element 24. The unlocking element 24 is a button. A wedge-shaped mating surface 23 is provided between the button and the central lever 22. When unlocking, pressing the button downwards pushes the central lever 22 to move axially. The transmission rod 25 is provided with a groove 251, and the button is partially embedded in the groove 251 so that pressing the button with external force drives the transmission rod 25 to move in the vertical direction. The unlocking component 24 is also provided with a lock core 26. The wedge-shaped mating surface 23 is located on the outside of the lock core 26. When the correct key is inserted, the lock core 26 can be rotated, thereby causing the button to be misaligned with the wedge-shaped mating surface 23 of the center rod 22, and the button is released from its limit in the pressing direction.

[0050] It should be noted that this embodiment illustrates the application of the linkage group to the central locking system, but it can also be used for a single locking system.

[0051] In addition, the applicant's earlier Chinese patent application, publication number CN211874189U, discloses a central locking mechanism that uses a linkage structure. However, the locking method of its locking components is quite different from that of this application. The linkage only serves to pop up the lock body, which is completely different from the internal tightening mechanism of this application. It does not provide any technical inspiration for automatic locking and disengagement of the internal tightening mechanism, and therefore does not affect the inventiveness of this application.

[0052] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A linkage-type internal tensioning buckle, comprising a buckling assembly, the buckling assembly including a fixing base fixed to one opening side of a bag, a buckle module mounted on the fixing base, and a hook module fixed to the other opening side of the bag, the buckle module including a buckle housing and a buckle head fixed inside the buckle housing, one end of the buckle housing being hinged to the fixing base; the hook module including a lock seat and a hook head, the hook head being movably mounted inside the lock seat; the buckle head is inserted into the lock seat and engages with the hook head to lock; characterized in that: The inner side of the lock housing is also provided with a linkage assembly, which includes a first swing arm and a second swing arm. One end of the first swing arm is hinged to the inner side of the lock housing via a first pivot, and the other end of the first swing arm is hinged to one end of the second swing arm via a second pivot. The swing angle of the first swing arm relative to the lock housing and the swing angle of the second swing arm relative to the first swing arm are constrained. The other end of the second swing arm is provided with a pre-tightening buckle, and the lock seat is provided with a pre-tightening hook that cooperates with the pre-tightening buckle. The first pivot and the second pivot are provided with elastic elements. The hinge end of the first swing arm is provided with a first limiting part. After the first swing arm rotates to a preset angle, the first limiting part abuts against the inner wall of the lock housing to constrain the swing angle of the first swing arm. The end of the first swing arm away from the hinge end is provided with a second limiting part. After the second swing arm rotates to a preset angle, the second limiting part abuts against the second swing arm to constrain the swing angle of the second swing arm. In the unlocked state where the buckle and hook are separated, the elastic element drives the first swing arm to swing downward away from the buckle housing, and the first and second swing arms are in a V-shaped unfolded state relative to each other. In the locked state where the buckle and hook are engaged, the first and second swing arms fold towards the lock housing, and the pre-tightening buckle and pre-tightening hook are locked together.

2. The latch with linkage-type internal tensioning according to claim 1, characterized in that: The elastic element is a torsion spring, which applies a spring force to the first swing arm in a direction away from the locking housing, and applies a spring force to the second swing arm in a direction away from the first swing arm.

3. The latch with linkage-type internal tensioning according to claim 1, characterized in that: A compression spring is provided between the fixed base and the lock housing so that the lock module automatically lifts up after unlocking.

4. The latch with linkage-type internal tensioning according to claim 1, characterized in that: The pre-tightening buckle is sheet-shaped and includes a first buckle part and a second buckle part. The pre-tightening hook correspondingly includes a first hook part and a second hook part.

5. A latch with a connecting rod and internal tensioning as described in claim 1, characterized in that: The fixed base extends to have a support portion, and the second rotating shaft is located above the support portion.

6. A latch with a connecting rod and internal tensioning as described in claim 1, characterized in that: It also includes a central locking assembly and a long housing. The central locking assembly is installed in the middle of the long housing, and two sets of fastening components are installed at the two ends of the long housing. The central locking assembly can control the movement of the hook to release the limit on the buckle and unlock.

7. A latch with a connecting rod and internal tensioning as described in claim 6, characterized in that: The central locking system includes a combination wheel assembly, a center rod, an unlocking mechanism, and a transmission rod. The transmission rod is slidably installed in the elongated housing. One end of the transmission rod is connected to the unlocking mechanism, and the other end is connected to the hook drive. The center rod passes through the combination wheel assembly and constrains the unlocking mechanism. Only after the combination wheel assembly rotates to the correct combination can the center rod move axially and release the constraint on the unlocking mechanism.

8. A latch with a connecting rod and internal tensioning as described in claim 7, characterized in that: The unlocking component is a button, and there is a wedge-shaped mating surface between the button and the center rod. The transmission rod is provided with an inclined groove, and the button is partially embedded in the inclined groove so that when an external force presses the button, it drives the transmission rod to move in the vertical direction.

9. A latch with a connecting rod and internal tensioning as described in claim 7, characterized in that: The unlocking mechanism also includes a lock cylinder. Inserting the correct key will rotate the lock cylinder, thereby causing the button and the wedge-shaped mating surface of the center rod to be misaligned.

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