A combination lock that is easy to assemble

Abstract

The utility model belongs to the technical field of lockset, specifically disclose a password lock convenient to assemble, be equipped with the connecting rope on the fixed base, the one end of connecting rope away from fixed base is equipped with the buckle head, the lock shell is equipped with the accommodating cavity of opening, install the pressing mechanism in the accommodating cavity, the mounting seat is equipped with the accommodating groove, install the password mechanism in the accommodating groove, and the mounting seat can be placed in the accommodating cavity, the password mechanism can be extruded through the pressing mechanism, to make the buckle head can pass through the through -hole of lock shell lateral wall, and with the pressing mechanism interlocking or each other is separated. Install the pressing mechanism and password mechanism respectively in the accommodating cavity of lock shell, the accommodating groove of mounting seat, thereby can separate installation, need not operate simultaneously. Moreover, can install the password mechanism on the mounting seat after installing well, then the mounting seat is placed into the accommodating cavity of lock shell, it is convenient to assemble, thereby can improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a combination lock that is easy to assemble. Background Technology

[0002] In the prior art, such as the utility model patent with publication number CN213510010U, a convenient combination lock is specifically disclosed. According to its disclosure, a combination toggle mechanism is installed inside the lock housing. The combination toggle mechanism includes a sliding shaft disposed inside the lock housing, a bushing installed along the axial direction of the sliding shaft, a dial sleeved outside the bushing, a protrusion installed at the end of the sliding shaft away from the bushing, a positioning spring installed at one end of the dial, and a second spring installed between the protrusion and the bushing. Strip-shaped protrusions are evenly distributed circumferentially on the outside of the bushing. A groove matching the strip-shaped protrusions on the outside of the dial is opened inside the dial. An arc-shaped groove for the movement of a steel ball is opened on the protrusion. A key block is fixedly installed along the axial direction of the sliding shaft. A through groove matching the key block is opened inside the bushing.

[0003] When the dial is adjusted to the correct combination, the protrusion moves relative to the dial with the sliding shaft, causing the steel ball to move from the ball groove in the lock housing to the arc-shaped groove on the protrusion. This disengages the steel ball from the lock lever, ultimately disengaging the lock lever from the lock housing and unlocking the lock. Afterward, the first spring presses against the ejector, and the ejector and protrusion retain the steel ball in the ball groove.

[0004] The aforementioned combination locks present assembly difficulties during production and practical application.

[0005] First, the second spring, bushing, and dial need to be fitted onto the sliding shaft, so that the key blocks on the axial direction of the sliding shaft correspond one-to-one with the through grooves on the inner side of the bushing. At this point, the numbers on the dial are the correct password. Since the steel ball is movable, during the installation process, the steel ball needs to be fixed in place by the protrusion and ejector integrated with the sliding shaft, so that the password dialing mechanism can be assembled inside the lock case. However, due to the large number of parts and the small space inside the lock case, workers often overlook certain parts during assembly, causing the steel ball to easily fall out. This process is time-consuming, troublesome, and has low production efficiency. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a combination lock that is easy to assemble, solving the problems of troublesome assembly and low production efficiency.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a combination lock that is easy to assemble, comprising...

[0008] A fixing base, wherein a connecting rope is provided on the fixing base, and a buckle is provided at the end of the connecting rope away from the fixing base;

[0009] A lock housing, wherein the lock housing has an open receiving cavity and a pressing mechanism is installed in the receiving cavity;

[0010] The mounting base has a receiving groove, in which a password mechanism is installed, and the mounting base is placed inside the receiving cavity;

[0011] The key mechanism can be pressed by the pressing mechanism so that the buckle can pass through the through hole in the side wall of the lock case and lock or disengage from the pressing mechanism.

[0012] As a further embodiment, the password mechanism includes a push rod, a first spring, several bushings, and a number of password wheels matching the number of bushings. One end of the push rod is engaged with a slot at one end of a receiving groove via a protrusion, and the other end of the push rod is installed in a mounting hole in the end wall of the other end of the receiving groove. The first spring and several bushings are sequentially sleeved on the push rod, with the first spring close to the protrusion. The password wheels are sleeved on the bushings, and the password wheels and bushings are toothed to each other. The push rod is provided with a number of key blocks spaced along the axial direction matching the number of bushings. The inner wall of the bushing is provided with a through groove through which the key blocks can pass, so that the pressing mechanism can squeeze the protrusion.

[0013] As a further embodiment, the cryptographic mechanism further includes a gasket and a code-changing component. The gasket is fitted onto the push rod and located between the first spring and the bushing. One end of the code-changing component is fitted onto the push rod and located between the bushing and the end wall of the other end of the receiving groove. The other end of the code-changing component can be engaged with a locking position A or a locking position B at the bottom of the receiving groove. Locking position A and locking position B are connected. Locking position A corresponds to the straight line where the push rod is located, and locking position B is offset from the straight line where the push rod is located. In the direction of the straight line where the push rod is located, the distance from locking position A to the bushing is greater than the distance from locking position B to the bushing.

[0014] Alternatively, a socket may be provided below the mounting hole, the position of which corresponds to the position of the code-changing component.

[0015] As a further embodiment, at least two sets of spaced-apart limiting protrusions are provided on the inner walls of both sides of the receiving groove, and the password wheel is located between at least two sets of the limiting protrusions.

[0016] As a further embodiment, the bottom of the receiving groove is provided with an observation window, and the side wall of the bushing is provided with a limiting protrusion ring. The limiting protrusion ring is provided with a marking part, which can be viewed through the observation window so that the key block corresponds to the through groove.

[0017] As a further embodiment, one side of the observation window is provided with positioning springs that are the same number as the number of password wheels. The circumference of the password wheels is provided with multiple positioning grooves, and one end of the positioning spring can be locked in the positioning groove.

[0018] As a further embodiment, the pressing mechanism includes a button and a second spring. The receiving cavity is provided with a first placement groove for placing the button and the second spring. The first placement groove is close to the through hole. One end of the second spring abuts against the button, and the other end of the second spring abuts against the inner wall of the receiving cavity. One end of the button passes through the side wall of the lock case, and the other end of the button is provided with a pressing block. The pressing block can press the protrusion so that the buckle can pass through the through hole of the side wall of the lock case and the locking hole on the button in sequence. The buckle is provided with an annular locking groove, which locks or disengages from the locking hole.

[0019] As a further option,

[0020] The locking hole is a gourd-shaped hole with a large hole and a small hole communicating with each other. The small hole is close to the second spring, and the large hole is far away from the second spring.

[0021] A sliding groove is provided between the button and the pressing block to match the side wall of the first placement groove;

[0022] The end of the button that passes through the side wall of the lock case is fitted with a protective cap.

[0023] As a further embodiment, the combination lock also includes an ejection mechanism. The receiving cavity is provided with a second placement slot for placing the ejection mechanism. The second placement slot communicates with the first placement slot. The ejection mechanism includes an ejector and a third spring. The ejector is a cylindrical structure and can correspond to the locking hole and the through hole. One end of the third spring is placed inside the ejector, and the other end of the third spring abuts against the inner wall of the second placement slot. The pressing block can abut against the outer wall of the second placement slot.

[0024] As a further embodiment, the lock housing has a number of openings matching the number of combination wheels. When the mounting base is placed in the receiving cavity, a portion of the combination wheels passes through the openings and protrudes outside the lock housing.

[0025] The beneficial effects of this utility model are: the pressing mechanism and the combination mechanism are installed separately in the receiving cavity of the lock case and the receiving groove of the mounting base, respectively, so that they can be installed separately without simultaneous operation. Moreover, the combination mechanism can be installed on the mounting base before the mounting base is placed into the receiving cavity of the lock case, which increases the operator's working space, improves operating efficiency, facilitates assembly, and thus improves production efficiency. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram (I) of an embodiment of the present utility model;

[0027] Figure 2 This is a three-dimensional structural diagram (I) of an embodiment of the present utility model (with the fixing base and connecting rope removed);

[0028] Figure 3 This is a three-dimensional structural diagram (II) of an embodiment of the present utility model (with the fixing base and connecting rope removed);

[0029] Figure 4 This is a three-dimensional structural diagram (three) of an embodiment of the present utility model (with the fixing base and connecting rope removed);

[0030] Figure 5 This is a three-dimensional structural diagram (fourth) of an embodiment of the present utility model (with the fixing base and connecting rope removed, and the back cover opened);

[0031] Figure 6 This is a three-dimensional exploded view (first) of an embodiment of the present utility model;

[0032] Figure 7 This is a three-dimensional exploded view (II) of an embodiment of the present utility model;

[0033] Figure 8 This is an exploded view of the cryptographic mechanism in an embodiment of this utility model;

[0034] Figure 9 This is a perspective view of the bushing in an embodiment of the present utility model;

[0035] Figure 10 This is a schematic diagram of the structure of the button and the squeezing block in an embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the button and the squeezing block in an embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram (one) illustrating the application of an embodiment of the present utility model.

[0038] Figure 13 This is a schematic diagram (II) illustrating the application of an embodiment of this utility model.

[0039] In the diagram, 1-fixed base, 11-connecting rope, 12-buckle, 121-annular groove, 2-lock housing, 21-receiving cavity, 211-first placement groove, 212-second placement groove, 213-through hole, 214-perforation, 215-opening, 3-rear cover, 31-limiting plate, 32-first positioning plate, 33-second positioning plate, 34-third positioning plate, 4-pressing mechanism, 41-button, 411-locking hole, 4111-large hole, 4112-small hole, 412-slide groove, 413-protrusion, 42-protective cap, 43-second spring, 44 - Extrusion block, 441- Arc surface, 5- Mounting base, 51- Receiving groove, 52- Limiting protrusion, 53- Observation window, 531- Positioning spring, 54- Mounting hole, 55- Locking position A, 56- Locking position B, 57- Insertion hole, 6- Password mechanism, 61- Push rod, 611- Key block, 62- First spring, 63- Bushing, 631- Limiting protrusion ring, 632- Marking part, 633- Through groove, 64- Password wheel, 641- Positioning groove, 65- Protrusion, 66- Gasket, 67- Changing code part, 7- Ejection mechanism, 71- Ejection part, 72- Third spring. Detailed Implementation

[0040] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] It should be noted that the combination lock of this utility model can be applied between two parts that need to be opened and closed, such as windows, drawers, toilets, washing machines, refrigerators, etc. For example, the fixing base 1 can be fixed to the window sash with screws or double-sided tape, and the lock shell 2 can be fixed to the window frame with screws or double-sided tape; conversely, the fixing base 1 can also be fixed to the window frame with screws or double-sided tape, and the lock shell 2 can be fixed to the window sash with screws or double-sided tape.

[0042] As attached Figure 1-4 As shown, this utility model provides a combination lock that is easy to assemble, including...

[0043] A fixing base 1 is provided, on which a connecting rope 11 is installed. A buckle 12 is provided at one end of the connecting rope 11 away from the fixing base 1. Specifically, a locking block can be provided at the other end of the connecting rope 11, thereby confining the other end of the connecting rope 11 within the fixing base 1. By opening the rear cover of the fixing base 1, the other end of the connecting rope 11 can be easily passed through the outer shell of the fixing base 1 and then connected to the locking block, so that the other end of the connecting rope 11 is installed in the inner cavity of the fixing base 1.

[0044] Specifically, the connecting rope 11 can be made of a rope that is not easily broken, such as a steel rope. Its function is to connect the fixing seat 1 and the lock housing 2, thereby allowing the two parts to be separated or not separated. At the same time, the connecting rope 11 can also allow the two parts to open to a certain degree, such as between the window sash and the window frame, which is conducive to ventilation without being fully opened or closed.

[0045] The lock housing 2 has an integrally formed receiving cavity 21 with an opening. A pressing mechanism 4 is installed in the receiving cavity 21, and a back cover 3 is provided at the opening. Specifically, a threaded post can be integrally formed in the receiving cavity 21. By connecting the back cover 3 to the threaded post with a screw, the back cover 3 can be fixed at the opening of the receiving cavity 21.

[0046] Mounting base 5 has a receiving groove 51, in which a password mechanism 6 is installed. Mounting base 5 is placed within receiving cavity 21. The password mechanism 6 can be installed in the receiving groove 51 of mounting base 5 first, and then mounting base 5 can be placed within receiving cavity 21. Specifically, a corresponding limiting structure can be integrally formed in receiving cavity 21 to limit the mounting base 5. For example, the aforementioned threaded post, in conjunction with the integrally formed limiting recess on mounting base 5, can limit the mounting base 5 and prevent it from shifting during use.

[0047] In this invention, the pressing mechanism 4 and the combination mechanism 6 are respectively installed in the receiving cavity 21 of the lock housing 2 and the receiving groove 51 of the mounting base 5, allowing for separate installation without simultaneous operation. Furthermore, the combination mechanism 6 can be installed on the mounting base 5 before the mounting base 5 is placed into the receiving cavity 21 of the lock housing 2, thus increasing the worker's operating space, improving efficiency, and facilitating assembly, thereby increasing production efficiency. When the combination mechanism 6 is set to the correct combination, it can be pressed by the pressing mechanism 4, allowing the buckle 12 to pass through the through hole 213 on the side wall of the lock housing 2 and lock or disengage from the pressing mechanism 4, thereby achieving the function of locking or unlocking the combination lock.

[0048] As one implementation method, see attached Figure 7-8As shown, the password mechanism 6 includes a push rod 61, a first spring 62, several bushings 63, and a number of password wheels 64 matching the number of bushings 63. One end of the push rod 61 is engaged with the end wall of one end of the receiving groove 51 via a protrusion 65. The push rod 61 and the protrusion 65 are integrally formed. The other end of the push rod 61 is installed in the mounting hole 54 of the end wall of the other end of the receiving groove 51. The first spring 62 and several bushings 63 are sequentially sleeved on the push rod 61, with the first spring 62 close to the protrusion 65. The password wheels 64 are sleeved on the bushings 63, and the password wheels 64 and bushings 63 are toothed to each other. The push rod 61 has key blocks 611 spaced at intervals along the axial direction, with the number matching the number of bushings 63. The inner wall of the bushing 63 has through grooves 633 through which the key blocks 611 can pass, so that the pressing mechanism 4 can press the protrusion 65. When multiple key blocks 611 are provided, the distance between adjacent key blocks 611 is equal, and the multiple key blocks 611 are aligned in a straight line.

[0049] Specifically, the first spring 62 can reset the protrusion 65. A toothed block is provided on the circumferential surface of the bushing 63, and a toothed groove is provided on the inner wall of the code wheel 64. When the code wheel 64 is fitted onto the bushing 63, the toothed block corresponds to the toothed groove, so that when the code wheel 64 is turned, it will drive the bushing 63, thereby aligning the through groove 633 on the inner wall of the bushing 63 with the key block 611 on the push rod 61.

[0050] First, a first spring 62 and several bushings 63 are fitted onto the push rod 61. Then, a combination wheel 64 is fitted onto the bushings 63. Next, one end of the push rod 61 is engaged with a slot at one end of the receiving groove 51 via a protrusion 65. The other end of the push rod 61 is installed in the mounting hole 54 on the end wall of the receiving groove 51. This assembly method is relatively simple and easy, and convenient for assembly personnel. When the combination wheel 64 is turned to the correct combination, and the key block 611 on the push rod 61 aligns with the through groove 633 on the inner wall of the bushing 63, the protrusion 65 can be squeezed by the pressing mechanism 4. The protrusion 65 can then move closer to the bushing 63, thus disengaging the buckle 12 from the pressing mechanism 4 and unlocking the combination lock. Alternatively, the buckle 12 can be passed through the through hole 213 on the side wall of the lock case 2 and then engaged with the pressing mechanism 4. After releasing the pressing mechanism 4, the combination wheel 64 can be scrambled, thus locking the combination lock.

[0051] Meanwhile, as attached Figure 8 As shown, the number of combination wheels 64 can be set as needed; it can be 4, 3, 2, or 1. The more combination wheels 64 there are, the more complex the combination, and the harder the lock is to open. Each combination wheel 64 has 10 numbers from 0 to 9 on its circumference, and the combination can be adjusted to the correct combination by moving the combination wheels.

[0052] Additionally, as attached Figure 7-8As shown, the password mechanism 6 also includes a gasket 66 and a code-changing component 67. The gasket 66 is fitted onto the push rod 61 and located between the first spring 62 and the bushing 63, which can reduce the friction between the first spring 62 and the bushing 63 and reduce the wear of the bushing 63. One end of the code-changing component 67 is fitted onto the push rod 61 and located between the bushing 63 and the end wall of the other end of the receiving groove 51. The other end of the code-changing component 67 can be engaged with the locking position A55 or locking position B56 at the bottom of the receiving groove 51. The locking position A55 and the locking position B56 are connected. The locking position A55 corresponds to the straight line where the push rod 61 is located, and the locking position B56 is offset from the straight line where the push rod 61 is located. In the direction of the straight line where the push rod 61 is located, the distance from the locking position A55 to the bushing 63 is greater than the distance from the locking position B56 to the bushing 63.

[0053] The principle behind the manufacturer's unified change of the initial password: Under normal circumstances, the other end of the password changer 67 is engaged in slot A55. When the initial password needs to be changed, since the current password is correct, the other end of the password changer 67 is moved to slot B56. At this time, the key block 611 of the push rod 61 corresponds to the through groove 633 of the bushing 63 on a straight line and is located on the same straight line. Since the distance from slot A55 to bushing 63 is greater than the distance from slot B56 to bushing 63, the password changer 67 will push the bushing 63 towards the protrusion 65 and compress the first spring 62. At this time, the key block 611 of the push rod 61... 1. Within the through groove 633 of the bushing 63, the bushing 63 cannot rotate, and the combination wheel 64 remains in its original position. However, at this time, the combination wheel 64 disengages from the bushing 63 and can be moved to a new combination. Then, the other end of the code-changing component 67 is moved to the locking position A55, the bushing 63 moves away from the protrusion 65 and resets, and the combination wheel 64 engages with the bushing 63. At this time, the key block 611 of the push rod 61 disengages from the through groove 633 of the bushing 63, and the new combination is the factory default combination. This facilitates the modification of the factory default combination without requiring prolonged pressing of the code-changing component 67, saving effort and allowing for a unified adjustment of the factory default combination.

[0054] To facilitate users changing their passwords, please see the attached document. Figure 7 Appendix Figure 8As shown, a socket 57 can be made below the mounting hole 54. The position of the socket 57 corresponds to the position of the code-changing component 67. A pin can be inserted into the socket 57, so that the pin can push against the code-changing component 67, thereby causing the code-changing component 67 to push the bushing 63 towards the protrusion 65 and compress the first spring 62. If the code is correct, the code can also be changed according to the principle described above. However, this method requires the pin to be kept pushing against the code-changing component 67, and the mounting base 5 and the code mechanism 6 need to be removed from the lock case 2. Alternatively, a through hole 214 can be made on the side wall of the lock case 2, with the position of the through hole 214 corresponding to the position of the socket 57. A pin can be inserted into the through hole 214 and then the socket 57 in sequence, so that the pin can push against the code-changing component 67. Similarly, according to the principle described above, the code can also be changed. This method does not require removing the mounting base 5 and the code mechanism 6 from the lock case 2. (See attached diagram) Figure 6-8 As shown, a third positioning plate 34 is provided on the rear cover 3. The third positioning plate 34 can fix the other end of the code changer 67, so that it can only move along the axis of the push rod 61. In this way, the other end of the code changer 67 will not move from the locking position A55 to the locking position B56.

[0055] It should be noted that the password mechanism 6 can be selected as needed, as long as it can enable the pressing mechanism 4 to squeeze the protrusion 65.

[0056] Similarly, as attached Figure 8 As shown, at least two sets of spaced-apart limiting protrusions 52 are provided on the inner walls of both sides of the receiving groove 51, and the code wheel 64 is located between the at least two sets of limiting protrusions 52. The two sets of limiting protrusions 52 limit the code wheel 64, reducing the problem of the code wheel 64 disengaging from the bushing 63 due to shaking during the process of being turned.

[0057] In some embodiments, when a user forgets their password, they need to open the back cover 3 and remove the mounting bracket 5, as shown in the attached document. Figure 6 As shown, the bottom of the receiving groove 51 is provided with an observation window 53, and the side wall of the bushing 63 is provided with a limiting protrusion 631, as shown in the attached figure. Figure 9 As shown, the limiting protrusion 631 has a marking portion 632. The marking portion 632 can be a rectangular plane on the limiting protrusion 631. Setting the limiting protrusion 631 allows for gaps between two or more combination wheels 64. Thus, the marking portion 632 can be seen through the observation window 53 and the gaps. Since the push rod 61 does not rotate, turning the combination wheel 64 drives the bushing 63. Through the observation window 53, it can be seen that the marking portion 632 or the marking portions 632 of several bushings 63 are aligned in a straight line. That is, when the through groove 633 of the bushing 63 is adjusted to correspond to the key block 611 on the push rod 61, it proves that the combination wheel 64 has been turned to the current correct combination, making it convenient for the user to find the current correct combination if they forget it.

[0058] As a further improvement, see attached Figure 6 , 8 As shown, a number of positioning springs 531, matching the number of combination wheels 64, are integrally formed on one side of the observation window 53. Multiple positioning grooves 641 are provided on the circumferential surface of the combination wheels 64, and one end of each positioning spring 531 can be engaged within a positioning groove 641. This allows for rhythmic movement of the combination wheels 64 when they are turned, and the engagement of one end of each positioning spring 531 within a positioning groove 641 produces a sound, facilitating precise positioning of the combination wheels 64 by the operator.

[0059] In this embodiment, as shown in the appendix Figure 6 As shown, the pressing mechanism 4 includes a button 41 and a second spring 43. A first placement groove 211 for placing the button 41 and the second spring 43 is provided in the receiving cavity 21. The first placement groove 211 is close to the through hole 213. One end of the second spring 43 abuts against the button 41 (a protrusion 413 can be provided on the button 41, and the second spring 43 can be sleeved and fixed to the protrusion 413 to prevent the second spring 43 from detaching from the button 41, thus improving the overall integrity). The other end of the second spring 43 abuts against the inner wall of the receiving cavity 21. One end of the button 41 passes through the side wall of the lock housing 2 and... Button 41 abuts against the inner wall of receiving cavity 21. The other end of button 41 is provided with extrusion block 44. Extrusion block 44 is integrally formed with button 41 and is located outside the first placement groove 211. Extrusion block 44 can extrude protrusion 65 (the parts where extrusion block 44 and protrusion 65 abut against each other are arc surfaces, which can reduce friction and resistance) so that buckle 12 can pass through through hole 213 on side wall of lock shell 2 and locking hole 411 on button 41 in sequence. An annular locking groove 121 is provided on buckle 12. The annular locking groove 121 and locking hole 411 lock or disengage from each other.

[0060] Specifically, when the combination mechanism 6 is set to the correct combination, manually pressing the button 41 through one end of the side wall of the lock housing 2 causes the pressing block 44 to press the protrusion 65 closer to the bushing 63. This allows the buckle 12 to pass through the through hole 213 in the side wall of the lock housing 2 and the locking hole 411 on the button 41 in sequence. After releasing the pressing hand, the button 41 returns to its original position under the action of the second spring 43, causing the annular groove 121 to lock into place with the locking hole 411, thus locking the buckle 12. The combination lock is locked when the combination wheel 64 is scrambled. Conversely, when the combination mechanism 6 is set to the correct combination, manually pressing the button 41, which passes through one end of the lock housing 2, causes the pressing block 44 to press the protrusion 65 towards the bushing 63, aligning the through hole 213 with the locking hole 411. Simultaneously, the annular groove 121 disengages from the locking hole 411, and the buckle 12 sequentially leaves the locking hole 411 on the button 41 and the through hole 213 on the side wall of the lock housing 2, thus unlocking the combination lock. This pressing mechanism 4 operates smoothly. The buckle 12 is easy to release during unlocking and is securely locked during locking, as shown in the attached diagram. Figure 12 As shown. Furthermore, the pressing mechanism 4 uses fewer parts and has a simpler structure, making it easier to assemble.

[0061] Some of the embodiments are as follows, as shown in the appendix. Figure 10 , 11 As shown, the locking hole 411 is a gourd-shaped hole with a large hole 4111 and a small hole 4112 communicating with each other. The small hole 4112 is close to the second spring 43, and the large hole 4111 is far away from the second spring 43. As mentioned above, when the combination lock is locked, the small hole 4112 of the gourd-shaped hole is locked with the annular groove 121 of the buckle 12. When the combination lock is to be unlocked, the button 41 is pressed, so that the large hole 4111 of the locking hole is aligned with the annular groove 121 of the buckle 12, and the annular groove 121 is disengaged from the locking hole 411. At this time, the buckle 12 is loose and can be disengaged from the button 41.

[0062] Of course, due to location reasons, as shown in the attached document Figure 10 As shown, a sliding groove 412 is provided between the button 41 and the pressing block 44 to cooperate with the side wall of the first placement groove 211. This facilitates pressing the button 41 and also guides the button 41 so that it can only move back and forth in one direction.

[0063] Furthermore, as attached Figure 2 As shown, a protective cap 42 is fitted on the end of button 41 that passes through the side wall of lock housing 2. When pressing the end of button 41 that passes through the side wall of lock housing 2, the protective cap 42 can increase the pressing area, reduce finger pain caused by the small force area, and make it easier to press button 41.

[0064] Similarly, the pressing mechanism 4 can be selected as needed, as long as it can press and squeeze the protrusion 65 to disengage the buckle 12 from the pressing mechanism 4.

[0065] In some embodiments, as shown in the appendix Figure 6 As shown, the combination lock also includes an ejection mechanism 7. The receiving cavity 21 has a second placement slot 212 for housing the ejection mechanism 7. The second placement slot 212 communicates with the first placement slot 211. The ejection mechanism 7 includes an ejector 71 and a third spring 72. The ejector 71 has a cylindrical structure and corresponds to the locking hole 411 and the through hole 213. One end of the third spring 72 is placed inside the ejector 71, and the other end of the third spring 72 abuts against the inner wall of the second placement slot 212. Thus, when the combination mechanism 6 is turned to the correct combination, as shown in the attached diagram... Figure 12 , 13 As shown, by manually pressing the button 41 through one end of the side wall of the lock case 2, the pressing block 44 can press the protrusion 65 closer to the bushing 63, so that the annular groove 121 and the locking hole 411 can be disengaged. At this time, the ejector 71 corresponds to the locking hole 411 and the through hole 213. Under the action of the third spring 72, the ejector 71 automatically pushes the buckle 12 out of the through hole 213, and the combination lock is unlocked, saving the manual action of pulling out the buckle 12.

[0066] A first limiting protrusion (not shown in the figure) can be integrally formed on the bottom of the ejector 71, and a second limiting protrusion (not shown in the figure) can be integrally formed on the second placement groove 212 near the first placement groove 211 to restrict the movement of the first limiting protrusion. In this way, when the locking hole 411 corresponds to the through hole 213, after the ejector 71 pushes the buckle 12 out of the through hole 213, the second limiting protrusion presses against the first limiting protrusion, and the third spring 72 will not push the ejector 71 out of the second placement groove 212.

[0067] Among them, as attached Figure 6 , 10 As shown in Figure 11, the pressing block 44 can abut against the outer wall of the second placement groove 212, and also plays a role in stabilizing and limiting the button 41, preventing it from coming out of the second placement groove 212.

[0068] As attached Figure 7As shown, a limiting plate 31, a first positioning plate 32, and a second positioning plate 33 are respectively provided on the rear cover 3. After the rear cover 3 is connected to the threaded post by screws passing through it, the rear cover 3 can be fixed at the opening of the receiving cavity 21. At this time, the limiting plate 31 and the first positioning plate 32 are close to the pressing mechanism 4 and the ejection mechanism 7 in sequence. The limiting plate 31 plays a limiting role on the button 41, which can limit the pressing stroke of the button 41 and ensure that the through hole 213 and the large hole 4111 of the locking hole 411 are accurately aligned each time the button 41 is pressed, which is convenient for removing the buckle 12 and also convenient for the ejection mechanism 7 to push the buckle 12 out of the through hole 213. The first positioning plate 32 can fix the ejection mechanism 7 to prevent the ejection mechanism 7 from loosening from the second placement groove 212. The second positioning plate 33 is used to fix the password mechanism 6 to prevent the password mechanism 6 from loosening.

[0069] As attached Figure 3 , 7 As shown, the lock housing 2 has a number of openings 215 that are the same as the number of combination wheels 64. When the mounting base 5 is placed in the receiving cavity 21, a part of the combination wheel 64 passes through the opening 215 and protrudes outside the lock housing 2, which makes it easy to turn the combination wheel 64.

[0070] A brief description of the working principle of this utility model: as shown in the attached document. Figure 13 As shown, when the combination wheel 64 is turned to the correct combination, manually pressing the button 41 through one end of the side wall of the lock housing 2 causes the pressing block 44 to press the protrusion 65 closer to the bushing 63. This allows the annular groove 121 to disengage from the locking hole 411, and the buckle 12 is released sequentially from the locking hole 411 on the button 41 and the through hole 213 on the side wall of the lock housing 2, thus unlocking the combination lock. When locking the combination lock, the combination mechanism 6 is turned to the correct combination. Manually pressing the button 41 through one end of the side wall of the lock housing 2 causes the pressing block 44 to press the protrusion 65 closer to the bushing 63. This allows the buckle 12 to pass sequentially from the through hole 213 on the side wall of the lock housing 2 and the locking hole 411 on the button 41. After releasing the pressing hand, the button 41 returns to its original position under the action of the second spring 43, causing the annular groove 121 to lock into place with the locking hole 411. Figure 12 As shown, then scramble the combination on wheel 64, and the combination lock will be locked.

[0071] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A combination lock that is easy to assemble, characterized in that: include A fixed base (1) is provided with a connecting rope (11), and a buckle (12) is provided at one end of the connecting rope (11) away from the fixed base (1). Lock housing (2), the lock housing (2) is provided with an open receiving cavity (21), and a pressing mechanism (4) is installed in the receiving cavity (21); Mounting base (5), the mounting base (5) is provided with a receiving groove (51), a password mechanism (6) is installed in the receiving groove (51), and the mounting base (5) is placed in the receiving cavity (21); The key mechanism (6) can be squeezed by the pressing mechanism (4) so ​​that the buckle (12) can pass through the through hole (213) on the side wall of the lock case (2) and lock or disengage from the pressing mechanism (4).

2. The easy-to-assemble combination lock according to claim 1, characterized in that: The cryptographic mechanism (6) includes a push rod (61), a first spring (62), several bushings (63), and a number of cryptographic wheels (64) matching the number of bushings (63). One end of the push rod (61) is engaged with a slot at one end of the receiving groove (51) via a protrusion (65), and the other end of the push rod (61) is installed in a mounting hole (54) on the end wall of the receiving groove (51) at the other end. The first spring (62) and several bushings (63) are sequentially sleeved on the push rod (61). 1) On the top, and the first spring (62) is close to the protrusion (65), the password wheel (64) is sleeved on the bushing (63), and the password wheel (64) and the bushing (63) are toothed to each other. The push rod (61) is provided with a number of key blocks (611) at intervals along the axial direction that are the same as those of the bushing (63). The inner wall of the bushing (63) is provided with a through groove (633) through which the key blocks (611) can pass, so that the pressing mechanism (4) can squeeze the protrusion (65).

3. The easy-to-assemble combination lock according to claim 2, characterized in that: The password mechanism (6) further includes a gasket (66) and a code-changing component (67). The gasket (66) is sleeved on the push rod (61) and located between the first spring (62) and the bushing (63). One end of the code-changing component (67) is sleeved on the push rod (61) and located between the bushing (63) and the end wall of the other end of the receiving groove (51). The other end of the code-changing component (67) can be engaged with the locking position A (55) or locking position B (56) at the bottom of the receiving groove (51). The locking position A (55) and the locking position B (56) are connected. The locking position A (55) corresponds to the straight line where the push rod (61) is located. The locking position B (56) is offset from the straight line where the push rod (61) is located. In the direction of the straight line where the push rod (61) is located, the distance from the locking position A (55) to the bushing (63) is greater than the distance from the locking position B (56) to the bushing (63). Alternatively, a socket (57) may be provided below the mounting hole (54), the position of which corresponds to the position of the code changer (67).

4. A combination lock that is easy to assemble according to claim 2, characterized in that: At least two sets of spaced limiting protrusions (52) are provided on the inner walls of both sides of the receiving groove (51), and the password wheel (64) is located between at least two sets of the limiting protrusions (52).

5. A combination lock that is easy to assemble according to claim 2, characterized in that: The bottom of the receiving groove (51) is provided with an observation window (53), and the side wall of the bushing (63) is provided with a limiting protrusion (631). The limiting protrusion (631) is provided with a marking part (632). The marking part (632) can be viewed through the observation window (53) so that the key block (611) corresponds to the through groove (633).

6. A combination lock that is easy to assemble according to claim 5, characterized in that: The observation window (53) has a number of positioning springs (531) on one side that are the same as the number of password wheels (64). The password wheels (64) have multiple positioning grooves (641) on their circumference. One end of the positioning spring (531) can be locked in the positioning groove (641).

7. A combination lock that is easy to assemble according to claim 2, characterized in that: The pressing mechanism (4) includes a button (41) and a second spring (43). The receiving cavity (21) is provided with a first placement groove (211) for placing the button (41) and the second spring (43). The first placement groove (211) is close to the through hole (213). One end of the second spring (43) abuts against the button (41), and the other end of the second spring (43) abuts against the inner wall of the receiving cavity (21). One end of the button (41) passes through the side wall of the lock shell (2), and the other end of the button (41) is provided with a pressing block (44). The pressing block (44) can press the protrusion (65) so that the buckle (12) can pass through the through hole (213) of the side wall of the lock shell (2) and the locking hole (411) on the button (41) in sequence. The buckle (12) is provided with an annular locking groove (121). The annular locking groove (121) and the locking hole (411) are locked or disengaged from each other.

8. A combination lock that is easy to assemble according to claim 7, characterized in that: The locking hole (411) is a gourd-shaped hole with a large hole (4111) and a small hole (4112) communicating with each other. The small hole (4112) is close to the second spring (43), and the large hole (4111) is far away from the second spring (43). A sliding groove (412) is provided between the button (41) and the pressing block (44) to cooperate with the side wall of the first placement groove (211). The button (41) has a protective cap (42) fitted onto one end of the button (41) that passes through the side wall of the lock case (2).

9. A combination lock that is easy to assemble according to claim 7, characterized in that: The combination lock also includes an ejection mechanism (7). The receiving cavity (21) is provided with a second placement groove (212) for placing the ejection mechanism (7). The second placement groove (212) is connected to the first placement groove (211). The ejection mechanism (7) includes an ejector (71) and a third spring (72). The ejector (71) is a cylindrical structure and can correspond to the locking hole (411) and the through hole (213). One end of the third spring (72) is placed inside the ejector (71), and the other end of the third spring (72) abuts against the inner wall of the second placement groove (212). The pressing block (44) can abut against the outer wall of the second placement groove (212).

10. A combination lock that is easy to assemble according to claim 9, characterized in that: The lock housing (2) has a number of openings (215) that are the same as the number of password wheels (64). When the mounting base (5) is placed in the receiving cavity (21), a part of the password wheel (64) passes through the openings (215) and protrudes outside the lock housing (2).

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