Key copying clamp

Abstract

The utility model belongs to the technical field of key copying, and provides a key copying clamp which comprises two bases, clamping mechanisms and a clamping plate, each base corresponds to one set of clamping mechanism, a supporting rib is arranged on one side of each base in a protruding mode in the longitudinal direction, each set of clamping mechanism comprises a pressing strip arranged at one end of the corresponding base, and the clamping plate is arranged on the pressing strip. The pressing strip and the supporting rib are located on the same side, the pressing strip is connected with the base through a fastener, the clamping plate is connected with the base in a clamped mode, a plurality of positioning grooves matched with the clamping plate are formed in the base in the longitudinal direction at intervals, the key fixing device further comprises a longitudinal and transverse positioning mechanism detachably connected with the base, and the longitudinal and transverse positioning mechanism, the clamping plate and the positioning grooves are matched to position keys. According to the clamp, the two pressing strips are matched with the fasteners for clamping, the contact area of the key and the pressing strips is increased, the clamping stability is improved, the key body can be effectively prevented from deforming in the machining process, it can be ensured that the positions, clamped on the base, of an original key and a duplicated key are kept consistent, and the key duplicating precision is further improved.

Description

Technical Field

[0001] This utility model relates to the field of key duplication technology, and in particular to a key duplication fixture. Background Technology

[0002] A vertical key duplication machine is essentially a copying machining device. Facing the machine, the left fixture holds drilling and milling cutters, while the right fixture holds the original key's guide pin. Current key duplication machine fixtures have a relatively simple structure, similar to a bench vise. The fixture has trapezoidal jaws on both sides, clamping the key body onto opposite sides of the key body via the side walls of the jaws. This often results in only two points on each side of the jaws contacting the key. Consequently, when the machine cutter cuts the key, the key may slip off due to insufficient clamping, causing the cutting teeth to chip and break. Excessive contact between the jaws and the key's sides accelerates wear and deforms the jaws, reducing the dimensional accuracy of the copied key and rendering the jaws unusable for key duplication. Furthermore, multiple clamping operations are required when machining the texture on the key's side; otherwise, the jaws may interfere with the cutting tool, damaging the fixture. This cumbersome operation also carries a high risk of key deformation due to over-clamping. These key duplication clamps are mainly designed for Class A and Class B keys on the market. These clamps cannot accurately hold and process the ever-changing and complex Class C keys.

[0003] Furthermore, many key duplication processes require drilling or milling the two sides of the key body. Older clamps, however, can only hold the key body by gripping the two sides, causing the cutting tool to frequently collide with the clamp. Damaged clamps are often irreparable, and even when damaged, they are difficult to reliably hold the key for processing. This makes the clamp a consumable part, requiring locksmiths to replace it periodically. All these problems necessitate a new key duplication clamp to solve.

[0004] The technical problem to be solved by this application is: how to solve the problem that existing key duplication jigs are inconvenient to hold and clamp keys, which affects the accuracy and efficiency of key duplication. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a practical key duplication fixture that can be added to an existing fixture. This key duplication fixture solves the aforementioned problems, particularly the problem of duplicating novel Class C keys. The key duplication fixture of this application has the following characteristics:

[0006] (1) The clamping position of this fixture is a non-processing part, that is, it only clamps the key handle or the key body to fix the key on the fixture.

[0007] (2) By setting a support rib with a width only half the width of a regular key body, the key to be copied is lifted by the support rib, so that the tool for milling the outer edge or drilling the edge will not touch the fixture, thus avoiding damage to the tool and fixture.

[0008] (3) A set of fixtures includes two bases, a card plate and a set of longitudinal and transverse positioning mechanisms, which unifies the dimensional accuracy and positioning benchmark, so the copied keys are also consistent and accurate, and can be successfully processed on one side at a time, which greatly improves the efficiency and accuracy of key copying.

[0009] The technical solution adopted by this utility model is as follows: a key duplication fixture, including a base, a clamping mechanism and a card plate. There are two bases, and each base corresponds to a set of clamping mechanisms. A support rib is provided on one side of the base along the longitudinal direction. Each set of clamping mechanisms includes a pressure strip set at one end of the base. The pressure strip and the support rib are located on the same side. The pressure strip is connected to the base by fasteners. The card plate is engaged with the base. Several positioning grooves that cooperate with the card plate are provided on the base along the longitudinal direction. It also includes a longitudinal and transverse positioning mechanism that is detachably connected to the base. The longitudinal and transverse positioning mechanism, the card plate and the positioning grooves are used to position the key.

[0010] The key duplication fixture of this application features two bases, one for the original key and the other for the duplicate key. Each base has a pressure strip at one end, which, in conjunction with fasteners, clamps the handle or the front and bottom surfaces of the key body. This increases the contact area between the key and the pressure strip, improving clamping stability. It eliminates the need to clamp areas requiring drilling or milling, preventing interference between the tool and the fixture. Processing on the same side can be completed in a single clamping operation, avoiding tedious key disassembly and reassembly. Furthermore, the inclusion of support ribs ensures that the bottom of the key body contacts the top of the support ribs after clamping, effectively preventing key deformation during processing and improving duplication accuracy. The longitudinal and transverse positioning mechanisms, clamping plates, and positioning slots ensure that the original and duplicate keys are positioned consistently on the bases, further enhancing duplication accuracy. Moreover, the bases can be directly mounted on vertical key duplication machines without damaging the original equipment structure, demonstrating good applicability.

[0011] In some embodiments, the longitudinal and transverse positioning mechanism includes a first guide ruler, which includes a first slider slidably connected to the base and a first positioning block disposed on the top of the first slider. The base has a groove along the longitudinal direction on the side of the support rib that slides with the first slider, and the first positioning block has an clearance groove on the side near the support rib.

[0012] Using the above technical solution, the first guide ruler is placed in the slide groove, and then the clamping plate is inserted into one of the positioning grooves, with the end of the first guide ruler abutting against the side of the clamping plate to define the position of the first guide ruler. Then, the side of the original key abuts against the side wall of the clearance groove, and the end corner of the first positioning block abuts against the positioning notch of the original key, realizing the horizontal and vertical positioning of the original key. Next, the locking strip locks the original key. Then, the clamping plate and the first guide ruler are removed and placed on another base, so that the clamping plate is inserted into the positioning groove at the same position. The above actions are repeated to position the key blank. Finally, the two bases are installed on the key duplicating machine to duplicate the key. By setting the clearance groove, it can be ensured that the key body is located in the middle of the support rib, avoiding collision between the tool and the support rib during milling.

[0013] In some embodiments, the longitudinal and transverse positioning mechanism further includes a second guide ruler, which includes a second slider slidably connected to the base and a second positioning block disposed on the top of the second slider. The base has a groove along the longitudinal direction on the side of the support rib that slides with the second slider. The second positioning block has the second slider protruding on the side near the support rib.

[0014] Using the above technical solution, the second guide ruler is placed in the slide groove, and then the clamping plate is inserted into one of the positioning slots, with the end of the second guide ruler abutting against the side of the clamping plate to define the position of the second guide ruler. Then, the side of the original key abuts against the side wall of the second positioning block, and the end corner of the second positioning block abuts against the positioning notch of the original key, thereby achieving the horizontal and vertical positioning of the original key. Next, the locking strip locks the original key, and then the clamping plate and the second guide ruler are removed and placed on another base, so that the clamping plate is inserted into the positioning slot at the same position. The above actions are repeated to position the key blank. Finally, the two bases are installed on the key duplicating machine to duplicate the key. By making the second slider protrude from the side of the second positioning block near the support rib, it can be ensured that the side wall of the key body to be processed extends out of the support rib, avoiding collision between the tool and the support rib during milling.

[0015] In some embodiments, the longitudinal and transverse positioning mechanism further includes a sliding positioning component. The sliding positioning component includes a slide block that slides with the base and a transverse positioning ruler mounted on the slide block. The slide block is provided with a guide groove for sliding with the base. A first locking component is threaded to one side of the slide block. The first locking component passes through the guide groove from one side of the slide block. One end of the transverse positioning ruler is connected to the slide block, and the other end extends into the guide groove. A positioning hook is provided at the end of the transverse positioning ruler that extends into the guide groove.

[0016] By adopting the above technical solution, a horizontal positioning ruler is set on the slide, and a positioning hook is set at the end of the horizontal positioning ruler to interlock with the positioning pit of the key body. The positioning hook and the card plate can limit the position of the original key on the base. Then, the card plate is inserted into the same positioning groove on another base to ensure that the key blank and the original key base are in the same position, thus ensuring the accuracy of key duplication.

[0017] In some embodiments, the transverse positioning ruler and the slide are connected by a second locking member. The slide is provided with a limiting groove for sliding engagement of the transverse positioning ruler. The transverse positioning ruler is provided with an elongated hole that extends in a direction perpendicular to the longitudinal direction of the base. The second locking member passes through the elongated hole and is threadedly connected to the slide.

[0018] By adopting the above technical solution, the length of the horizontal positioning ruler extending into the guide groove can be adjusted through the cooperation of the elongated hole and the second locking component, so that the positioning hook can be used with different types of keys, thus broadening the applicability of the clamp.

[0019] In some embodiments, the sliding positioning member also includes a height adjusting member that is threadedly connected to the slide block, a limiting groove is provided on the top of the slide block, the height adjusting member extends from the bottom of the slide block into the bottom of the limiting groove, and a second locking member passes through an elongated hole and is threadedly connected to the height adjusting member.

[0020] By adopting the above technical solution, the height of the horizontal positioning ruler can be adjusted by adjusting the depth of the height adjustment component screwed into the slide, so that the positioning hook matches the key, thereby improving the versatility of the clamp.

[0021] In some embodiments, the sliding positioning component further includes a longitudinal positioning ruler that slides with the slide block. The side of the slide block is provided with a slot that mates with the longitudinal positioning ruler. The slot is opened perpendicular to the support rib, and the longitudinal positioning ruler slides along the slot and extends from the side of the base into the guide groove.

[0022] By adopting the above technical solution, by setting a longitudinal positioning ruler, using the cooperation of the card plate and the positioning groove to determine the position of the slide on the base, and then using the cooperation of the transverse positioning ruler and the longitudinal positioning ruler to limit the position of the original key on the base, and then fixing the key blank on the same position on another base, it can be ensured that the key blank and the original key are in the same position on the base, thus ensuring the accuracy of key duplication.

[0023] In some embodiments, the pressure strip includes a first pressure strip and a second pressure strip arranged sequentially along the longitudinal direction of the base. The first pressure strip is connected to the base by a first fastener, and the second pressure strip is connected to the base by a second fastener.

[0024] By adopting the above technical solution, the key can be pressed more evenly by setting the first pressure bar and the second pressure bar to press the key together, which can prevent the key from warping due to uneven force. It can also hold keys whose handle and key body are not at the same height, thus improving its versatility.

[0025] In some embodiments, the clamping mechanism further includes a balance adjustment member threadedly connected to the base, the balance adjustment member extending from the bottom of the base toward the first pressure bar.

[0026] By adopting the above technical solution and setting a balance adjustment component, the depth of screwing into the base can be adjusted to ensure that the bottom of the key body fits snugly with the support rib, thus ensuring the accuracy of key duplication.

[0027] In some embodiments, the end of the support rib near the pressure strip is provided with an avoidance groove, and a pad block that fills the avoidance groove is movably disposed on the base.

[0028] By adopting the above technical solution and setting the clearance groove, a key with a height difference between the key body and the handle can be clamped, ensuring that the bottom of the key body fits snugly against the support rib. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a key duplication fixture according to a preferred embodiment of the present invention;

[0030] Figure 2 for Figure 1 The diagram shows the structure of the base and clamping mechanism in the key duplication fixture.

[0031] Figure 3 for Figure 1 An exploded view of the base and clamping mechanism in the key duplication fixture shown;

[0032] Figure 4 for Figure 1 The diagram shows the structure of the sliding positioning component in the key duplication fixture.

[0033] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the sliding positioning component shown;

[0034] Figure 6 Here are structural diagrams of three common types of keys;

[0035] Figure 7 For holding the key duplication fixture of this application Figure 6 A schematic diagram of the state structure of key type (a);

[0036] Figure 8 For holding the key duplication fixture of this application Figure 6 Schematic diagram of the state structure of type (b) key;

[0037] Figure 9 For holding the key duplication fixture of this application Figure 6 A schematic diagram of the state structure of key type (c).

[0038] In the diagram: 100, Key duplication clamp; 10, Base; 11, Support rib; 12, Positioning groove; 13, Slide groove; 14, Clearance groove; 15, Pad block; 16, Forward stop positioning surface; 17, Positioning rib; 20, Clamping mechanism; 21, First pressure bar; 22, Second pressure bar; 23, First fastener; 24, Second fastener; 25, Spring; 26, Balance adjustment component; 27, Balance pad; 30, Clamping plate; 40, Longitudinal and transverse positioning mechanism; 41, First guide ruler; 411, First slider; 412, First positioning block; 413, Clearance groove; 42, Second guide ruler; 421, Second slider; 422, Second positioning block; 43, Sliding positioning component; 431, Slide seat; 432, First locking component; 433, Transverse positioning ruler; 434, Positioning hook; 435, Second locking component; 436, Height adjustment component; 437, Longitudinal positioning ruler. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Please see Figures 1 to 5A key duplication fixture 100, a preferred embodiment of the present invention, includes a base 10, a clamping mechanism 20, and a clamping plate 30. There are two bases 10, and each base 10 corresponds to a set of clamping mechanisms 20. A support rib 11 is provided longitudinally on one side of the base 10. Each set of clamping mechanisms 20 includes a pressure strip disposed at one end of the base 10. The pressure strip and the support rib 11 are located on the same side. The pressure strip is connected to the base 10 by fasteners. The clamping plate 30 is engaged with the base 10. A plurality of positioning grooves 12 that cooperate with the clamping plate 30 are provided longitudinally on the base 10. The fixture also includes a longitudinal and transverse positioning mechanism 40 that is detachably connected to the base 10. The longitudinal and transverse positioning mechanism 40, the clamping plate 30, and the positioning grooves 12 cooperate to position the key. The key duplication fixture 100 of this application features two bases 10, one for the original key and the other for the duplicate key. Each base 10 has a pressure strip at one end, which, in conjunction with fasteners, clamps the handle or the front and bottom surfaces of the key body. This increases the contact area between the key and the pressure strip, improving clamping stability. It eliminates the need to clamp areas requiring drilling or milling, preventing interference between the tool and the fixture. The same side of the machining surface can be processed in a single clamping operation, avoiding tedious key disassembly and reassembly. Furthermore, the inclusion of support ribs 11 ensures that the bottom of the key body contacts the top of the support ribs after clamping, effectively preventing deformation of the key body during processing and improving key duplication accuracy. The longitudinal and transverse positioning mechanism 40, the clamping plate 30, and the positioning groove 12 ensure that the original key and the duplicate key are positioned consistently on the base 10, further enhancing key duplication accuracy.

[0043] Optionally, the number of each positioning groove 12 and the spacing between two adjacent positioning grooves 12 can be adjusted according to actual needs. Preferably, in order to facilitate the cooperation between the clamping plate 30 and the positioning groove 12, the positioning groove 12 passes through the edge of the support rib 11 and the base 10.

[0044] Preferably, in order to ensure consistency of reference, the two bases 10 share a single card plate 30 and a set of longitudinal and transverse positioning mechanisms 40.

[0045] like Figure 1As shown, the longitudinal and transverse positioning mechanism 40 includes a first guide ruler 41, which includes a first slider 411 slidably connected to the base 10 and a first positioning block 412 disposed on the top of the first slider 411. The base 10 has a groove 13 along the longitudinal direction on the side of the support rib 11 that slides and engages with the first slider 411. The first positioning block 412 has a clearance groove 413 on one side near the support rib 11, and the other side is flush with the first slider 411. The clamping plate 30 cooperates with the positioning groove 12 to position the first guide ruler 41 in the groove 13. When copying a key, it can be ensured that the first guide ruler 41 is set in the same position on both bases 10. The transverse position of the key is positioned by one of the two sides of the first positioning block 412 abutting against the side of the key body. The longitudinal position of the key is positioned by the end of the first positioning block 412 away from the clamping plate 30 abutting against the positioning notch on the key body. The positioning is convenient and quick, and the error of repeated positioning is small. An anti-air groove 413 is provided on one side of the first positioning block 412 to ensure that the key body is located in the middle of the support rib 11 and to avoid collision between the tool and the support rib 11 during milling.

[0046] Furthermore, in order to prevent the end of the first slider 411 from interfering with the positioning accuracy of the first positioning block 412, the two ends of the first positioning block 412 should be shorter than the two ends of the first slider 411.

[0047] Preferably, since the key is divided into left and right sides, in order to facilitate the placement of the first ruler 41, two sliding grooves 13 are provided on the base 10, and the two sliding grooves 13 are respectively located on both sides of the support rib 11.

[0048] like Figure 1 As shown, the longitudinal and transverse positioning mechanism 40 also includes a second guide ruler 42. The second guide ruler 42 includes a second slider 421 slidably connected to the base 10 and a second positioning block 422 disposed on the top of the second slider 421. The base 10 has a groove 13 along the longitudinal direction on the side of the support rib 11 that slides with the second slider 421. The second positioning block 422 has the second slider 421 protruding on the side near the support rib 11. The structure of the second guide ruler 42 is similar to that of the first guide ruler 41, except that the second positioning block 422 of the second guide ruler 42 has the second slider 421 protruding on both sides. Its function is also similar to that of the first guide ruler 41. By making the second positioning block 422 have the second slider 421 protruding on the side near the support rib 11, it can be ensured that the side wall of the key body to be processed extends out of the support rib 11, avoiding collision between the tool and the support rib 11 during milling.

[0049] Preferably, the lengths of the protrusions of the second slider 421 on both sides of the second positioning block 422 can be set to be different, and different sides can be selected as positioning references according to the key size to be processed.

[0050] like Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, the longitudinal and transverse positioning mechanism 40 further includes a sliding positioning component 43. The sliding positioning component 43 includes a slide block 431 that slides with the base 10 and a transverse positioning ruler 433 installed on the slide block 431. The slide block 431 is provided with a sliding guide groove for the base 10. A first locking component 432 is threadedly connected to one side of the slide block 431. The first locking component 432 passes through the guide groove from one side of the slide block 431. One end of the transverse positioning ruler 433 is connected to the slide block 431, and the other end extends into the guide groove. A positioning hook 434 is provided at the end of the transverse positioning ruler 433 that extends into the guide groove. The shape of the guide groove matches the outer contour of the base 10. A horizontal positioning ruler 433 is provided on the slide 431, and a positioning hook 434 is provided at the end of the horizontal positioning ruler 433. The positioning hook 434 cooperates with the card plate 30 to limit the position of the original key on the base 10. Then, the card plate 30 is inserted into the same positioning groove 12 on another base 10 to ensure that the key blank is in the same position on the original key base 10, thus ensuring the accuracy of key duplication.

[0051] Preferably, in order to facilitate the rotation of the first locking member 432, a knob is also provided at one end of the first locking member 432 where the slide block 431 protrudes, and the surface of the knob is provided with anti-slip texture.

[0052] Furthermore, the transverse positioning ruler 433 is connected to the slide block 431 via a second locking member 435. The slide block 431 has a limiting groove (not shown in the figure) for sliding engagement with the transverse positioning ruler 433. The transverse positioning ruler 433 has an elongated hole (not shown in the figure) extending in a direction perpendicular to the longitudinal direction of the base 10. The second locking member 435 passes through the elongated hole and is threadedly connected to the slide block 431. By engaging with the second locking member 435 through the elongated hole, the length of the transverse positioning ruler 433 extending into the guide groove can be adjusted, allowing the positioning hook 434 to engage with different types of keys, thus broadening the versatility of this fixture.

[0053] Preferably, positioning hooks 434 of different sizes and shapes can be set at both ends of the horizontal positioning ruler 433. When using it, the corresponding positioning hook 434 can be selected according to the key model for positioning, which makes it more versatile.

[0054] Furthermore, the sliding positioning component 43 also includes a height adjusting component 436 threadedly connected to the slide block 431. A limiting groove is provided on the top of the slide block 431, and the height adjusting component 436 extends from the bottom of the slide block 431 into the bottom of the limiting groove. The second locking component 435 passes through an elongated hole and is threadedly connected to the height adjusting component 436. By adjusting the depth to which the height adjusting component 436 is screwed into the slide block 431, the height of the transverse positioning ruler 433 can be adjusted, so that the positioning hook 434 matches the key, improving the versatility of the clamp.

[0055] Furthermore, the sliding positioning component 43 also includes a longitudinal positioning ruler 437 that slides and engages with the slide block 431. The side of the slide block 431 has a slot (not shown) that engages with the longitudinal positioning ruler 437. The slot is perpendicular to the support rib 11. The longitudinal positioning ruler 437 slides along the slot and extends from the side of the base 10 into the guide groove. By setting the longitudinal positioning ruler 437, the position of the slide block 431 on the base 10 is determined by the cooperation of the locking plate 30 and the positioning groove 12. Then, the position of the original key on the base 10 is limited by the cooperation of the transverse positioning ruler 433 and the longitudinal positioning ruler 437. Then, the key blank is fixed in the same position on another base 10, which ensures that the key blank and the original key are in the same position on the base 10, thus ensuring the accuracy of key duplication.

[0056] Preferably, for ease of use, there are two longitudinal positioning rulers 437, which are respectively set on opposite sides of the slide block 431.

[0057] Optionally, to prevent the longitudinal positioning ruler 437 from easily separating from the slot, the cross-sectional shape of the slot is trapezoidal.

[0058] like Figure 2 and Figure 3 As shown, the pressure strip includes a first pressure strip 21 and a second pressure strip 22 arranged longitudinally along the base 10. The first pressure strip 21 is connected to the base 10 via a first fastener 23, and the second pressure strip 22 is connected to the base 10 via a second fastener 24. By setting the first pressure strip 21 and the second pressure strip 22 to work together to press the key, the key can be subjected to more even force, avoiding the key warping caused by uneven force, and can also hold keys whose handle and key body are not at the same height, thus improving versatility.

[0059] Preferably, in order to facilitate the key passing between the pressure strip and the base 10, a spring 25 is fitted on the first fastener 23 and the second fastener, one end of the spring 25 abutting against the first pressure strip 21 or the second pressure strip 22, and the other end abutting against the base 10.

[0060] Furthermore, the clamping mechanism 20 also includes a balance adjustment member 26 threadedly connected to the base 10, which extends from the bottom of the base 10 toward the first pressure bar 21. By providing the balance adjustment member 26, the depth of screwing into the base 10 can be adjusted to ensure that the bottom of the key body fits snugly against the support rib 11, thus ensuring the accuracy of key duplication.

[0061] Preferably, in order to prevent the balance adjustment member 26 from damaging the key, the clamping mechanism 20 also includes a balance pad 27. The balance pad 27 is provided with a through hole for the first fastener 23 to pass through. The balance pad 27 is set on the top of the base 10, and the two ends of the spring 25 abut against the balance pad 27 and the first pressure bar 21 respectively. When clamping the key, the key passes through the balance pad 27 and the first pressure bar 21.

[0062] Preferably, the support rib 11 has a relief groove 14 at one end near the pressure strip, and a pad 15 for filling the relief groove 14 is movably disposed on the base 10. By providing the relief groove 14, keys with a height difference between the key body and the handle can be clamped, ensuring that the bottom of the key body is in contact with the support rib 11. The pad 15 can fill the relief groove 14 when clamping a flat key, preventing the key body from tilting up and failing to fit against the support rib 11 when clamping the key.

[0063] Furthermore, in order to facilitate the positioning of the pad 15, a through hole is provided on the pad 15 for the second fastener 24 to pass through, and the two ends of the spring 25 sleeved on the surface of the second fastener 24 respectively abut against the pad 15 and the second pressure strip 22.

[0064] like Figure 6 As shown, these are three common types of Class C keys on the market. The first type of key (corresponding to a in the figure) has a positioning notch on one or both sides of the key body. When making the key, the positioning notch and the side of the key body are used as positioning references. The second type of key (corresponding to b in the figure) has a positioning pit on the key body that is set along the length direction. When making the key, the positioning pit and the tail of the key body are used as positioning references. The third type of key (corresponding to c in the figure) has a positioning pit and a positioning notch on the key body. When making the key, the positioning hole and the positioning notch are used as positioning references.

[0065] In one embodiment, such as Figure 2 As shown, the base 10 is also provided with a forward stop positioning surface 16 and a positioning rib 17. The forward stop positioning surface 10 is located at one end of the base 10 near the pressure strip, and the positioning rib 17 is located at the bottom of the base 10. The positioning rib 17 is arranged parallel to the support rib 11. The forward stop positioning surface 16 and the positioning rib 17 are used to position the base 10 on the key duplicator to improve the positioning accuracy of the base 10 on the key duplicator.

[0066] The following examples of three common types of Class C keys on the market illustrate the working principle of the key duplication fixture 100 in this application:

[0067] like Figure 7As shown, when the key to be copied is the first type of key mentioned above, and the milled parts are the front and back sides of the key body, firstly, the locking plate 30 is engaged with one of the positioning slots 12, then the first guide ruler 41 is placed in the sliding groove 13, so that one end of the first slider 411 abuts against the side of the locking plate 30, and then the original key is inserted between the first pressure strip 21 and the base 10, so that the end corner of the first positioning block 412 abuts against the positioning notch of the key body, and the side of the key body abuts against the side of the first positioning block 412 near the support rib 11, and then fastened. After the original key is locked onto the base 10 with the fitting and pressure strip, observe whether the bottom of the key is tightly attached to the support rib 11. If it is not tightly attached, adjust the balance adjustment component 26 to make the bottom of the key tightly attached to the support rib 11 to complete the accurate positioning. Remove the first guide ruler 41 and the clamping plate 30, and then insert the clamping plate 30 into the same positioning groove 12 on the other base 10. Repeat the above actions to lock the key blank to be copied onto the other base 10. Then remove the clamping plate 30 and the first guide ruler 41, and install the two bases 10 on the key copying machine to copy the key.

[0068] When the key to be copied is the first type of key mentioned above, and the milled parts are the front, back, and edges of the key body, first engage the locking plate 30 with one of the positioning slots 12, then place the second guide ruler 42 into the slide groove 13, so that one end of the second slider 421 abuts against the side of the locking plate 30. Then insert the original key between the first pressure strip 21 and the base 10, so that the end corner of the second positioning block 422 abuts against the positioning notch of the key body, and the side of the key body abuts against the side of the second positioning block 422 near the support rib 11. Then use a fastener. After the original key is locked onto the base 10 with the fitting and pressure strip, observe whether the bottom of the key is tightly attached to the support rib 11. If it is not tightly attached, adjust the balance adjustment component 26 to make the bottom of the key tightly attached to the support rib 11 to complete the accurate positioning. Remove the second guide ruler 42 and the clamping plate 30, and then insert the clamping plate 30 into the same positioning groove 12 on another base 10. Repeat the above actions to lock the key blank to be copied onto another base 10. Then remove the clamping plate 30 and the second guide ruler 42, and install the two bases 10 on the key copying machine to copy the key.

[0069] like Figure 8As shown, when it is necessary to copy the second type of key, slide the slide 431 onto the surface of the base 10 and slide it to a suitable position. Then insert the locking plate 30 into one of the positioning slots 12, so that the side of the slide 431 abuts against the side of the locking plate 30. Then lock the first locking member 432. Next, adjust the length and height of the horizontal positioning ruler 433 extending into the guide groove and lock the second locking member 435. Then insert the original key into the base 10 between the first pressure strip 21 and the balance pad 27, so that the tail of the key body abuts against the locking plate 30 and the positioning pit on the key body engages with the positioning hook 434 on the horizontal positioning ruler 433. Then screw... Tighten the first fastener 23 and the second fastener 24 to lock the original key. Observe whether the bottom of the key is in close contact with the support rib 11. If it is not in close contact, adjust the balance adjustment piece 26 to make the bottom of the key in close contact with the support rib 11 to complete the accurate positioning. Then remove the card plate 30 and the sliding positioning piece 43, install the card plate 30 and the sliding positioning piece 43 on another base 10, and then insert the card plate 30 into the same positioning groove 12 on the other base 10. Repeat the above actions to lock the key blank to be copied on the other base 10. After that, remove the card plate 30 and the sliding positioning piece 43, and install the two bases 10 on the key copying machine to copy the key.

[0070] like Figure 9 As shown, when it is necessary to copy the second type of key, first, slide 431 is placed on base 10, then the locking plate 30 is inserted into one of the positioning slots 12. The side of slide 431 closest to the locking plate 30 is brought into contact with the locking plate 30 and the first locking member 432 is locked. Then, the locking plate 30 is removed, and the original key is inserted into base 10. After adjusting the length and height of the horizontal positioning ruler 433 extending into the guide groove, the second locking member 435 is locked, so that the positioning hook 434 is inserted into the positioning pit on the key body. Then, the vertical positioning ruler 433 is inserted into the positioning pit on the key body. 37 is pushed into the guide groove so that the end of the longitudinal positioning ruler 437 abuts against the positioning notch of the key body. Tighten the first fastener 23 and the second fastener to lock the original key. Observe whether the bottom of the key is close to the support rib 11. If it is not close, adjust the balance adjustment piece 26 to make the bottom of the key close to the support rib 11 to complete the accurate positioning. Then remove the sliding positioning piece 43 and repeat the above actions to lock the key blank to be copied onto another base 10. Then install the two bases 10 on the key copying machine to copy the key.

[0071] The key duplication fixture 100 of this application, after years of trial and improvement, can now hold most complex Class C keys available on the market, offering multi-functionality and wide adaptability. Furthermore, it requires no modification or alteration to existing vertical key duplication machines; simply place the key duplication fixture 100 onto the original machine's fixture and tighten it for use. It is easy to install and remove, highly adaptable, and equipment-friendly. Adding the key duplication fixture 100 is equivalent to upgrading the original vertical key duplication machine, expanding the scope of key duplication services, and is relatively simple. With the key duplication fixture 100 installed, a vertical key duplication machine, after clamping the original key and the key blank to be copied, can achieve single-sided key processing with perfect accuracy in one pass. The key duplication fixture 100 of this application encapsulates the essentials of key duplication and is precisely machined according to mechanical principles, resolving users' concerns about various precision requirements and eliminating the cumbersome insertion of various shims. It is easy to operate and user-friendly.

[0072] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A key-duplicating jig comprising a base (10), a clamping mechanism (20) and a card (30), characterised in that, The base (10) is two in number, and each of the base (10) corresponds to a set of clamping mechanisms (20) respectively, one side of the base (10) is longitudinally provided with a support rib (11), each set of the clamping mechanisms (20) includes a pressing strip arranged at one end of the base (10), the pressing strip is located at the same side as the support rib (11), the pressing strip is connected with the base (10) through a fastener, the clamping plate (30) is clamped with the base (10), a plurality of positioning grooves (12) matched with the clamping plate (30) are longitudinally and spaced apart on the base (10), and the longitudinal and transverse positioning mechanisms (40) detachably connected with the base (10) are further arranged, the longitudinal and transverse positioning mechanisms (40), the clamping plate (30) and the positioning grooves (12) are matched to position the key.

2. The key-duplicating jig according to claim 1, characterized by The longitudinal and transverse positioning mechanisms (40) include a first ruler (41), the first ruler (41) includes a first sliding block (411) slidably connected with the base (10) and a first positioning block (412) arranged at the top of the first sliding block (411), the base (10) is provided with a sliding groove (13) slidably matched with the first sliding block (411) on the side of the support rib (11) in the longitudinal direction, and the side of the first positioning block (412) close to the support rib (11) is provided with a clearance groove (413).

3. The key-duplicating jig according to claim 1, wherein The longitudinal and transverse positioning mechanisms (40) further include a second ruler (42), the second ruler (42) includes a second sliding block (421) slidably connected with the base (10) and a second positioning block (422) arranged at the top of the second sliding block (421), the base (10) is provided with a sliding groove (13) slidably matched with the second sliding block (421) on the side of the support rib (11) in the longitudinal direction, and the side of the second positioning block (422) close to the support rib (11) is provided with the second sliding block (421).

4. The key-duplicating jig according to claim 1, wherein The longitudinal and transverse positioning mechanisms (40) further include a sliding positioning piece (43), the sliding positioning piece (43) includes a sliding seat (431) slidably matched with the base (10) and a transverse positioning ruler (433) mounted on the sliding seat (431), the sliding seat (431) is provided with a guide groove slidably matched with the base (10), one side of the sliding seat (431) is threadedly connected with a first locking piece (432), the first locking piece (432) penetrates into the guide groove from one side of the sliding seat (431), one end of the transverse positioning ruler (433) is connected with the sliding seat (431), and the other end extends into the guide groove, and the end of the transverse positioning ruler (433) extending into the guide groove is provided with a positioning hook (434).

5. The key-duplicating jig according to claim 4, wherein The transverse positioning ruler (433) and the sliding seat (431) are connected through a second locking piece (435), the sliding seat (431) is provided with a limiting groove slidably matched with the transverse positioning ruler (433), the transverse positioning ruler (433) is provided with a long slot, the long slot extends in a direction perpendicular to the longitudinal direction of the base (10), and the second locking piece (435) threadedly connects with the sliding seat (431) through the long slot.

6. The key-duplicating jig according to claim 5, wherein The sliding positioning piece (43) further comprises a height adjusting piece (436) threadedly connected with the sliding base (431), the limiting groove is arranged on the top of the sliding base (431), the height adjusting piece (436) extends into the bottom of the limiting groove from the bottom of the sliding base (431), and the second locking piece (435) is threadedly connected with the height adjusting piece (436) through the long strip hole.

7. The key-duplicating jig according to claim 4, wherein The sliding positioning piece (43) further comprises a longitudinal positioning ruler (437) in sliding cooperation with the sliding base (431), the side surface of the sliding base (431) is provided with a clamping groove in cooperation with the longitudinal positioning ruler (437), the clamping groove is vertically arranged on the support rib (11), and the longitudinal positioning ruler (437) extends into the guide groove from the side surface of the base (10) in sliding along the clamping groove.

8. The key-duplicating jig according to claim 1, wherein The pressing strip comprises a first pressing strip (21) and a second pressing strip (22) arranged in sequence along the longitudinal direction of the base (10), the first pressing strip (21) is connected with the base (10) through a first fastener (23), and the second pressing strip (22) is connected with the base (10) through a second fastener (24).

9. The key-duplicating jig according to claim 8, wherein The clamping mechanism (20) further comprises a balance adjusting piece (26) threadedly connected with the base (10), and the balance adjusting piece (26) extends from the bottom of the base (10) to the first pressing strip (21).

10. The key-duplicating jig according to claim 1, characterized by The support rib (11) is provided with an avoiding groove (14) at one end close to the pressing strip, and the base (10) is movably provided with a pad (15) for filling the avoiding groove (14).

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