Detection tool

Abstract

The utility model discloses a testing fixture, which is used for testing a torsion spring, in the testing fixture, a calibration piece comprises a base body and a limiting column, the base body is provided with a first marking part and a second marking part, the first marking part and the second marking part are arranged at an interval along the circumferential direction of the base body, and the limiting column is arranged on the base body in a protruding manner. The first torsion arm and the second torsion arm can be clamped on two opposite sides of the limiting column; the screwing piece comprises a body and a protruding block, the body and the base body are in limiting fit in the radial direction of the torsional spring, the body and the base body can relatively rotate in the circumferential direction of the base body, a third marking part is arranged on the body, the protruding block is fixedly connected to the body, and the protruding block and the limiting column cross the same angle in the circumferential direction. The protruding block is used for being clamped between the first torsion arm and the second torsion arm. The detection tool can detect whether the torsion spring meets the assembly requirement or not so as to ensure that the handle can be kept or basically kept in a horizontal state after the torsion spring is assembled into the door lock.

Description

Technical Field

[0001] The present application relates to the technical field of detection equipment, and in particular to a detection tool. Background Art

[0002] Springs are usually made of metal materials such as steel through stretching and torsion. Affected by the material's own characteristics and heat treatment process characteristics, the overall shape and size of springs produced in different batches or even the same batch are usually not completely consistent, which leads to large individual differences in spring performance. In addition, the workload of testing whether the springs are qualified by measuring parameters such as size and shape one by one is huge, and it is also impossible to truly reflect the actual assembly effect of the spring.

[0003] Take the torsion spring as an example. The torsion spring can produce torsional elasticity, and the two ends of the spring body are respectively provided with torsion arms. Generally, a torsion spring is provided in a door lock so that the handle can remain horizontal when not subject to external force, and when the handle is rotated, rotation damping is provided for the handle, so that after the handle is restored to a state where it is not subject to external force, it can be restored to its original position under the action of the torsion spring. However, if there is an error in the precision of the torsion spring, the assembled handle may slightly rise or droop when not subject to external force. If the angle of the handle rising or drooping is relatively large, the appearance of the handle may be poor, and in severe cases, it may even have an adverse effect on the normal opening and closing of the door lock by the handle, which may hinder the normal use of the product. Utility Model Content

[0004] The present application discloses a checking fixture, which can detect whether a torsion spring meets assembly requirements, so as to ensure that the torsion spring can keep a handle in a horizontal state or substantially in a horizontal state after being assembled into a door lock.

[0005] In order to solve the above problems, this application adopts the following technical solutions:

[0006] The present application embodiment discloses a test fixture for testing a torsion spring, wherein the torsion spring comprises a first torsion arm, a second torsion arm and a spring body, wherein the first torsion arm and the second torsion arm are respectively connected to opposite ends of the spring body, and the test fixture comprises:

[0007] The calibration piece comprises a base and a limiting column, the base is provided with a first marking portion and a second marking portion, the first marking portion and the second marking portion are arranged at intervals along the circumference of the base, the limiting column is protrudingly arranged on the base, and the first torsion arm and the second torsion arm can be clamped on opposite sides of the limiting column;

[0008] A screwing piece, the screwing piece includes a main body and a protrusion, the main body and the base cooperate with the radial upper limit of the torsion spring, and the main body and the base can rotate relative to each other in the circumferential direction of the base, the main body is provided with a third marking portion, the protrusion is fixedly connected to the main body, and the angle spanned by the protrusion and the limiting column in the circumferential direction is equal, and the protrusion is used to be clamped between the first torsion arm and the second torsion arm.

[0009] The technical solution adopted in this application can achieve the following beneficial effects:

[0010] The embodiment of the present application discloses a test fixture, which is used to detect whether the torsion spring can ensure that the handle has the required horizontality after being installed on the door lock and other products. Among them, the screwing piece and the calibration piece in the test fixture are assembled, and the two are mutually limited in the radial direction of the torsion spring, and can rotate relative to each other in the winding direction of the torsion spring. The first torsion arm and the second torsion arm of the torsion spring can be respectively clamped on the opposite sides of the limiting column of the calibration piece. Since the angles spanned by the protrusions on the limiting column and the screwing piece in the winding direction of the torsion spring, that is, the circumferential direction of the base body, are equal, and then after the protrusion is clamped between the first torsion arm and the second torsion arm, if the third marking part on the screwing piece can only be fixed or moved between the first marking part and the second marking part, it means that the torsion spring can make the horizontality of the handle meet the requirements. On the contrary, if the third marking part exceeds the range marked by the first marking part and the second marking part during the rotation of the protrusion relative to the limiting column, it means that the torsion spring cannot make the corresponding handle meet the requirements.

[0011] As described above, the present application provides a testing fixture, which can relatively easily test whether a torsion spring can ensure that the horizontality of the corresponding handle meets the requirements. The testing fixture has a simple structure and is easy to use. In addition, the detection accuracy and reliability are relatively high, and it can reflect the actual assembly status of the torsion spring, thereby ensuring that the torsion spring tested by the testing fixture can meet the corresponding requirements for the horizontality of the handle after being assembled on products such as door locks, and ensure that products such as door locks can be used normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 It is a schematic diagram of the structure of a torsion spring and a checking fixture disclosed in an embodiment of the present application;

[0014] Figure 2 It is an exploded schematic diagram of a torsion spring and a gauge disclosed in an embodiment of the present application;

[0015] Figure 3is a schematic cross-sectional view of the assembly of a torsion spring and a gauge disclosed in an embodiment of the present application;

[0016] Figure 4 It is a schematic diagram of the structure of the calibration part in the inspection fixture disclosed in the embodiment of the present application;

[0017] Figure 5 It is a schematic diagram of the structure of the screwing part in the inspection tool disclosed in the embodiment of the present application;

[0018] Figure 6 It is a schematic diagram of the structure of the screwing part in the inspection tool disclosed in the embodiment of the present application in another direction;

[0019] Figure 7 It is a structural schematic diagram of the virtual position angle detection component in the inspection fixture disclosed in the embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100-calibration part, 110-base, 111-blind hole, 120-limiting column, 131-first marking part, 132-second marking part, 140-first protruding part, 150-supporting flange, 160-plug sleeve,

[0022] 200-screw piece, 210-body, 220-bump, 230-third marking portion, 240-plug-in column, 250-grip portion,

[0023] 300-virtual position angle detection member, 301-fourth marking portion, 302-fifth marking portion, 310-cylinder, 320-second protruding portion,

[0024] 400-damping parts,

[0025] 900 - torsion spring, 910 - first torsion arm, 920 - second torsion arm, 930 - spring body. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0027] The technical solutions disclosed in various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-Figure 7As shown, the embodiment of the present application discloses a test fixture, which can detect the torsion spring 900. In detail, the torsion spring 900 may include a first torsion arm 910, a second torsion arm 920 and a spring body 930, and the spring body 930 is generally designed in a circular winding type, and can be specifically wound clockwise or counterclockwise. The first torsion arm 910 and the second torsion arm 920 are respectively connected to the opposite ends of the spring body 930, so that the spring body 930 can be deformed by making the first torsion arm 910 and the second torsion arm 920 approach each other or move away from each other, thereby causing the torsion spring 900 to generate an elastic force. The test fixture disclosed in the embodiment of the present application can detect the torsion spring 900 of the above structure to detect whether the torsion spring 900 can keep the handle horizontal without being affected by external forces after forming an assembly relationship with the handle of the door lock. It should be noted that the structure of the aforementioned handle is usually bent, that is, the handle is "L" shaped as a whole, or the handle includes a first rod segment and a second rod segment that are fixedly connected, the first rod segment is a free end, and is interconnected with other structures of the door lock through the second rod segment. During use, the user can drive the second rod segment to rotate by screwing the first rod segment to drive the lock core of the door lock to rotate, thereby achieving the purpose of opening and closing the door lock. Obviously, in the common use scenarios of door locks with the aforementioned structure, the first rod segment is usually parallel or substantially parallel to the ground. The inspection fixture disclosed in the embodiment of the present application is used to detect the torsion spring 900 that cooperates with the handle to ensure that the torsion spring 900 can ensure that the first rod segment of the handle is horizontal or substantially horizontal after being installed on the handle. Of course, when the structural form of the handle is generally the same or similar to the structural form of the above-mentioned handle, the torsion spring 900 of other handles can also be inspected using the inspection fixture disclosed in the embodiment of the present application. Figure 1 As shown, the gauge disclosed in the embodiment of the present application includes a calibration component 100 and a screw component 200 .

[0029] Among them, Figure 1 As shown, the calibration piece 100 includes a base 110 and a limiting column 120. The base 110 is the basic structure of the calibration piece 100. Other structures in the calibration piece 100, such as the limiting column 120, are connected or installed on the base 110. In addition, other devices in the gauge, such as the screw 200, can also be directly or indirectly installed on the base 110. The base 110 is generally a block-shaped structural member, and its shape and size can be flexibly selected according to actual conditions. In order to reduce its design difficulty and improve its scope of application, the base 110 is optionally a generally circular columnar structure. Of course, other structural features can also be provided on the base 110, which is not limited herein.

[0030] As described above, the torsion spring 900 can be inspected using the inspection fixture disclosed in the embodiment of the present application, so that after the torsion spring 900 is installed on the handle of a door lock, etc., the handle can be kept or basically kept in a horizontal state. Furthermore, in the inspection of the torsion spring 900, a standard range that meets the design and use requirements can be set for the torsion spring 900. If the torsion spring 900 can meet the range, it is considered that after the torsion spring 900 is assembled with the handle, the horizontal degree of the handle can meet the corresponding requirements. To this end, in the inspection fixture disclosed in the embodiment of the present application, a first marking portion 131 and a second marking portion 132 are provided on the base 110, and the first marking portion 131 and the second marking portion 132 are spaced apart along the axial direction of the base 110, or, in layman's terms, the first marking portion 131 and the second marking portion 132 are spaced apart along the torsion direction of the torsion spring 900, that is, the winding direction of the spring body 930 in the torsion spring 900. Alternatively, it can be considered that the first marking portion 131 and the second marking portion 132 are spaced apart by a preset angle in the corresponding circumferential direction. For example, the angle between the first marking portion 131 and the second marking portion 132 can be specifically 1.6°. Of course, the aforementioned preset angle can be flexibly determined according to parameters such as corresponding design standards in the application product of the torsion spring 900, and this document does not limit this. That is, the first marking portion 131 and the second marking portion 132 are used to calibrate the standard range of the torsion spring 900. If the torsion spring 900 meets the range, it is considered that the relevant parameters of the torsion spring 900 corresponding to the handle horizontality meet the requirements. Otherwise, it means that the relevant parameters of the torsion spring 900 corresponding to the handle horizontality do not meet the requirements.

[0031] Specifically, the first marking portion 131 and the second marking portion 132 can be convex ridges, or, for the sake of ease of processing, both can also be marking lines, that is, the first marking portion 131 and the second marking portion 132 can be formed on the substrate 110 by engraving or the like. Of course, the first marking portion 131 and the second marking portion 132 can also adopt other structural forms, which is not limited in this article.

[0032] As mentioned above, the calibration part 100 includes a limiting column 120, which is used as a substitute for the device used to install the torsion spring 900 in the door lock. In detail, when the torsion spring 900 is installed in a door lock or other product, its first torsion arm 910 and the second torsion arm 920 can be respectively arranged on opposite sides of a limiting structure, so that the torsion spring 900 forms an assembly relationship with other structures in the door lock. Correspondingly, in the inspection fixture disclosed in the embodiment of the present application, in order to simulate the actual assembly state of the torsion spring 900 in the corresponding door lock or other product, a limiting column 120 is correspondingly arranged. Accordingly, during the detection process, the first torsion arm 910 and the second torsion arm 920 of the torsion spring 900 can be respectively arranged on opposite sides of the limiting column 120, so that the first torsion arm 910 and the second torsion arm 920 clamp the limiting column 120, so that the torsion spring 900 is stretched to a certain extent.

[0033] Of course, in the process of processing the gauge disclosed in the embodiment of the present application, it is necessary to determine the size of at least the components including the limit column 120 according to the actual application product of the torsion spring 900. In detail, it is necessary to design the size of the limit column 120 in the gauge disclosed in the embodiment of the present application according to the size of the above-mentioned limit structure used to clamp the torsion spring 900 in the product to which the torsion spring 900 is actually applied. More specifically, it is necessary to make the distance between the opposite side surfaces of the limit column 120 used to clamp the first torsion arm 910 and the second torsion arm 920 equal to the distance between the opposite side surfaces of the above-mentioned limit structure used to clamp the first torsion arm 910 and the second torsion arm 920. More specifically, taking the example that the limiting column 120 and the above-mentioned limiting structure are both cubic structures with square bottom surfaces, it is necessary to make the bottom side length of the limiting column 120 equal to the bottom side length of the above-mentioned limiting structure, so as to ensure that the state of the torsion spring 900 being stuck on the limiting column 120 is the same or substantially the same as the state actually installed on the above-mentioned limiting structure, thereby ensuring the validity of the test results. In another embodiment of the present application, in order to reduce the difficulty of testing the torsion spring 900, the limiting column 120 can be made into a cylindrical structural member, which makes the assembly difficulty between the first torsion arm 910 and the second torsion arm 920 and the limiting column 120 relatively lower.

[0034] In addition, in order to make the assembly state between the torsion spring 900 and the calibration piece 100 more stable, one or more other clamping members may be provided on the base 110, and the positions of the aforementioned clamping members may be designed accordingly according to parameters such as the diameter of the torsion spring 900, so that the spring body 930 of the torsion spring 900 can be sleeved outside the clamping member, thereby improving the assembly stability between the torsion spring 900 and the calibration piece 100, which can further improve the accuracy and reliability of the test results of the torsion spring 900.

[0035] Accordingly, in the inspection fixture disclosed in the embodiment of the present application, there is also provided a replacement structure for the handle of a door lock or other product, namely, the above-mentioned screwing member 200. In the door lock or other product, a block is provided on the handle, and the block can be embedded between the first torsion arm 910 and the second torsion arm 920 of the torsion spring 900. When the parameters such as the shape and size of the torsion spring 900 meet the design requirements, after the first torsion arm 910 and the second torsion arm 920 of the torsion spring 900 are respectively clamped on the opposite sides of the above-mentioned limiting structure of the door lock, the block can just be clamped in the gap between the first torsion arm 910 and the second torsion arm 920 that are squeezed by the limiting structure and thus open at a certain angle, and the block cannot rotate relative to the first torsion arm 910 and the second torsion arm 920. Accordingly, the block cannot drive the first torsion arm 910 and the second torsion arm 920 to rotate relative to the limiting structure. In this case, after the torsion spring 900 is installed in the door lock or other product, the first rod section of the handle is theoretically in a completely horizontal state.

[0036] Of course, as mentioned above, in the actual processing, affected by various processing errors, the shape and size of the torsion spring 900 may have certain processing errors. When the processing errors meet the design requirements, the torsion spring 900 can also be considered a product that meets the requirements. Accordingly, when the torsion spring 900 whose processing error meets the design requirements is installed in products such as door locks, the first torsion arm 910 and the second torsion arm 920 of the torsion spring 900 can be respectively clamped on opposite sides of the limiting structure, and after the clamping block is clamped in the first torsion arm 910 and the second torsion arm 920, there may be a gap between the clamping block and at least one of the first torsion arm 910 and the second torsion arm 920. At this time, the clamping block can rotate relative to the torsion spring 900 and the first torsion arm 910 and the second torsion arm 920 of the limiting structure; or, after the clamping block is clamped in the first torsion arm 910 and the second torsion arm 920, it is possible that the clamping block further squeezes the first torsion arm 910 and the second torsion arm 920, so that the first torsion arm 910 and the second torsion arm 920 are further opened. At this time, at least one of the first torsion arm 910 and the second torsion arm 920 is no longer clamped with the limiting structure, that is, the clamping block can drive the first torsion arm 910 and the second torsion arm 920 to rotate relative to the limiting structure.

[0037] Based on the above situation, in order to test whether the torsion spring 900 can make the horizontality of the handle meet the requirements after actual assembly, the screw part 200 includes a main body 210 and a protrusion 220, wherein the main body 210 can be used as a replacement structure for the first rod segment and the second rod segment of the handle, and the protrusion 220 can be used as a replacement structure for the block of the handle. Accordingly, the specific size of the protrusion 220 also needs to correspond to the specific size of the block in the handle. In other words, the angle spanned by the protrusion 220 in the winding direction of the torsion spring 900 is equal to the angle spanned by the limit column 120 in the winding direction of the torsion spring 900. Correspondingly, the size of the protrusion 220 can be determined accordingly according to the positional relationship between the protrusion 220 and the limit column 120, and the size of the limit column 120. For example, in the diameter direction of the torsion spring 900, the protrusion 220 is farther away from the center of the torsion spring 900 than the limiting column 120, that is, the protrusion 220 is located on the outside of the limiting column 120. Then, in the protrusion 220 and the limiting column 120 that span the same angle, the maximum arc length of the protrusion 220 should be greater than the maximum arc length of the limiting column 120. If the protrusion 220 is located on the outside of the limiting column 120, the maximum arc length of the protrusion 220 is less than the maximum arc length of the limiting column 120.

[0038] During the assembly process, the body 210 of the screwing member 200 and the base 110 of the calibration member 100 are matched in the radial upper limit of the torsion spring 900, and the body 210 and the base 110 can rotate relative to each other in the circumferential direction of the base 110, that is, in the winding direction of the torsion spring 900, so as to ensure that the inspection tool can perform the inspection work normally. Specifically, the body 210 and the base 110 can form a plug-in matching relationship. In this case, it is relatively easy to make the body 210 and the base 110 mutually limit the radial direction of the torsion spring 900 and relatively rotate in the winding direction of the torsion spring 900. More specifically, the screwing member 200 can be provided with a through hole, and the base 110 can be provided with a plug-in column 240. By making the through hole and the plug-in column 240 both circular structures, the body 210 and the base 110 can form a plug-in matching relationship, and ensure that the two can limit each other in the above-mentioned radial direction and move relative to each other in the above-mentioned winding direction.

[0039] Meanwhile, the body 210 is provided with a third marking portion 230, which is used to determine the relative rotation range between the screwing member 200 and the calibration member 100 during the test of the torsion spring 900. Of course, the specific position of the third marking portion 230 needs to correspond to the specific positions of the stop column 120, the protrusion 220, the first marking portion 131 and the second marking portion 132, so that when the interval angles (including zero) between the protrusion 220 and the first torsion arm 910 and the second torsion arm 920, and the interval angles (including zero) between the stop column 120 and the first torsion arm 910 and the second torsion arm 920 are equal, the third marking portion 230 can be indicated at the angle bisector between the first marking portion 131 and the second marking portion 132, that is, the interval angles between the third marking portion 230 and the first marking portion 131 and the second marking portion 132 are also equal. Similarly, the third marking portion 230 may also be a convex ridge, or the third marking portion 230 may also be a marking line, or a marking arrow or other mark, which is not limited herein.

[0040] The protrusion 220 is fixedly connected to the body 210, and the protrusion 220 is located on the side of the body 210 facing the base 110, so as to ensure that the protrusion 220 can be clamped between the first torsion arm 910 and the second torsion arm 920 together with the limiting column 120. The shape of the protrusion 220 can be rectangular. In order to improve the detection accuracy, the protrusion 220 can be generally an arc-shaped structure, and the arc-shaped protrusion 220 extends along the winding direction of the torsion spring 900.

[0041] As described above, the angles spanned by the protrusion 220 and the limiting column 120 in the circumferential direction of the base 110, that is, in the winding direction of the torsion spring 900, are equal, and the protrusion 220 is used to be clamped between the first torsion arm 910 and the second torsion arm 920. When the first torsion arm 910 and the second torsion arm 920 are already clamped on opposite sides of the limiting column 120, when the protrusion 220 is also clamped between the first torsion arm 910 and the second torsion arm 920, if the shape and size of the torsion spring 900 are not the corresponding parameters under the ideal state, it is possible that the protrusion 220 and at least one of the first torsion arm 910 and the second torsion arm 920 are spaced apart from each other, or the protrusion 220 squeezes the first torsion arm 910 and the second torsion arm 920, resulting in a situation where the limiting column 120 and at least one of the first torsion arm 910 and the second torsion arm 920 are spaced apart from each other. At this time, by rotating the screw member 200 relative to the calibration member 100, the protrusion 220 may drive the torsion spring 900 to rotate relative to the limit column 120, or the protrusion 220 may rotate relative to the torsion spring 900 and the limit column 120. Accordingly, in the process of rotation of the protrusion 220 relative to the limit column 120 (i.e., the calibration member 100), the third marking portion 230 also rotates relative to the first marking portion 131 and the second marking portion 132. If the third marking portion 230 rotates to the outside of the first marking portion 131 away from the second marking portion 132, or the third marking portion 230 rotates to the outside of the second marking portion 132 away from the first marking portion 131, it means that after the torsion spring 900 is installed on a product such as a door lock, the horizontality of the handle does not meet the requirements. Conversely, if the third marking portion 230 always rotates between the first marking portion 131 and the second marking portion 132, it means that after the torsion spring 900 is installed on a product such as a door lock, the horizontality of the handle meets the requirements.

[0042] In addition, it should be noted that, since the base 110 is a closed ring structure as a whole, the range spanned by the first marking portion 131 and the second marking portion 132 includes a specific range and another non-specific range. Taking the above example as an example, the 1.6° between the first marking portion 131 and the second marking portion 132 is the aforementioned specific range. Only when the third marking portion 230 is located in the aforementioned specific range between the first marking portion 131 and the second marking portion 132, it can be considered that the torsion spring 900 can make the handle level meet the requirements. When the third marking portion 230 rotates to the aforementioned non-specific range, it is considered that the torsion spring 900 cannot make the handle level meet the requirements.

[0043] The embodiment of the present application discloses a check fixture, which is used to check whether the handle can be horizontally aligned with the requirements after the torsion spring 900 is installed on a door lock or other product. The screwing member 200 in the check fixture is assembled with the calibration member 100, and the two are mutually limited in the radial direction of the torsion spring 900, and can rotate relative to each other in the winding direction of the torsion spring 900. The first torsion arm 910 and the second torsion arm 920 of the torsion spring 900 can be respectively clamped on the opposite sides of the limiting column 120 of the calibration member 100. Since the limiting column 120 and the protrusion 220 on the screw member 200 span the same angle in the winding direction of the torsion spring 900, that is, the circumferential direction of the base 110, after the protrusion 220 is clamped between the first torsion arm 910 and the second torsion arm 920, if the third marking portion 230 on the screw member 200 can only be fixed or moved between the first marking portion 131 and the second marking portion 132, it means that the torsion spring 900 can make the horizontality of the handle meet the requirements. On the contrary, if the third marking portion 230 exceeds the range marked by the first marking portion 131 and the second marking portion 132 during the rotation of the protrusion 220 relative to the limiting column 120, it means that the torsion spring 900 cannot make the corresponding handle meet the horizontality requirements.

[0044] As described above, the present application provides a testing fixture, which can relatively easily test whether the torsion spring 900 can ensure that the horizontality of the corresponding handle meets the requirements. The testing fixture has a simple structure and is easy to use. In addition, the detection accuracy and reliability are relatively high, and it can reflect the actual assembly status of the torsion spring 900, so as to ensure that the torsion spring 900 tested by the testing fixture can meet the corresponding requirements for the horizontality of the handle after being assembled on products such as door locks, and ensure that products such as door locks can be used normally.

[0045] As mentioned above, taking into account the influence of processing accuracy and other factors, even if the torsion spring 900 has certain size and shape errors, it may still meet the design requirements of products such as door locks. In this case, after the torsion spring 900 is installed on the handle, the horizontality of the handle can be limited by other devices or structures so that the handle may be raised or lowered to a certain extent. Of course, the angles of the rise or fall meet the design requirements, thereby eliminating the errors of the torsion spring 900 to a certain extent.

[0046] However, if affected by parameters such as the shape and size of the torsion spring 900, after the torsion spring 900 is installed on the handle, the handle may both rise and droop, that is, when the third marking portion 230 is directly opposite to the angle bisector between the first marking portion 131 and the second marking portion 132, the boss and the first torsion arm 910 and the second torsion arm 920 are spaced apart from each other, so that the screw member 200 can rotate clockwise relative to the calibration member 100 (causing the handle to rise or droop), and can also rotate counterclockwise relative to the marking portion (causing the handle to droop or rise). At this time, even if other structures are used to make the handle present a certain rising (or drooping) state after assembly to eliminate the rising (or drooping) gap error of the handle, the handle can still rotate in the drooping (or rising) direction relative to the limiting structure of the door lock, resulting in the handle still having a corresponding virtual angle. Regarding the aforementioned virtual angle, in layman's terms, even if the handle does not compress the torsion spring 900, it can still rotate relative to the door lock (or door), which causes the handle to shake uncontrollably, thereby adversely affecting the normal use of products such as door locks. Therefore, during the design process, it is usually necessary to impose corresponding restrictions on the virtual angle of the handle to prevent the virtual angle of the handle from being too large, thereby hindering the normal use of products such as door locks.

[0047] To this end, the inspection tool disclosed in the embodiment of the present application also includes a virtual angle detection member 300, and the virtual angle detection member 300 can rotate relative to the calibration member 100 and the screw member 200 in the circumferential direction of the base 110, so as to use the virtual angle detection member 300 to detect whether the virtual angle of the torsion spring 900 meets the requirements. Specifically, the virtual angle detection member 300 is provided with a fourth marking portion 301 and a fifth marking portion 302, and the fourth marking portion 301 and the fifth marking portion 302 are arranged at intervals in the circumferential direction of the base 110, that is, the fourth marking portion 301 and the fifth marking portion 302 are sandwiched to form a specific range, and of course, the other side of the two is also sandwiched to form a non-specific range. When the virtual angle of the torsion spring 900 does not exceed the aforementioned specific range, it is considered that the virtual angle of the torsion spring 900 meets the design requirements, otherwise, it is considered that the virtual angle of the torsion spring 900 does not meet the design requirements.

[0048] Of course, in order to ensure that the virtual position angle has the corresponding detection significance, it is necessary to make the angle between the fourth marking portion 301 and the fifth marking portion 302 (i.e., the angle spanned by the specific ranges of the above two) smaller than the angle between the first marking portion 131 and the second marking portion 132 (i.e., the angle spanned by the specific ranges of the above two). More specifically, the angle between the fourth marking portion 301 and the fifth marking portion 302 can be made smaller than half of the angle between the first marking portion 131 and the second marking portion 132, which can further improve the accuracy of the torsion spring 900, and thus improve the performance of products such as door locks using the torsion spring 900. For example, when the angle between the first marking portion 131 and the second marking portion 132 is 1.6°, the angle between the fourth marking portion 301 and the fifth marking portion 302 can be specifically 0.6°.

[0049] Based on the above virtual position angle detection member 300, during the detection process of the torsion spring 900, it is possible to first detect whether the horizontality of the handle corresponding to the torsion spring 900 meets the requirements. If the above detection result does not meet the requirements, there is no need to perform the virtual position angle detection process, thereby saving detection time and other costs. Correspondingly, if the above detection result meets the requirements, the virtual position angle can be further detected.

[0050] Specifically, before the test, the stop post 120 and the projection 220 are both sandwiched between the first torsion arm 910 and the second torsion arm 920. At this time, generally, the projection 220 can rotate clockwise and / or counterclockwise relative to the stop post 120. Of course, if the projection 220 can neither rotate clockwise nor counterclockwise relative to the stop post 120, it can be considered that the virtual angle of the torsion spring 900 also meets the design requirements. In addition, when the third marking portion 230 is aligned with the angle bisector between the first marking portion 131 and the second marking portion 132, if the projection 220 can only rotate clockwise or counterclockwise relative to the stop post 120, it can also be considered that the virtual angle of the torsion spring 900 meets the requirements, and by limiting the horizontality of the handle accordingly, the installed handle is slightly raised or drooped, which can also ensure that the installed handle will not shake relative to other parts of the door lock.

[0051] To this end, the following description will be made by taking the case where the third marking portion 230 is aligned with the angle bisector between the first marking portion 131 and the second marking portion 132, and the projection 220 can rotate relative to the limiting column 120 in the clockwise direction or in the counterclockwise direction. In detail, by rotating the projection 220 relative to the limiting column 120 in the clockwise (or counterclockwise) direction to the limit position, taking the first torsion arm 910 as an example, when the projection 220 rotates to the limit position, the projection 220 and the first torsion arm 910 are in a mutually limited state, and at this time, the projection 220 and the second torsion arm 920 are spaced from each other. Afterwards, by rotating the virtual angle detection member 300, the fourth mark portion 301 of the virtual angle detection member 300 is aligned with the third mark portion 230 as an initial calibration; then, by rotating the screw member 200 in the opposite direction, and when the protrusion 220 is rotated to another extreme position, that is, when the protrusion 220 and the second torsion arm 920 are mutually limited, the positional relationship between the third mark portion 230 and the fifth mark portion 302 is observed. If the third mark portion 230 is rotated to the side of the fifth mark portion 302 away from the fourth mark portion 301, that is, the third mark portion 230 is beyond the specific range of the fourth mark portion 301 and the fifth mark portion 302, it is considered that the virtual angle of the torsion spring 900 does not meet the requirements. Conversely, if the third mark portion 230 rotates from the fourth mark portion 301 to the position close to the fifth mark portion 302 but does not exceed the fifth mark portion 302, it is considered that the virtual angle of the torsion spring 900 meets the requirements.

[0052] Of course, in the process of rotating the virtual angle detection part 300, it is necessary to determine the relative positions of the fourth marking part 301 and the fifth marking part 302 according to the rotation direction of the screwing part 200 when it is rotated to the extreme position for the first time, so as to ensure that in the process of the screwing part 200 moving from one extreme position (that is, the state of mutual limitation with the first torsion arm 910) to another extreme position (that is, the state of mutual limitation with the second screwing part), the third marking part 230 can be rotated to a specific range between the fourth marking part 301 and the fifth marking part 302.

[0053] In order to further improve the detection capability of the inspection tool disclosed in the embodiment of the present application, a corresponding scale can be formed between the first marking portion 131 and the second marking portion 132, and the scale includes a zero-degree line, and positive and negative scales on opposite sides of the zero-degree line, wherein one of the positive and negative scales represents the angle at which the handle rises relative to the horizontal plane after the torsion spring 900 is applied to the handle, and the other represents the angle at which the handle droops relative to the horizontal plane after the torsion spring 900 is applied to the handle. Similarly, a corresponding scale can also be formed between the fourth marking portion 301 and the fifth marking portion 302, and one of the fourth marking portion 301 and the fifth marking portion 302 can be used as the zero-degree line, or a double-layer scale line can be formed, that is, the fourth marking portion 301 and the fifth marking portion 302 are used as the zero-degree line respectively, and the extension directions of the two scales are reversed, which can further improve the detection capability and detection accuracy of the inspection tool disclosed in the embodiment of the present application.

[0054] As described above, in the process of using the inspection tool disclosed in the embodiment of the present application to inspect the torsion spring 900, the third marking portion 230 is used to correspond to the calibration piece 100 and the virtual angle detection piece 300 respectively. Furthermore, in order to further improve the convenience of using the inspection tool, based on the above embodiment, two third marking portions 230 can be provided on the screwing piece 200, and the two third marking portions 230 are arranged at intervals along the circumference of the base 110, so that one of the two third marking portions 230 is used to cooperate with the calibration piece 100, and the other is used to cooperate with the virtual angle detection piece 300. This can reduce the difficulty of cooperation between the third marking portion 230 and the calibration piece 100 and the virtual angle detection piece 300, and in the process of aligning the third marking portion 230, the alignment accuracy between the third marking portion 230 and the first marking portion 131, the second marking portion 132, the fourth marking portion 301 and the fifth marking portion 302 can be improved, so as to further improve the detection accuracy of the inspection tool. More specifically, the two third marking portions 230 may be spaced 180° apart.

[0055] As described above, the virtual position angle detection member 300 can rotate relative to the calibration member 100 and the screw member 200. Optionally, the virtual position angle detection member 300 can be a sheet-like structure, and can be sleeved outside the body 210 of the screw member 200, so that the virtual position angle detection member 300 can rotate relative to the calibration member 100 and the screw member 200. In another embodiment of the present application, the virtual position angle detection member 300 can also be sleeved outside the base 110, which can improve the assembly reliability between the various components in the entire inspection tool.

[0056] Based on the above embodiments, more specifically, the calibration component 100 can include a first protruding portion 140, and the first protruding portion 140 is protrudingly arranged on a side of the base 110 where the limiting column 120 is located (this side can be recorded as the upper side surface of the base 110), and by providing the first marking portion 131 and the second marking portion 132 on the first protruding portion 140, the alignment difficulty between the third marking portion 230 and the first marking portion 131 and the second marking portion 132 on the main body 210 located above the upper side surface of the base 110 is relatively lower, thereby reducing the difficulty for the staff to observe the relative position between the third marking portion 230 and the first marking portion 131 and the second marking portion 132, thereby improving the detection accuracy of the inspection fixture. Of course, in the process of forming the first marking portion 131 and the second marking portion 132, both can be formed on the top surface of the first protrusion 140, that is, the side surface of the first protrusion 140 facing away from the substrate 110. Correspondingly, the third marking portion 230 can also be set on the side surface of the main body 210 facing away from the substrate 110 to further reduce the difficulty of observation for the staff.

[0057] Based on the above structure of the calibration piece 100, when the virtual angle detection piece 300 is sleeved outside the base 110, the virtual angle detection piece 300 can include a fixedly connected cylinder 310 and a second protrusion 320, wherein the cylinder 310 can be sleeved on the outside of the base 110. Of course, when the cylinder 310 is sleeved outside the base 110, the cylinder 310 and the base 110 can form a mutually limited matching relationship in the radial direction of the torsion spring 900, and the cylinder 310 and the base 110 can move relative to each other in the winding direction of the torsion spring 900, thereby ensuring that the virtual angle detection piece 300 can rotate relative to the calibration piece 100 to detect whether the virtual angle of the torsion spring 900 meets the requirements.

[0058] At the same time, after the cylinder 310 is sleeved outside the base 110, at least a portion of the second protrusion 320 can extend to the side of the base 110 where the limiting column 120 is located, that is, the second protrusion 320 can extend to above the upper side of the base 110, thereby reducing the distance between the top surface of the second protrusion 320 and the top surface of the body 210 in the torsional axial direction of the torsion spring 900, and the second protrusion 320 also extends in the direction close to the center of the base 110, that is, the second protrusion 320 not only extends above the base 110, but also protrudes from the upper side of the base 110, and also extends from the outer side of the base 110 to the inner side (i.e., the center) of the base 110, so as to reduce the distance between the second protrusion 320 and the center of the base 110. In this case, the inspection tool of the body 210 and the second protrusion 320 in the radial direction of the torsion spring 900 can also be reduced accordingly. Correspondingly, by arranging both the fourth marking portion 301 and the fifth marking portion 302 on the second protrusion portion 320, it is easier for the staff to observe the correspondence between the third marking portion 230 and the virtual angle detection member 300. Of course, the fourth marking portion 301 and the fifth marking portion 302 can also be arranged on the top surface of the second protrusion portion 320, that is, the side surface facing away from the substrate 110, so as to further improve the alignment accuracy between the third marking portion 230 and the fourth marking portion 301 and the fifth marking portion 302.

[0059] More specifically, the base 110 can be made into a generally circular columnar structure, and the virtual angle detection component 300 can be made into a closed ring structure as a whole. At the same time, by making the main body 210 into a generally circular structural component, and by designing the radial dimensions of the main body 210, the first protrusion 140 and the second protrusion 320 in the torsion spring 900, the position of a third marking portion 230 on the main body 210 can be spliced ​​with the inner edge of the first protrusion 140, and the position of another third marking portion 230 on the main body 210 can be spliced ​​with the inner edge of the second protrusion 320, thereby maximizing the matching accuracy between the third marking portion 230 and the calibration component 100 and the virtual angle detection component 300.

[0060] As described above, the virtual position angle detection member 300 can be sleeved outside the base 110. In order to prevent the virtual position angle detection member 300 from rotating uncontrollably relative to the base 110 during the operation of the inspection tool, resulting in detection failure, in a specific embodiment of the present application, the inspection tool may further include a damping member 400, one end of the damping member 400 abuts against the base 110, and the other end of the damping member 400 abuts against the inner side of the virtual position angle detection member 300, so that the damping member 400 provides a damping effect in the radial direction of the torsion spring 900 to prevent the virtual position angle detection member 300 from rotating uncontrollably relative to the base 110.

[0061] The damping member 400 can specifically be a compression spring, and by providing a through hole on the base 110, one end of the compression spring passes through the through hole and abuts against the inner wall of the base 110, and correspondingly, the other end of the compression spring can abut against the inner wall of the virtual angle detection member 300, so that the compression spring can provide damping for the virtual angle detection member 300 to limit the uncontrolled rotation of the virtual angle detection member 300 relative to the base 110.

[0062] In another embodiment of the present application, the damping member 400 may further include a ball, and the ball abuts against one end of the compression spring. By making the inner side of the virtual angle detection member 300 roll with the ball, the virtual angle detection member 300 can rotate relatively smoothly during the process of being controlled and rotating relative to the base 110, and the assembly stability of the damping member 400 can be relatively higher.

[0063] In a further embodiment of the present application, a blind hole 111 can be formed on the outer side of the base 110, and the damping member 400 can be installed in the blind hole 111. On the one hand, this can reduce the difficulty of installing the damping member 400 and the difficulty of processing the base 110. On the other hand, the side wall of the blind hole 111 can be used to provide limiting and guiding functions for the damping member 400, thereby improving the working reliability of the damping member 400.

[0064] As described above, the virtual angle detection member 300 can be sleeved outside the base 110. In order to improve the integrity of the inspection tool disclosed in the embodiment of the present application, in a specific embodiment of the present application, a support ridge 150 is further provided on the outer side of the base 110, and in the rotation axis direction of the screwing member 200, the virtual angle detection member 300 can be supported on the support ridge 150, so that when the base 110 is placed vertically or substantially vertically, the virtual angle detection member 300 can be installed from the top of the base 110 to the outside of the base 110, and the support ridge 150 can support the virtual angle detection member 300, thereby limiting the virtual angle detection member 300 from being separated from the base 110. In addition, in the process of using the inspection tool disclosed in the embodiment of the present application to inspect the torsion spring 900, the staff can hold the entire inspection tool by holding the aforementioned support ridge 150, which will not hinder the normal use of the inspection tool, and can ensure that the components in the inspection tool can maintain a relatively stable assembly relationship.

[0065] When the base 110 is a cylindrical structure, the support flange 150 can specifically be a circular ring-shaped structural part. Of course, during the processing of the calibration part 100, the calibration part 100 can be formed in an integrated manner, and the outer side of the base 110 is provided with a support flange 150. Similarly, by designing parameters such as the inner diameter of the virtual angle detection part 300, it can be ensured that after the virtual angle detection part 300 is sleeved on the base 110, it can be ensured that the virtual angle detection part 300 can be mutually limited with the base 110 in the radial direction of the torsion spring 900, and the virtual angle detection part 300 can be mutually limited with the support flange 150 in the axial direction of the torsion spring 900.

[0066] As described above, the screwing member 200 may be provided with a through hole, and the calibration member 100 is connected to the screwing member 200 by plugging and fitting, so that the two can limit each other in the radial direction of the torsion spring 900. In another embodiment of the present application, a plug-in hole can be formed on the calibration member 100, and the screwing member 200 includes a plug-in column 240, and the plug-in column 240 is plugged into the plug-in hole, and the dimensions of the two are designed so that the plug-in column 240 and the plug-in hole can be matched in the radial limit position of the torsion spring 900, and the two can be movably matched in the circumferential direction of the base 110. In the case of adopting this technical solution, it is easier to form other structures on the side of the screwing member 200 away from the protrusion 220, such as the gripping portion 250 mentioned below, and in this case, when the screwing member 200 is plugged into the plug-in hole of the calibration member 100, the difficulty of assembling the two can be reduced to a certain extent.

[0067] As described above, a clamping member may be provided on the calibration portion to make the assembly stability between the torsion spring 900 and the calibration member 100 relatively higher. In the embodiment of the present application, the calibration member 100 may include a plug sleeve 160, and the plug sleeve 160 may be protrudingly provided on the side of the base 110 where the limit column 120 is located, and a plug hole may be provided on the inner side of the plug sleeve 160. In this case, by designing the outer diameter of the plug-in sleeve 160 and the size between the plug-in sleeve 160 and the limit column 120, when the first torsion arm 910 and the second torsion arm 920 are respectively clamped on opposite sides of the limit column 120, the spring body 930 of the torsion spring 900 can be sleeved on the outside of the plug-in sleeve 160, and the spring body 930 and the plug-in sleeve 160 form a certain limiting matching relationship, which can ensure that the assembly stability between the torsion spring 900 and the calibration piece 100 is relatively high, and further, it is no longer necessary to set devices such as the above-mentioned clamping parts on the base 110 to limit the position of the torsion spring 900, thereby further reducing the processing difficulty of the calibration piece 100 and the entire inspection fixture, and can also reduce the assembly difficulty between the torsion spring 900 and the calibration piece 100.

[0068] As described above, the limiting post 120 and the plug sleeve 160 are both protrudingly arranged on the upper side of the base 110. In this case, the height of the plug sleeve 160 can be made greater than the height of the limiting post 120, and the side of the body 210 facing the base 110 can be made flat, so as to reduce the processing difficulty of the screw 200. In this case, after the screw 200 is installed on the calibration member 100, after the body 210 and the plug sleeve 160 are mutually limited, the body 210 is still spaced from the limiting post 120, which can prevent the body 210 and the limiting post 120 from rubbing against each other during the rotation of the body 210 relative to the calibration member 100, thereby adversely affecting the matching stability between the torsion spring 900 and the limiting post 120. In other words, in the embodiment of the present application, the distance between the body 210 and the limiting post 120 is greater than the distance between the body 210 and the plug sleeve 160. Of course, in the embodiment of the present application, the height of the plug sleeve 160 is not necessarily greater than the height of the limiting column 120. By designing the structure of the surface of the body 210 facing the base 110 accordingly, the height of the plug sleeve 160 can be equal to or less than the height of the limiting column 120. The heights of the plug sleeve 160 and the limiting column 120 refer to the dimensions of the two in the axial direction of the torsion spring 900.

[0069] As described above, the screwing member 200 can rotate relative to the calibration member 100. In order to facilitate the staff to rotate the screwing member 200, in a specific embodiment of the present application, the screwing member 200 may also include a gripping portion 250, which is protruding from the side of the body 210 away from the protrusion 220, so that the staff can reduce the difficulty of rotating the screwing member 200 by grasping the gripping portion 250, so as to further reduce the difficulty of using the inspection tool. Specifically, the gripping portion 250 can be a rod-shaped or block-shaped structure, or the gripping portion 250 can also be a plate-shaped structure, which enables the staff to grasp the entire screwing member 200 through the gripping portion 250 protruding from the surface of the body 210, so as to reduce the difficulty of rotating the screwing member 200.

[0070] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0071] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A test fixture for testing a torsion spring, the torsion spring comprising a first torsion arm, a second torsion arm and a spring body, the first torsion arm and the second torsion arm being connected to opposite ends of the spring body, respectively, characterized in that: The inspection tool comprises: The calibration piece comprises a base and a limiting column, the base is provided with a first marking portion and a second marking portion, the first marking portion and the second marking portion are arranged at intervals along the circumference of the base, the limiting column is protrudingly arranged on the base, and the first torsion arm and the second torsion arm can be clamped on opposite sides of the limiting column; A screwing piece, the screwing piece includes a main body and a protrusion, the main body and the base cooperate with the radial upper limit of the torsion spring, and the main body and the base can rotate relative to each other in the circumferential direction of the base, the main body is provided with a third marking portion, the protrusion is fixedly connected to the main body, and the angle spanned by the protrusion and the limiting column in the circumferential direction is equal, and the protrusion is used to be clamped between the first torsion arm and the second torsion arm.

2. The gauge according to claim 1, characterized in that: The inspection tool also includes a virtual position angle detection member, which can rotate relative to the calibration member and the screw member in the circumferential direction. The virtual position angle detection member is provided with a fourth marking portion and a fifth marking portion, and the fourth marking portion and the fifth marking portion are arranged at intervals in the circumferential direction, and the angle between the fourth marking portion and the fifth marking portion is less than half of the angle between the first marking portion and the second marking portion.

3. The gauge according to claim 2, characterized in that: The number of the third marking portions is two, and the two third marking portions are arranged at intervals along the circumferential direction.

4. The gauge according to claim 3, characterized in that: The calibration member further includes a first protruding portion, the first protruding portion is protrudingly arranged on a side of the base body where the limiting column is located, and the first marking portion and the second marking portion are arranged on the first protruding portion; The virtual position angle detection component includes a fixedly connected cylinder and a second protrusion, the cylinder is sleeved on the outside of the base, at least a part of the second protrusion extends to the side of the base where the limit column is located, the second protrusion extends in a direction close to the center of the base, and the fourth marking portion and the fifth marking portion are both arranged on the second protrusion.

5. The gauge according to claim 2, characterized in that: The inspection tool further comprises a damping member, the virtual position angle detection member is sleeved outside the base, one end of the damping member abuts against the base, and the other end of the damping member rollably abuts against the inner side of the virtual position angle detection member.

6. The gauge according to claim 5, characterized in that: A blind hole is arranged on the outer side of the base body, and the damping element is installed in the blind hole.

7. The gauge according to claim 2, characterized in that: The virtual position angle detection member is sleeved outside the base, and a supporting convex edge is provided on the outer side of the base. In the rotation axis direction of the screwing member, the virtual position angle detection member can be supported on the supporting convex edge.

8. The gauge according to claim 1, characterized in that: The calibration part includes a plug-in sleeve protruding from the side of the base where the limit column is located, and the screwing part includes a plug-in column. The plug-in sleeve is provided with a plug-in hole, and the plug-in column is plugged into the plug-in hole. The plug-in column and the plug-in hole cooperate in the radial upper limit position of the torsion spring and movably cooperate in the circumferential direction.

9. The gauge according to claim 8, characterized in that: In the axial direction of the plug hole, the distance between the body and the limiting column is greater than the distance between the body and the plug sleeve.

10. The gauge according to claim 1, characterized in that: The screwing member further comprises a holding portion, and the holding portion is protrudingly arranged on a side of the body away from the protrusion.

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