Electric screwdriver

Abstract

The application provides an electric tightening tool. The electric tightening tool comprises a shell, a lamp plate fixing member and a lamp plate. The shell is provided with a lamp slot. The lamp plate fixing member comprises a fixing part and a light-transmitting part which are connected with each other. The fixing part is arranged in the shell and connected with the shell. The light-transmitting part is embedded in the lamp slot and at least partially exposed to the lamp slot. The fixing part comprises a first fixing column. The lamp plate is arranged in the shell. The lamp plate comprises a hard circuit board and a light-emitting member. The hard circuit board is connected to the side of the first fixing column which is away from the shell. The light-emitting member is mounted on the surface of the hard circuit board which faces the light-transmitting part and has a gap with the light-transmitting part. The light-emitting side of the light-emitting member faces the light-transmitting part, so that the light emitted by the light-emitting member is emitted to the outside of the shell through the light-transmitting part.

Description

Technical Field

[0001] This application relates to the field of electric tightening tools, and more particularly to an electric tightening tool. Background Technology

[0002] The indicator light structure of electric tightening tools is typically a ring structure, specifically, a flexible circuit board is attached to the inner surface of a ring-shaped light post, and LEDs are mounted on the flexible circuit board. The light emitted by the LEDs shines outward through the light post. However, because the flexible circuit board is bent and attached to the inner surface of the LEDs, the LED package and its solder joints are subjected to continuous bending and torsional stresses. This can cause cracks in the LED package, and the solder joints may experience connection failures such as poor soldering or cracking, leading to open circuits or poor contact in the LEDs, thus affecting the normal operation of the indicator light. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this application provides an electric tightening tool.

[0004] This application provides an electric tightening tool, comprising a housing, a lamp plate fixing member, and a lamp plate. The housing has a lamp groove. The lamp plate fixing member includes a fixing part and a light-transmitting part connected to each other. The fixing part is located inside and connected to the housing. The light-transmitting part is embedded in the lamp groove and at least partially exposed outside the lamp groove. The fixing part includes a first fixing post. The lamp plate is located inside the housing and includes a rigid circuit board and a light-emitting element. The rigid circuit board is connected to the side of the first fixing post facing away from the housing. The light-emitting element is mounted on the surface of the rigid circuit board facing the light-transmitting part and has a gap with the light-transmitting part. The light-emitting side of the light-emitting element faces the light-transmitting part, so that the light emitted by the light-emitting element exits through the light-transmitting part to the outside of the housing.

[0005] The electric tightening tool provided in this application uses the rigid circuit board as the carrier base of the light-emitting element, and fixes the rigid circuit board to the housing through the fixing part. The rigid circuit board does not need to be bent or deformed during assembly. The package of the light-emitting element and its solder joints do not bear bending stress and torsional stress during installation and use, avoiding problems such as cracks in the LED package, poor soldering or cracking of solder joints, and open circuits or poor contact of LEDs caused by bending of the flexible circuit board, which significantly improves the reliability and service life of the indicator light.

[0006] Furthermore, in related technologies, to fix the flexible circuit board, it is tightly attached to the inner surface of the lamp post. This results in the lamp beads being too close to the lamp post, preventing the light from mixing and scattering properly. Consequently, the emitted light halo exhibits obvious bright and dark areas, creating visual unevenness and affecting the operator's ability to identify the indicator light. This application addresses this by placing the rigid circuit board on the side of the first fixing post away from the housing. The axial dimension of the first fixing post allows for a certain distance between the rigid circuit board and the light-transmitting part, creating a gap between the light-emitting element and the light-transmitting part. This gap forms a light-mixing cavity, where the light emitted by the light-emitting element is fully mixed before exiting the light-transmitting part. This results in better light uniformity, effectively eliminating the bright and dark areas, and making the emitted light more uniform and soft, without obvious bright or dark areas. This improves the accuracy and speed of the operator's recognition of the lighting effect. Attached Figure Description

[0007] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the assembled structure of the electric tightening tool in some embodiments of this application.

[0009] Figure 2 For along Figure 1 The diagram shows a partial cross-sectional structure of the electric tightening tool obtained from section II.

[0010] Figure 3 For along Figure 1 The diagram shows a partial cross-sectional structure of the electric tightening tool obtained from section II-II.

[0011] Figure 4 for Figure 1 The diagram shows a partial exploded view of the electric tightening tool.

[0012] Figure 5 This is a schematic diagram showing the relationship between the two lamp slots and the central axis of the housing when viewed along a direction parallel to the central axis of the housing in some embodiments of this application.

[0013] Figure 6 This is a cross-sectional structural diagram of the housing, lamp board fixing member, lamp board, main circuit board, end cover, wire harness, and light diffuser film in other embodiments of this application.

[0014] Figure 7This is a cross-sectional structural diagram of the housing, lamp board fixing member, lamp board, main circuit board, end cover, wire harness, and light-shielding enclosure in some embodiments of this application. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0016] In the description of this application, terms such as "first," "second," etc., are used to distinguish different objects, not to describe a specific order, nor to indicate or imply relative importance or the quantity of indicated technical features. Terms such as "upper," "lower," "inner," "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, "multiple" refers to two or more, "a variety of" refers to two or more types, and "multiple times" refers to two or more times.

[0017] The phrase "some embodiments" and similar expressions described in the embodiments of this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "some embodiments," "other embodiments," "other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiments, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0018] In the description of this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components; it can be a communication connection; or it can be an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. A fixed connection can be a detachable fixed connection or a non-detachable fixed connection.

[0019] It should be noted that the illustrations provided in the embodiments of this application are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] Please see Figures 1 to 4 , Figure 1 This is a schematic diagram of the assembled structure of the electric tightening tool 100 in some embodiments of this application. Figure 2 For along Figure 1 The diagram shown is a partial cross-sectional view of the electric tightening tool 100 obtained from section II. Figure 3 For along Figure 1 The diagram shown is a partial cross-sectional view of the electric tightening tool 100 obtained from section II-II. Figure 4 for Figure 1 The diagram shows a partially exploded view of the electric tightening tool 100. The electric tightening tool 100 includes a housing 10, a lamp plate fixing member 20, and a lamp plate 30. The housing 10 has a lamp groove 11. The lamp plate fixing member 20 includes a fixing part 21 and a light-transmitting part 22 connected to each other. The fixing part 21 is located inside and connected to the housing 10. The light-transmitting part 22 is embedded in the lamp groove 11 and at least partially exposed outside the lamp groove 11. The lamp plate 30 is located inside the housing 10. The lamp plate 30 includes a rigid circuit board 31 and a light-emitting element 32 mounted on the rigid circuit board 31. The light-emitting element 32 is electrically connected to the rigid circuit board 31. The rigid circuit board 31 is connected to the fixing part 21. The light-emitting side of the light-emitting element 32 faces the light-transmitting part, so that the light emitted by the light-emitting element 32 exits through the light-transmitting part 22 to the outside of the housing 10.

[0021] The electric tightening tool 100 provided in this application embodiment uses the rigid circuit board 31 as the supporting base of the light-emitting element 32, and the rigid circuit board 31 is fixedly connected to the housing 10 through the fixing part 21. The rigid circuit board 31 does not need to be bent or deformed during assembly. The package of the light-emitting element 32 and its solder joints do not bear bending stress and torsional stress during installation and use, avoiding problems such as cracks in the LED package, poor soldering or cracking of solder joints, and open circuits or poor contact of LEDs caused by bending of the flexible circuit board, which significantly improves the reliability and service life of the indicator light.

[0022] In addition, the lamp board 30 and the lamp board fixing member 20 can be pre-assembled as independent components outside the housing 10 and then installed into the housing 10 as a whole, which improves assembly efficiency and avoids the bonding process of flexible circuit boards in a small space.

[0023] The fixing part 21 may be made of a light-transmitting material or an opaque material.

[0024] In some embodiments, the fixing part 21 and the light-transmitting part 22 may be an integral structure. In other embodiments, the fixing part 21 and the light-transmitting part 22 may be separate structures, which can be connected by means of screwing, snapping, riveting, bonding, etc.

[0025] In some embodiments, the light-emitting element 32 may include LED beads, or it may include any other light-emitting device.

[0026] In some embodiments, such as Figures 2 to 4 As shown, the fixing part 21 includes a main body 211, a first fixing post 212, and a second fixing post 213. The main body 211 is connected to the light-transmitting part 22, and the first fixing post 212 and the second fixing post 213 are connected to the main body 211. The rigid circuit board 31 is connected to the side of the first fixing post 212 facing away from the housing 10 and is connected to the first fixing post 212. The light-emitting element 32 is disposed on the surface of the rigid circuit board 31 facing the light-transmitting part 22, and there is a gap G between the light-emitting element 32 and the light-transmitting part 22.

[0027] In related technologies, to fix the flexible circuit board, it is tightly attached to the inner surface of the lamp post. This results in the lamp beads being too close to the lamp post, preventing the light from mixing and scattering properly. Consequently, the resulting halo exhibits obvious bright and dark areas, creating visual unevenness and affecting the operator's ability to identify the indicator lights. To improve this unevenness, related technologies typically abandon the ring light effect and instead use a dot matrix or discrete lamp bead layout. However, this sacrifices the intuitive and continuous visual effect of the ring light band. In this embodiment, by placing the rigid circuit board 31 on the side of the first fixing post 212 away from the housing 10, the axial dimension of the first fixing post 212 allows for a certain distance between the rigid circuit board 31 and the light-transmitting part 22, resulting in a gap G between the light-emitting element 32 and the light-transmitting part 22. This gap G forms a light-mixing cavity, where the light emitted by the light-emitting element 32 is fully mixed before exiting from the light-transmitting part 22, resulting in better light uniformity and effectively eliminating the phenomenon of light and dark partitioning. This makes the emitted light more uniform and soft, without obvious bright or dark areas, improving the operator's accuracy and speed in recognizing the lighting effect. Furthermore, it eliminates the need for a dot-matrix or discrete LED layout to avoid uneven light and dark areas. Of course, in some embodiments, based on product design needs, the light-emitting element 32 of the lamp board 30 may also adopt a dot-matrix or discrete LED layout, but this is not to overcome the defect of uneven light and dark areas.

[0028] In this embodiment, by making reasonable use of the space on the side of the main body 211 away from the housing 10, the first fixing post 212, the rigid circuit board 31 and the light-emitting element 32 are arranged. This not only makes the light-emitting element 32 and the light-transmitting part 22 have the gap G, which can achieve a better uniform light effect, but also improves the utilization rate of the internal space of the housing 10.

[0029] In some embodiments, the projection of the light-emitting element 32 onto the light-transmitting portion 22 is at least partially located within the light-transmitting portion 22, thereby enabling the light from the light-emitting element 32 to illuminate the light-transmitting portion 22 and pass through the light-transmitting portion 22 to exit the housing 10, forming an effective light-emitting path.

[0030] In some embodiments, the projections of the first fixing post 212 and the light-transmitting part 22 on the housing 10 do not overlap, thereby preventing the light emitted by the light-emitting element 32 from being blocked by the first fixing post 212.

[0031] In some embodiments, such as Figure 3 and Figure 4 As shown, the housing 10 is cylindrical and includes a third fixing post 12. The third fixing post 12 protrudes from the inner wall of the housing 10 and is connected to the second fixing post 213. The arrangement direction of the second fixing post 213 and the third fixing post 12 is parallel to the central axis CL1 of the housing 10.

[0032] By arranging the second fixing post 213 and the third fixing post 12 along the extension direction of the central axis CL1 of the housing 10, the axial space of the housing 10 can be fully utilized, which is beneficial to improving the internal space utilization rate of the housing 10.

[0033] In some embodiments, the projections of the second fixing post 213, the third fixing post 12, and the light-transmitting part 22 onto the housing 10 do not overlap, thereby preventing the light emitted by the light-emitting element 32 from being blocked by the second fixing post 213 and the third fixing post 12.

[0034] In some embodiments, the fixing part 21 may include at least one first fixing post 212. When there are two first fixing posts 212, the two first fixing posts 212 are located on opposite sides of the second fixing post 213, and the arrangement direction of the two first fixing posts 212 is parallel to the extension direction of the central axis CL1 of the housing 10.

[0035] In some embodiments, such as Figure 2 and Figure 4As shown, the housing 10 is cylindrical, and the electric tightening tool 100 further includes a first fastener 41. The first fastener 41 passes through the rigid circuit board 31 and the first fixing post 212 in a direction perpendicular to the central axis CL1 of the housing 10 and locks the rigid circuit board 31 and the first fixing post 212.

[0036] By setting the first fastener 41 to pass through the rigid circuit board 31 and the first fixing post 212 in a direction perpendicular to the central axis CL1 of the housing 10, the radial space inside the housing 10 can be fully utilized, which is beneficial to improving the internal space utilization rate of the housing 10.

[0037] The first fastener 41 may be a bolt, screw, stud, etc.

[0038] In other embodiments, the rigid circuit board 31 and the first fixing post 212 can also be connected by means of snap-fitting, riveting, or bonding.

[0039] In some embodiments, such as Figure 3 and Figure 4 As shown, the electric tightening tool further includes a second fastener 42. The second fastener 42 passes through the second fixing post 213 and the third fixing post 12 along the extension direction of the central axis CL1 of the housing 10, and locks the second fixing post 213 and the third fixing post 12. Thus, the second fastener 42 can at least axially fix the second fixing post 213 and the third fixing post 12. In addition, the second fastener 42 passing through the second fixing post 213 and the third fixing post 12 along the extension direction of the central axis CL1 of the housing 10 can make full use of the axial space of the housing 10, which is beneficial to improving the utilization rate of the internal space of the housing 10.

[0040] The second fastener 42 can be a bolt, screw, stud, etc.

[0041] In other embodiments, the second fixing post 213 and the third fixing post 12 can also be connected by means of snap-fitting, riveting, or bonding.

[0042] In some embodiments, such as Figure 2 and Figure 3 As shown, the main body 211 is attached to the inner wall of the housing 10. The first fixing post 212 and the second fixing post 213 are located on the side of the main body 211 away from the housing 10. The first fixing post 212 is connected to the rigid circuit board 31, and the second fixing post 213 is connected to the housing 10.

[0043] The main body 211 is attached to the inner wall of the housing 10. Due to its large surface contact area, it helps to prevent the main body 211 from shaking or tilting within the housing 10. The first fixing post 212 and the second fixing post 213 are located on the side of the main body 211 away from the housing 10, which facilitates a compact layout.

[0044] In some embodiments, such as Figure 2 and Figure 3 As shown, the housing 10 is cylindrical, the lamp groove 11 penetrates the side wall of the housing 10 radially, the light-transmitting part 22 is flush with the outer surface of the housing 10, and the surface of the rigid circuit board 31 is parallel to the central axis CL1 of the housing 10.

[0045] By setting the light groove 11 to penetrate the side wall of the housing 10 radially, the light emitted by the light-emitting element 32 can be emitted radially from the side of the housing 10, making it easy for the operator to observe the indicator light from the side of the electric tightening tool 100. By setting the light-transmitting part 22 to be flush with the outer surface of the housing 10, the outer surface is a continuous and smooth surface without obvious protrusions, steps, or groove edges. Dust and oil are less likely to accumulate on the flat surface, avoiding affecting the indicator light's indication effect, facilitating cleaning, avoiding collisions caused by protrusions, and making it easy to hold without affecting the operating feel.

[0046] By setting the surface of the rigid circuit board 31 parallel to the central axis CL1 of the housing 10, it is beneficial for the light-emitting side of the light-emitting element 32 to face the light-transmitting part 22. On the other hand, it can make the radial space occupied by the lamp board 30 inside the housing 10 smaller, making full use of the axial space inside the housing 10, thereby making the internal layout of the electric tightening tool 100 more compact.

[0047] In some embodiments, such as Figures 2 to 4 As shown, the electric tightening tool 100 also includes a main circuit board 50. At least a portion of the main circuit board 50 is located inside and connected to the housing 10. The main circuit board 50 is made of rigid material. The main circuit board 50 is parallel to and electrically connected to the rigid circuit board 31. The parallel arrangement of the main circuit board 50 and the rigid circuit board 31 makes full use of the axial space of the housing 10, resulting in a neat layout and high space utilization.

[0048] In some embodiments, the main circuit board 50 includes a first substrate and a first device disposed on the first substrate, and the rigid circuit board 31 includes a second substrate and a second device disposed on the second substrate.

[0049] In some embodiments, the main circuit board 50 and the rigid circuit board 31 can be manufactured by cutting the same circuit board, thereby reducing manufacturing costs.

[0050] In other embodiments, the main circuit board 50 and the rigid circuit board 31 may also be manufactured separately.

[0051] In some embodiments, such as Figures 2 to 4 As shown, the electric tightening tool 100 further includes an end cap 60 connected to the housing 10. The end cap 60 includes a clamping part 61 disposed within the housing 10, and a portion of the fixing part 21 is clamped between the housing 10 and the clamping part 61. The projections of the clamping part 61 and the light-transmitting part 22 onto the housing 10 do not overlap.

[0052] The clamping part 61 of the end cap 60 extends into the housing 10 and forms a clamping space between it and the inner wall of the housing 10, clamping part of the fixing part 21 therein. This restricts the radial displacement of the light-transmitting part 22 along the housing 10, thereby further enhancing the fixing reliability of the lamp plate fixing member 20 in the housing 10 and forming a double limiting when locked with the first fastener 41.

[0053] In some embodiments, such as Figures 2 to 4 As shown, the end cap 60 also includes a first protrusion 62, which is disposed inside the housing 10 and surrounds the clamping part 61. The end face of the first protrusion 62 abuts against the end face of the fixing part 21, and the outer peripheral surface of the first protrusion 62 abuts against the inner wall of the housing 10.

[0054] The first protrusion 62 can serve as an indicator of the clamping position. That is, when the first protrusion 62 abuts against the end face of the fixing part 21, it indicates that the fixing part 21 is clamped between the housing 10 and the clamping part 61. The installer can obtain clear feedback on the assembly position through the abutting state between the first protrusion 62 and the fixing part 21.

[0055] After the end face of the first protrusion 62 abuts against the end face of the fixing part 21, the first protrusion 62 can axially limit the fixing part 21, further preventing the fixing part 21 from moving axially, thereby improving the connection stability and long-term reliability of the fixing part 21 and the housing 10.

[0056] In other embodiments, there is a gap between the end face of the first protrusion 62 and the end face of the fixing part 21, that is, the first protrusion 62 and the fixing part 21 do not abut against each other.

[0057] In some embodiments, such as Figures 2 to 4As shown, the electric tightening tool 100 also includes a body 95. One end of the housing 10 is connected to the body 95, and the other end of the housing 10 is connected to the end cap 60. The end cap 60 also includes a second protrusion 63, which surrounds the first protrusion 62 and abuts against the end face of the housing 10 away from the body 95. Thus, the second protrusion 63 and the body 95 can press the housing 10 together, achieving axial clamping and fixing of the housing 10 and preventing the housing 10 from shifting axially.

[0058] In some embodiments, such as Figures 2 to 4 As shown, both the housing 10 and the end cap 60 are cylindrical, and the central axis CL2 of the end cap 60 coincides with the central axis CL1 of the housing 10. The coincidence of the central axis CL1 of the end cap 60 and the housing 10 ensures that the circumferential gap is uniform after the end cap 60 is installed in the housing 10, and will not cause uneven clamping force or damage to the fixing part 21 due to misalignment.

[0059] In some embodiments, such as Figure 2 and Figure 3 As shown, the outer peripheral surface of the clamping part 61 near the end of the light-transmitting part 22 includes a guide surface 611. The outer diameter of the guide surface 611 decreases as it approaches the light-transmitting part 22, so that the end of the clamping part 61 forms a tapered guide structure. During the process of installing the end cap 60 into the housing 10, the guide surface 611 first enters the inner cavity of the housing 10, which can guide the end cap 60 to slide smoothly into the housing 10, avoiding jamming or assembly difficulties caused by the initial alignment deviation between the end cap 60 and the housing 10.

[0060] In some embodiments, such as Figures 2 to 4 As shown, the end of the end cap 60 away from the fixing part 21 includes a wire harness opening 64. The electric tightening tool 100 also includes a wire harness 70. The wire harness 70, the rigid circuit board 31 and the main circuit board 50 are electrically connected. At least a portion of the main circuit board 50 is disposed in the housing 10. At least a portion of the wire harness 70 is located in the end cap 60 and extends out from the wire harness opening 64 of the end cap 60.

[0061] The wire harness 70 extends from the wire harness opening 64 of the end cover 60. The wire harness opening 64 serves to gather and constrain the wire harness 70, preventing the wire harness 70 from becoming tangled inside the housing 10 or interfering with the rigid circuit board 31 or the light-emitting element 32.

[0062] In some embodiments, such as Figures 2 to 4As shown, the housing 10 is cylindrical and has at least two lamp slots 11. Two of the lamp slots 11 are symmetrically arranged about the central axis CL1 of the housing 10. There are at least two lamp plate fixing members 20 and at least two lamp plates 30. Each lamp plate fixing member 20 corresponds to one lamp slot 11 and one lamp plate 30. The light-transmitting part 22 of each lamp plate fixing member 20 is embedded in the corresponding lamp slot 11 and at least partially exposed outside the lamp slot 11. The rigid circuit board 31 of each lamp plate 30 is connected to the corresponding fixing part 21. The light-emitting side of the light-emitting element 32 of each lamp plate 30 faces the corresponding light-transmitting part 22.

[0063] The two light slots 11 are symmetrically arranged about the central axis CL1 of the housing 10, and the two light-transmitting parts 22 emit light symmetrically on both sides of the housing 10. The indicator lights are visually symmetrically distributed, which is aesthetically pleasing and easy to observe from multiple angles.

[0064] When there are two lamp panels 30, the two lamp panels 30 are located on opposite sides of the main circuit board 50.

[0065] In some embodiments, the lamp groove 11 extends circumferentially along the housing 10, the lamp groove 11 includes a first end and a second end along the circumferential direction, and the angle between the radial line of the housing 10 passing through the first end of the lamp groove 11 and the radial line passing through the second end of the lamp groove 11 is 90°~150°, for example, 90°, 100°, 120°, 135°, 150°, etc.

[0066] Please see Figure 5 , Figure 5 This is a schematic diagram showing the two lamp slots 11 and the central axis CL1 of the housing 10 when viewed along a direction parallel to the central axis CL1 of the housing 10 in some embodiments of this application. The radial line passing through the first end 111 of the lamp slot 11 is the first radial line L1, and the radial line passing through the second end 112 of the lamp slot 11 is the second radial line L2. The angle between the first radial line L1 and the second radial line L2 is α, where α is a value within the range of 90° to 150°.

[0067] Therefore, when the user holds the electric tightening tool 100 or the electric tightening tool 100 is in front of the user, no matter how the electric tightening tool 100 is rotated to any angle in the circumferential direction, the light-emitting area of ​​at least one of the two light slots 11 is within the user's field of vision, thereby ensuring that the indicator light information in the light slot 11 is always visible.

[0068] In addition, compared with the ring light strip in related technologies, some embodiments of this application only require two rigid circuit boards 31, without the need to set three or more additional rigid circuit boards 31, to achieve a full circumferential coverage visual effect. This reduces the number of rigid circuit boards 31 and the complexity of electrical connections, thereby reducing the overall size of the electric tightening tool 100 and lowering manufacturing costs.

[0069] Please see Figure 6 , Figure 6 This is a cross-sectional structural diagram of the housing 10, lamp board fixing member 20, lamp board 30, main circuit board 50, end cover 60, wiring harness 70, and light diffuser 80 in other embodiments of this application. In some embodiments, such as... Figure 6 As shown, the electric tightening tool 100 further includes at least one light-diffusing film 80, which is disposed on the first surface 221 and / or the second surface 222 of the light-transmitting portion 22. That is, the light-diffusing film 80 is disposed on the first surface 221 and / or the light-diffusing film 80 is disposed on the second surface 222, so that the light emitted by the light-emitting element 32 is diffused by the light-diffusing film 80 and emitted to the outside of the housing 10. The first surface 221 is opposite to the second surface 222, and the first surface 221 faces the light-emitting element 32.

[0070] The light-diffusing film 80 can scatter light uniformly in all directions, so that the light emitted by the light-emitting element 32 can be clearly seen in a wider range of viewing angles.

[0071] In some embodiments, the light-diffusing film 80 includes a light-diffusing agent.

[0072] In other embodiments, the electric tightening tool 100 may not include the light-diffusing film 80, and the light-transmitting portion 22 may include a light-diffusing agent.

[0073] Please see Figure 7 , Figure 7 This is a cross-sectional structural diagram of the housing 10, lamp board fixing member 20, lamp board 30, main circuit board 50, end cover 60, wiring harness 70, and light-shielding enclosure 90 in some embodiments of this application. In some embodiments, such as... Figure 7 As shown, the electric tightening tool also includes a light-shielding enclosure 90. One end of the light-shielding enclosure 90 is connected to the rigid circuit board 31 and surrounds the light-emitting element 32. The other end of the light-shielding enclosure 90 is connected to the fixing part 21. The projection of the light-emitting element 32 on the light-transmitting part 22 is located inside the light-transmitting part 22. The projection of the light-shielding enclosure 90 on the light-transmitting part 22 surrounds the projection of the light-emitting element 32 on the light-transmitting part 22.

[0074] In some embodiments, the number of light-emitting elements 32 of the lamp panel 30 is one or more, and the number of light-shielding walls 90 is one, which surrounds one light-emitting element 32 or at least two light-emitting elements 32.

[0075] In other embodiments, the number of light-emitting elements 32 of the lamp panel 30 is multiple, and the number of light-shielding walls 90 is multiple, with each light-shielding wall 90 surrounding one or at least two light-emitting elements 32.

[0076] The light-shielding enclosure 90 forms a ring-shaped light-isolating barrier around the light-emitting element 32, enclosing the light-emitting element 32 within a closed light channel. This prevents light from leaking from the side into non-target areas or other parts within the housing 10, avoiding stray light interference with the operator. Furthermore, the projection of the light-emitting element 32 is located within the light-transmitting portion 22, and the projection of the light-shielding enclosure 90 surrounds the projection of the light-emitting element 32. This ensures that the light emitted by the light-emitting element 32 can only exit through the area of ​​the light-transmitting portion 22 within the enclosure of the light-shielding enclosure 90, resulting in a clear light path and concentrated light effect.

[0077] In other embodiments, the electric tightening tool 100 may not include the light-shielding enclosure 90.

[0078] In some embodiments, the number of light-emitting elements 32 of the lamp panel 30 is at least two, the number of light-shielding walls 90 is at least two, each light-shielding wall 90 corresponds to one light-emitting element 32, one end of each light-shielding wall 90 is connected to the rigid circuit board 31 and surrounds the corresponding light-emitting element 32, and the other end of the light-shielding wall 90 is connected to the fixing part 21.

[0079] Each light-emitting element 32 corresponds to an independent light-shielding wall 90, and the light paths of each light-emitting element 32 are isolated from each other, so there is no light crosstalk. When multiple light-emitting elements 32 display different colors, the colors of each light-emitting zone are pure, the boundaries are clear, and they do not interfere with each other.

[0080] In some embodiments, the lamp groove 11 may be oval or any other shape, and the outer contour shape of the light-transmitting portion 22 is adapted to the inner contour shape of the lamp groove 11. The surface of the light-transmitting portion 22 away from the light-emitting element 32 may be flush with the outer surface of the housing 10, or it may be concave or convex to the outer surface of the housing 10.

[0081] In some embodiments, the light-emitting element 32 can be used to indicate the working status of the electric tightening tool 100, including but not limited to PASS status, NG status, and standby status. PASS status may indicate that the tightening is successful, such as being fully tightened or without stripping, while NG status may indicate that the tightening is unsuccessful, such as not tightened enough, over-tightened, or with stripped threads. The light-emitting element 32 can also be used for illumination.

[0082] In some embodiments, the electric tightening tool 100 further includes a controller, which is disposed on and electrically connected to the main circuit board 50. The controller is electrically connected to the light-emitting element 32 through the main circuit board 50 and the rigid circuit board 31. The controller is used to determine a target light-emitting signal based on the current working state of the electric tightening tool 100 and send the target light-emitting signal to the light-emitting element 32. The target light-emitting signal includes color information and / or brightness information corresponding to the current working state of the electric tightening tool 100. When the light-emitting element 32 receives the light-emitting signal, it emits light based on the light-emitting signal, so that the operator can know the current working state of the electric tightening tool 100 based on the color and / or brightness of the light emitted by the light-emitting element 32.

[0083] In some embodiments, the body 95 includes a tool head, a power assembly, and a sensor assembly. The power assembly drives the tool head to move, and the sensor assembly collects operating parameters of the electric tightening tool 100 during operation. A controller is electrically connected to the power assembly and sensor assembly via the main circuit board 50. The controller acquires the operating parameters collected by the sensor assembly and controls the operating state of the power assembly.

[0084] In some embodiments, the first fixed post 212 is a telescopic structure that can move in a direction close to or away from the light-transmitting part 22, thereby causing the light-emitting element 32 to move closer to or away from the light-transmitting part 22, so as to adjust the size of the gap G between the light-emitting element 32 and the light-transmitting part 22.

[0085] In some embodiments, the retractable structure includes a drive device and a transmission assembly. The drive device is electrically connected to the controller, and the transmission assembly is connected to the rigid circuit board 31. The drive device drives the transmission assembly to move in a direction closer to or away from the light-transmitting portion 22, thereby causing the rigid circuit board 31 and the light-emitting element 32 to move closer to or away from the light-transmitting portion 22. The drive device includes, but is not limited to, a micro motor, and the transmission assembly includes, but is not limited to, a threaded sleeve. In other embodiments, the retractable structure may be a piezoelectric stack, a shape memory alloy spring, etc.

[0086] In some embodiments, the controller can be used to determine whether the light-emitting element 32 has experienced light decay. Specifically, the controller acquires the positive voltage across the light-emitting element 32. If the voltage difference between the positive voltage and the initial positive voltage exceeds the difference threshold, it is determined that the light-emitting element 32 has experienced light decay, and a first target gap value is determined based on the voltage difference.

[0087] The electric tightening tool 100 may include a first distance sensor disposed on the light-transmitting part 22, used to detect the gap value between the light-emitting element 32 and the light-transmitting part 22 and feed it back to the controller. The controller is also used to control the telescopic structure to move in a direction close to the light-transmitting part 22 when the light-emitting element 32 experiences light decay, thereby bringing the light-emitting element 32 closer to the light-transmitting part 22, and to control the telescopic structure to stop moving when the gap value between the light-emitting element 32 and the light-transmitting part 22 detected by the distance sensor is the first target gap value.

[0088] After long-term use, the light-emitting element 32 may experience light decay, resulting in insufficient emitted brightness. By using the telescopic structure to reduce the gap G between the light-emitting element 32 and the light-transmitting part 22, the light mixing distance can be reduced, the light propagation loss in the light mixing cavity can be reduced, and the emitted brightness can be improved. This can extend the service life of the light-emitting element 32, extend the replacement time of the lamp board 30, and extend the overall machine repair time.

[0089] In some embodiments, the electric tightening tool 100 may include a second distance sensor for detecting the distance between the operator and the electric tightening tool 100. The controller may be used to control the retractable structure to move away from the light-transmitting portion 22 when the distance detected by the second distance sensor is less than the lower limit of a preset distance range, thereby increasing the distance between the light-emitting element 32 and the light-transmitting portion 22; and to control the retractable structure to move closer to the light-transmitting portion 22 when the distance detected by the second distance sensor is greater than the upper limit of the preset distance range, thereby decreasing the distance between the light-emitting element 32 and the light-transmitting portion 22.

[0090] When the operator is too close to the electric tightening tool 100, increasing the distance between the light-emitting element 32 and the light-transmitting part 22 can make the emitted light softer and less glaring. When the operator is too far from the electric tightening tool 100, decreasing the distance between the light-emitting element 32 and the light-transmitting part 22 can concentrate the light and improve long-distance visibility.

[0091] In some embodiments, the lamp panel 30 includes a plurality of light-emitting elements 32, and the controller is further configured to detect the light-emitting state of the plurality of light-emitting elements 32 when controlling the light-emitting elements 32 on the lamp panel 30 to emit light; when at least one of the light-emitting elements 32 is detected not emitting light, determine that the at least one light-emitting element 32 is damaged, and determine the number and location of the damaged light-emitting elements 32; determine a second target gap value based on the number and location of the damaged light-emitting elements 32; and control the telescopic structure to move so as to adjust the gap value between the light-emitting element 32 and the light-transmitting part 22 to the second target gap value.

[0092] In some embodiments, the controller is configured to: when the number of damaged light-emitting elements 32 is less than a first preset number and the damaged light-emitting elements 32 are dispersed, set the second target gap value to be greater than the current gap value to increase the light diffusion range of the normal light-emitting elements 32, so that the light emitted by the normal light-emitting elements 32 diffuses to the light-emitting area of ​​the damaged light-emitting elements 32; when the number of damaged light-emitting elements 32 is greater than the first preset number and the damaged light-emitting elements 32 are concentrated, set the second target gap value to be less than the current gap value to improve the emitted brightness of the normal light-emitting elements 32.

[0093] In some embodiments, the controller is configured to determine the distribution type of the damaged light-emitting elements 32 by: detecting whether there is another damaged light-emitting element 32 at an adjacent position of each damaged light-emitting element 32; if so, counting it as an adjacent fault pair; counting the total number M of adjacent fault pairs; counting the total number K of damaged light-emitting elements 32; calculating the degree of clustering C=M / K; and determining the distribution type based on the degree of clustering C.

[0094] In some embodiments, when 0 ≤ C < 0.5, the distribution type of the damaged light-emitting element 32 is determined to be a dispersed distribution; when C ≥ 0.5, the distribution type of the damaged light-emitting element 32 is determined to be a concentrated distribution.

[0095] In some embodiments, the light panel 30 includes multiple light-emitting zones, each light-emitting zone including at least one light-emitting element 32, and the controller is used to control each light-emitting zone to emit light with light-emitting parameters corresponding to each light-emitting zone, the light-emitting parameters including one or more of color, brightness, lighting sequence, and light-emitting duration.

[0096] In some embodiments, there are multiple light-shielding walls 90, each surrounding a light-emitting zone. The physical isolation provided by the light-shielding walls 90 allows the light signals of each light-emitting zone to be spatially separated, preventing interference and avoiding crosstalk between adjacent light-emitting zones.

[0097] In some other embodiments, the first fixed post 212 may not have a telescopic function.

[0098] In this embodiment, "parallel" can be understood as approximately parallel, allowing for non-absolute parallelism due to factors such as assembly tolerances, design tolerances, and structural flatness. A small angular range of error, such as within 15°, is permissible and can be considered as a parallel relationship. "Perpendicular" can be understood as approximately perpendicular, allowing for non-absolute perpendicularity due to factors such as assembly tolerances, design tolerances, and structural flatness. A small angular range of error, such as within 15°, is permissible and can be considered as a perpendicular relationship. The cylindrical shape can be circular, square, or other polygonal.

[0099] It is understood that the structure illustrated in the embodiments of this application does not constitute a specific limitation on the electric tightening tool 100. In other embodiments of this application, the electric tightening tool 100 may include more or fewer components than illustrated, or combine some components, or disassemble some components, or have different component arrangements.

[0100] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0101] The above are the implementation methods of the embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of this application, and these improvements and modifications are also considered to be within the protection scope of this application.

Claims

1. An electric tightening tool, characterized in that, The electric tightening tool includes: A housing, on which a light groove is provided; A lamp panel fixing component includes a fixing part and a light-transmitting part that are connected to each other. The fixing part is disposed in the housing and connected to the housing. The light-transmitting part is embedded in the lamp groove and at least partially exposed in the lamp groove. The fixing part includes a first fixing post. A lamp panel is disposed inside the housing. The lamp panel includes a rigid circuit board and a light-emitting element. The rigid circuit board is connected to the side of the first fixing post away from the housing. The light-emitting element is mounted on the surface of the rigid circuit board facing the light-transmitting part and has a gap with the light-transmitting part. The light-emitting side of the light-emitting element faces the light-transmitting part so that the light emitted by the light-emitting element is emitted to the outside of the housing through the light-transmitting part.

2. The electric tightening tool according to claim 1, characterized in that, The electric tightening tool also includes a light-shielding enclosure, one end of which is connected to the rigid circuit board and surrounds the light-emitting element, and the other end of which is connected to the fixing part. The projection of the light-emitting element on the light-transmitting part is located inside the light-transmitting part, and the projection of the light-shielding enclosure on the light-transmitting part surrounds the projection of the light-emitting element on the light-transmitting part.

3. The electric tightening tool according to claim 2, characterized in that, The number of light-emitting elements in the lamp panel is at least two, and the number of light-shielding walls is at least two. Each light-shielding wall corresponds to a light-emitting element. One end of each light-shielding wall is connected to the rigid circuit board and surrounds the corresponding light-emitting element. The other end of the light-shielding wall is connected to the fixing part.

4. The electric tightening tool according to claim 1, characterized in that, The housing is cylindrical and has at least two lamp slots. The two lamp slots are symmetrically arranged about the central axis of the housing. There are at least two lamp board fixing members and at least two lamp boards. Each lamp board fixing member corresponds to one lamp slot and one lamp board. The light-transmitting part of each lamp board fixing member is embedded in the corresponding lamp slot and at least partially exposed in the lamp slot. The rigid circuit board of each lamp board is connected to the corresponding first fixing post. The light-emitting side of the light-emitting element of each lamp board faces the corresponding light-transmitting part.

5. The electric tightening tool according to claim 4, characterized in that, The lamp groove extends circumferentially along the housing, and the lamp groove includes a first end and a second end along the circumferential direction. The angle between the radial line of the housing passing through the first end of the lamp groove and the radial line passing through the second end of the lamp groove is 90°~150°.

6. The electric tightening tool according to claim 1, characterized in that, The fixing part further includes a second fixing post. The housing is cylindrical and includes a third fixing post connected to the second fixing post. The arrangement direction of the second fixing post and the third fixing post is parallel to the central axis of the housing.

7. The electric tightening tool according to claim 1, characterized in that, The housing is cylindrical, and the electric tightening tool further includes a first fastener, which passes through the rigid circuit board and the first fixing post in a direction perpendicular to the central axis of the housing and locks the rigid circuit board and the first fixing post.

8. The electric tightening tool according to claim 6, characterized in that, The electric tightening tool further includes a second fastener, which passes through the second fixing post and the third fixing post along the extension direction of the central axis of the housing, and locks the second fixing post and the third fixing post.

9. The electric tightening tool according to any one of claims 1-8, characterized in that, The housing is cylindrical, the lamp groove extends radially through the side wall of the housing, the light-transmitting part is flush with the outer surface of the housing, and the surface of the rigid circuit board is parallel to the central axis of the housing.

10. The electric tightening tool according to any one of claims 1-8, characterized in that, The electric tightening tool also includes a main circuit board, at least a portion of which is located within the housing and is parallel to the rigid circuit board.

11. The electric tightening tool according to any one of claims 1-8, characterized in that, The electric tightening tool further includes an end cap connected to the housing, the end cap including a clamping part disposed within the housing, and a portion of the fixing part being clamped between the housing and the clamping part.

12. The electric tightening tool according to claim 11, characterized in that, The end cap further includes a first protrusion, which is disposed inside the housing and surrounds the clamping portion, and the end face of the first protrusion abuts against the end face of the fixing portion.

13. The electric tightening tool according to any one of claims 1-8, characterized in that, The electric tightening tool further includes at least one light-diffusing film, which is disposed on the first surface and / or the second surface of the light-transmitting portion, so that the light emitted by the light-emitting element is diffused by the light-diffusing film and emitted to the outside of the housing, wherein the first surface is opposite to the second surface and the first surface faces the light-emitting element.

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