An intelligent fabric inspection machine tunnel light source

Abstract

The present invention relates to the technical field of clothing fabric production equipment, and discloses an intelligent cloth inspection machine tunnel light source, including a tunnel housing and a D65 light source. First light passing holes and second light passing holes are respectively formed in the bottom inner wall and the top inner wall of the tunnel housing. There are two D65 light sources. In this device, the light sources are vertically irradiated onto the third reflecting surface and the third reflecting surface through the two D65 lamps. After being reflected by the third reflecting surface and the fourth reflecting surface, the light sources are irradiated onto the cloth through the first light passing holes. In addition to passing through the camera field of view, the second light passing holes can also pass through the light of the supplementary light source. The light of the supplementary light source is irradiated onto the first reflecting surface and the second reflecting surface at an angle of 45° and is irradiated onto the cloth through the first light passing holes at an angle of 45° after being reflected, so that the lighting angle of the color detection tunnel light source for the cloth meets the textile detection requirements, and thus there is no deviation between the color collected by the camera and the actual color.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing fabric production equipment, and particularly to a tunnel light source for an intelligent cloth inspection machine. Background Art

[0002] A cloth inspection machine is an essential special equipment for detecting cotton, wool, linen, silk, chemical fiber and other extra-large width, double-width and single-width fabrics before production in the clothing industry. The operation method of the cloth inspection machine: provide a hardware environment for cloth inspection, continuously unfold the fabric in segments, provide sufficient light source, and the operator observes by eyesight to find fabric defects and color differences. The cloth inspection machine automatically completes the length recording and winding and finishing work. A cloth inspection machine with good performance is equipped with an electronic defect detection device, which is statistically analyzed by a computer to assist the cloth inspection operation and print out. Tunnel light sources are commonly used in the field of machine vision to provide light sources for targets, enabling cameras to capture clearer images, and usually cooperate with line scan cameras to achieve on-line detection of targets.

[0003] In an intelligent cloth inspection machine, a tunnel light source is used to irradiate the fabric, and a line array camera is used to collect images. However, tunnel light sources mostly use LED light strips, and the light sources provided are only suitable for fabric defect detection. For fabric color detection, the lighting angles of the tunnel light sources do not meet the requirements of textile detection, resulting in a deviation between the colors captured by the camera and the actual colors, and there are certain deficiencies. Summary of the Invention

[0004] The present invention provides the following technical solution: A tunnel light source for an intelligent cloth inspection machine, including a tunnel housing and a D65 light source. First light passing holes and second light passing holes are respectively opened on the bottom inner wall and the top inner wall of the tunnel housing. There are two D65 light sources. The bottoms of the two D65 light sources are respectively fixedly connected to the tops of a first reflecting surface and a second reflecting surface, and the two D65 light sources are respectively distributed below a third reflecting surface and a fourth reflecting surface. Heat dissipation components are arranged at the bottom of the tunnel housing and below the two D65 light sources.

[0005] By adopting the above technical solution; the light sources are vertically irradiated onto the third reflecting surface and the third reflecting surface through two D65 lamps. After being reflected by the third reflecting surface and the fourth reflecting surface, the light sources are transmitted through the first light passing hole and irradiated onto the fabric. In addition to transmitting through the camera's field of view, the second light passing hole can also transmit the light of the supplementary light source. The light of the supplementary light source is irradiated onto the first reflecting surface and the second reflecting surface at an angle of 45° and then reflected and irradiated onto the fabric through the first light passing hole at an angle of 45°. The angle between the light source and the observation direction is required to be 45° for easy observation. The heat dissipation components dissipate heat from the D65 light source, avoiding the D65 light source from accumulating too much heat due to long-term operation, and further avoiding damage to the D65 light source and resulting in the suspension of the cloth inspection work.

[0006] Preferably, supplementary light sources for 45° lighting are provided on both sides of the top of the tunnel housing. There are two supplementary light sources, both of which use D65 lamps and are mirror-symmetrical about the center point of the tunnel housing.

[0007] By adopting the above technical solution; when cooperating with the external wiring line-scan camera for acquisition, it is generally carried out in a closed space to prevent interference from external environmental light sources, and thus supplement the light of the tunnel light source.

[0008] Preferably, the heat dissipation component includes a heat conduction plate, heat conduction holes, a blower, a mounting plate and second mounting holes. The top of the heat conduction plate is fixedly connected to the bottom of the tunnel housing. The heat conduction holes are arranged in a rectangular array on the front surface of the heat conduction plate. The blower is fixedly connected to one side of the mounting plate close to it. The side of the mounting plate away from the blower is fixedly connected to the back surface of the heat conduction plate through the second mounting holes.

[0009] By adopting the above technical solution; the heat conduction plate quickly conducts away the heat generated by the D65 light source and transmitted into the tunnel housing, avoiding the accumulation of more heat at the connection between the D65 light source and the tunnel housing, and generating wind by the blower and transmitting the wind into the heat conduction holes of the heat conduction plate, so as to quickly diffuse the heat in the heat conduction plate, and thus while avoiding the accumulation of more heat at the connection between the D65 light source and the tunnel housing, ensuring the rapid diffusion of the heat of the heat conduction plate and guaranteeing the heat dissipation effect of the D65 light source.

[0010] Preferably, the second mounting holes are arranged in a rectangular array on the side of the mounting plate close to the blower, and the second mounting holes are respectively close to the end corners of the mounting plate.

[0011] By adopting the above technical solution; the mounting plate is conveniently installed through the second mounting holes, and thus the blower is conveniently installed.

[0012] Preferably, the outer side wall of the heat conduction plate is designed in a concave-convex shape, and the heat conduction plate is made of silicon carbide heat conduction material.

[0013] By adopting the above technical solution; the concave-convex design of the outer side wall of the heat conduction plate is convenient for the outer side wall of the heat conduction plate to contact with the outside, improving the efficiency of heat diffusion, and the silicon carbide heat conduction material has good heat conduction performance.

[0014] Preferably, the inner wall diameter of the first light passing hole is larger than the inner wall diameter of the second light passing hole, and the cross-sections of the first light passing hole and the second light passing hole are both designed in a rectangular shape.

[0015] By adopting the above technical solution; the light sources emitted by the external 45° supplementary light source and the D65 light source can irradiate the cloth at 45° through the first light passing hole and the second light passing hole. The line-scan camera field of view of the external intelligent cloth inspection machine can pass through the second light passing hole and collect the cloth image through the first light passing hole.

[0016] Preferably, two of the D65 light sources are two D65 lamps, and the two D65 lamps are mirror-symmetrical about the center point of the tunnel housing.

[0017] By adopting the above technical solution, the light source is vertically irradiated onto the third reflecting surface and the third reflecting surface through two D65 lamps, and after being reflected by the third reflecting surface and the fourth reflecting surface, the light source is irradiated onto the cloth through the first light passing hole.

[0018] Preferably, the first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface of the inner wall of the tunnel are all total reflecting surfaces, and the remaining surfaces of the inner wall of the tunnel are all neutral gray surfaces.

[0019] By adopting the above technical solution, the first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface which are total reflecting surfaces can reflect the light of the D65 light source inside the tunnel light source and the external D65 supplementary light source and pass through the first light passing hole and the second light passing hole at an angle of 45° to irradiate onto the cloth. In the figure, the angles between the first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface and the horizontal plane are all 22.5°. At the same time, it is ensured that the light emitted by the external 45° supplementary light source and the D65 light source can pass through the first light passing hole and the second light passing hole at an angle of 45° to irradiate onto the cloth.

[0020] Preferably, the top and both sides of the tunnel housing are provided with first mounting holes arranged in a rectangular array.

[0021] By adopting the above technical solution, it is convenient to install the tunnel housing through the first mounting holes, which is convenient for actual operation.

[0022] Beneficial effects

[0023] Compared with the prior art, the present invention provides an intelligent cloth inspection machine tunnel light source, which has the following beneficial effects:

[0024] 1. The device vertically irradiates the light source onto the third reflecting surface and the third reflecting surface through two D65 lamps. After being reflected by the third reflecting surface and the fourth reflecting surface, the light source is irradiated onto the cloth through the first light passing hole. In addition to passing through the camera field of view, the second light passing hole can also pass through the light of the supplementary light source. The light of the supplementary light source is irradiated onto the first reflecting surface and the second reflecting surface at an angle of 45° and is reflected and then passes through the first light passing hole at an angle of 45° to irradiate onto the cloth, so that the lighting angle of the tunnel light source for color detection of the cloth meets the requirements of textile detection, and thus the color collected by the camera has no deviation from the actual color.

[0025] 2. The device dissipates heat from the D65 light source through the heat dissipation component, avoiding the accumulation of too much heat in the D65 light source due to long time, and further avoiding the damage of the D65 light source caused thereby, resulting in the stop of the cloth inspection work, and ensuring the cloth inspection efficiency. Description of the drawings

[0026] Figure 1 Geometric condition diagram for color detection of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0027] Figure 2 Schematic optical path diagram of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0028] Figure 3 Schematic cross-sectional structure diagram of the tunnel housing of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0029] Figure 4 Schematic cross-sectional structure diagram of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0030] Figure 5 Top view structure diagram of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0031] Figure 6 Bottom view structure diagram of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0032] Figure 7 Schematic cross-sectional structure diagram of the heat dissipation component and the tunnel body of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0033] Figure 8 Exploded structure diagram of the heat dissipation component of the tunnel light source of an intelligent cloth inspection machine according to the present invention;

[0034] Figure 9 Tunnel light source of an intelligent cloth inspection machine according to the present invention Figure 8 Enlarged structure diagram of A in

[0035] In the figure: 1. Light source incident direction; 2. Observation direction; 3. Cloth; 4. First mounting hole; 5. Second light passing hole; 6. Third reflecting surface; 7. D65 light source; 8. First reflecting surface; 9. First light passing hole; 10. Second reflecting surface; 11. Fourth reflecting surface; 12. Supplementary light source; 13. Tunnel housing; 14. Heat dissipation component; 1401. Heat conducting plate; 1402. Heat conducting hole; 1403. Mounting plate; 1404. Blower; 1405. Second mounting hole. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1;

[0038] Please refer to Figures 1-6 , an intelligent cloth inspection machine tunnel light source, including a tunnel housing 13 and a D65 light source 7, characterized in that: a first light passing hole 9 and a second light passing hole 5 are respectively opened on the bottom inner wall and the top inner wall of the tunnel housing 13; there are two D65 light sources 7, the bottoms of the two D65 light sources 7 are respectively fixedly connected to the tops of a first reflecting surface 8 and a second reflecting surface 10, and the two D65 light sources 7 are respectively distributed on the lower sides of a third reflecting surface 6 and a fourth reflecting surface 11; heat dissipation components 14 are arranged at the bottom of the tunnel housing 13 and below the two D65 light sources 7; the light source is vertically irradiated onto the third reflecting surface 6 and the third reflecting surface 6 through the two D65 lamps, and after being reflected by the third reflecting surface 6 and the fourth reflecting surface 11, the light source is irradiated onto the cloth 3 through the first light passing hole 9; in addition to passing through the camera field of view, the second light passing hole 5 can also pass through the light of the supplementary light source 12, the light of the supplementary light source 12 is irradiated onto the first reflecting surface 8 and the second reflecting surface 10 at 45°, and after being reflected, it is irradiated onto the cloth 3 through the first light passing hole 9 at 45°; the included angle between the light source incident direction 1 and the observation direction 2 is required to be 45° for easy observation.

[0039] Furthermore, rectangular array queued first mounting holes 4 are opened on the top and both sides of the tunnel housing 13 for easy use.

[0040] Embodiment Two;

[0041] Please refer to Figure 1 , 3 And 6, supplementary light sources 12 for 45° lighting are arranged on both sides of the top of the tunnel housing 13. There are two supplementary light sources 12, both of the two supplementary light sources 12 adopt D65 lamps and are mirror-symmetrical about the center point of the tunnel housing 13. When cooperating with the external wiring scanning camera for acquisition, it is generally carried out in a closed space to prevent interference from external environmental light sources, and then supplementary lighting is carried out on the light of the tunnel light source. The two D65 light sources 7 adopt two D65 lamps, the two D65 lamps are mirror-symmetrical about the center point of the tunnel housing 13, and the D65 light source 7 is connected and fixed to the tunnel body through a mounting bracket. The D65 lamp is fixed and limited through the fixed bracket so that the light emitted by the D65 lamp can only be emitted upward to the third total reflection surface and the fourth total reflection surface.

[0042] Embodiment Three;

[0043] Please refer to Figures 1-6, the first reflecting surface 8, the second reflecting surface 10, the third reflecting surface 6, and the fourth reflecting surface 11 on the inner wall of the tunnel are all total reflecting surfaces, and the remaining surfaces of the inner wall of the tunnel are all neutral gray surfaces. The inner wall diameter of the first light passing hole 9 is greater than the inner wall diameter of the second light passing hole 5. The cross-sections of the first light passing hole 9 and the second light passing hole 5 are both rectangularly designed. The first reflecting surface 8, the second reflecting surface 10, the third reflecting surface 6, and the fourth reflecting surface 11, which are total reflecting surfaces, can reflect the light of the D65 light source 7 inside the tunnel light source and the external D65 supplementary light source 12 and pass through the first light passing hole 9 and the second light passing hole 5 at an angle of 45° to irradiate the fabric 3. In the figure, the angles between the first reflecting surface 8, the second reflecting surface 10, the third reflecting surface 6, and the fourth reflecting surface 11 and the horizontal plane are all 22.5°. At the same time, it is ensured that the light emitted by the external 45° supplementary light source 12 and the D65 light source 7 can pass through the first light passing hole 9 and the second light passing hole 5 at an angle of 45° to irradiate the fabric 3.

[0044] Furthermore, except for the first reflecting surface 8, the second reflecting surface 10, the third reflecting surface 6, and the fourth reflecting surface 11, which are total reflecting surfaces, the remaining surfaces of the inner wall of the tunnel body are sprayed with neutral gray, facilitating the line scan camera of the externally connected intelligent fabric inspection machine to pass through the second light passing hole 5 and collect the image of the fabric 3 through the first light passing hole 9.

[0045] Embodiment Four;

[0046] Please refer to Figures 7-9 , the heat dissipation component 14 includes a heat conducting plate 1401, heat conducting holes 1402, a blower 1404, a mounting plate 1403, and a second mounting hole 1405. The top of the heat conducting plate 1401 is fixedly connected to the bottom of the tunnel housing 13. The heat conducting holes 1402 are arranged in a rectangular array on the front surface of the heat conducting plate 1401. The blower 1404 is fixedly connected to one side of the mounting plate 1403 close to it. The side of the mounting plate 1403 away from the blower 1404 is fixedly connected to the back surface of the heat conducting plate 1401 through the second mounting hole 1405. The heat conducting plate 1401 quickly conducts away the heat generated by the D65 light source 7 and transmitted into the tunnel housing 13, preventing excessive heat accumulation at the connection between the D65 light source 7 and the tunnel housing 13. The blower 1404 generates wind and transmits the wind into the heat conducting holes 1402 of the heat conducting plate 1401, thereby quickly diffusing the heat in the heat conducting plate 1401. Furthermore, while preventing excessive heat accumulation at the connection between the D65 light source 7 and the tunnel housing 13, it ensures the quick diffusion of the heat of the heat conducting plate 1401 and guarantees the heat dissipation effect of the D65 light source 7.

[0047] Furthermore, the second mounting holes 1405 are arranged in a rectangular array on the side of the mounting plate 1403 close to the blower 1404, and the second mounting holes 1405 are respectively close to the end corners of the mounting plate 1403. It is convenient to install the mounting plate 1403 through the second mounting holes 1405, so as to facilitate the installation of the blower 1404. A through groove for the blower 1404 to exhaust air is provided on the side of the mounting plate 1403 close to the blower 1404, ensuring that the air generated by the blower 1404 enters the heat conduction holes 1402. The outer side wall of the heat conduction plate 1401 is designed in a concave-convex shape, which is convenient for the outer side wall of the heat conduction plate 1401 to contact the outside, improving the efficiency of heat diffusion. The heat conduction plate 1401 is made of silicon carbide heat conduction material and has good heat conduction performance.

[0048] Working principle: When in use, the device is powered on by connecting to an external power source. The light source is vertically irradiated onto the third reflecting surface 6 and the third reflecting surface 6 through two D65 lamps. After being reflected by the third reflecting surface 6 and the fourth reflecting surface 11, the light source passes through the first light passing hole 9 and irradiates onto the cloth 3. In addition to passing through the camera field of view, the second light passing hole 5 can also pass through the light of the supplementary light source 12. The light of the supplementary light source 12 is irradiated onto the first reflecting surface 8 and the second reflecting surface 10 at an angle of 45° and after being reflected, it passes through the first light passing hole 9 at an angle of 45° and irradiates onto the cloth 3. The included angle between the light source incident direction 1 and the observation direction 2 is required to be 45° for easy observation. Except for the first reflecting surface 8, the second reflecting surface 10, the third reflecting surface 6 and the fourth reflecting surface 11 which are total reflection surfaces, the inner walls of the tunnel body are sprayed with neutral gray, so that the line scan camera field of view of the external intelligent cloth inspection machine can pass through the second light passing hole 5 and collect the image of the cloth 3 through the first light passing hole 9. When the supplementary light source 12 cooperates with the external line scan camera for collection, it is generally carried out in a closed space to prevent interference from external environmental light sources, and then supplement the light of the tunnel light source.

[0049] The D65 light source 7 is dissipated heat through the heat dissipation component 14, avoiding the accumulation of too much heat in the D65 light source 7 due to long time, and then avoiding the damage of the D65 light source 7 caused by this, resulting in the stop of the cloth inspection work. When specifically operating the heat dissipation component 14, the heat conduction plate 1401 quickly conducts away the heat generated by the D65 light source 7 and transmitted into the tunnel housing 13, avoiding the accumulation of too much heat at the connection between the D65 light source 7 and the tunnel housing 13, and generating wind power through the blower 1404 and transmitting the wind power into the heat conduction holes 1402 of the heat conduction plate 1401, thereby quickly diffusing the heat in the heat conduction plate 1401. Furthermore, while avoiding the accumulation of too much heat at the connection between the D65 light source 7 and the tunnel housing 13, it ensures the rapid diffusion of the heat of the heat conduction plate 1401 and guarantees the heat dissipation effect of the D65 light source 7.

[0050] In summary, the device irradiates the light source vertically onto the third reflecting surface 6 and the third reflecting surface 6 through two D65 lamps. After being reflected by the third reflecting surface 6 and the fourth reflecting surface 11, the light source is irradiated onto the cloth 3 through the first light passing hole 9. In addition to passing through the camera's field of view, the second light passing hole 5 can also pass through the light of the supplementary light source 12. The light of the supplementary light source 12 is irradiated onto the first reflecting surface 8 and the second reflecting surface 10 at an angle of 45° and after being reflected, it is irradiated onto the cloth 3 through the first light passing hole 9 at an angle of 45°. Thus, the lighting angle of the tunnel light source for color detection of the cloth 3 meets the requirements of textile detection, so that the color collected by the camera has no deviation from the actual color. The device dissipates heat from the D65 light source 7 through the heat dissipation component 14, avoiding the accumulation of too much heat in the D65 light source 7 due to long-term operation, and further avoiding damage to the D65 light source 7 and the stoppage of the cloth inspection work, ensuring the cloth inspection efficiency.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent cloth inspection machine tunnel light source, comprising a tunnel housing (13) and a D65 light source (7), Characterized in that: The bottom inner wall and the top inner wall of the tunnel housing (13) are respectively provided with a first light passing hole (9) and a second light passing hole (5). There are two D65 light sources (7). The bottoms of the two D65 light sources (7) are respectively fixedly connected to the tops of a first reflecting surface (8) and a second reflecting surface (10), and the two D65 light sources (7) are respectively distributed on the lower sides of a third reflecting surface (6) and a fourth reflecting surface (11). Heat dissipation components (14) are arranged at the bottom of the tunnel housing (13) and below the two D65 light sources (7); Supplementary light sources (12) for 45° light projection are arranged on both sides of the top of the tunnel housing (13). There are two supplementary light sources (12). Both of the two supplementary light sources (12) adopt D65 lamps and are mirror-symmetrical with respect to the center point of the tunnel housing (13); The heat dissipation component (14) includes a heat conducting plate (1401), heat conducting holes (1402), a blower (1404), a mounting plate (1403) and second mounting holes (1405). The top of the heat conducting plate (1401) is fixedly connected to the bottom of the tunnel housing (13). The heat conducting holes (1402) are arranged in a rectangular array on the front surface of the heat conducting plate (1401). The blower (1404) is fixedly connected to one side of the mounting plate (1403) close to each other. The side of the mounting plate (1403) away from the blower (1404) is fixedly connected to the back surface of the heat conducting plate (1401) through the second mounting holes (1405); The included angles between the first reflecting surface 8, the second reflecting surface 10, the third reflecting surface 6 and the fourth reflecting surface 11 and the horizontal plane are all 22.5°. The light of the supplementary light source (12) is projected onto the first reflecting surface (8) and the second reflecting surface (10) at 45° and is reflected by the third reflecting surface 6 and the fourth reflecting surface 11 and then passes through the first light passing hole 9 at 45° and irradiates onto the cloth 3. The light of the two D65 light sources (7) is reflected by the third reflecting surface (6) and the fourth reflecting surface (11) and irradiates onto the cloth through the first light passing hole (9).

2. An intelligent cloth inspection machine tunnel light source according to claim 1, Characterized in that: The second mounting holes (1405) are arranged in a rectangular array on the side of the mounting plate (1403) close to the blower (1404), and the second mounting holes (1405) are respectively close to the end corners of the mounting plate (1403).

3. An intelligent cloth inspection machine tunnel light source according to claim 1, Characterized in that: The outer side wall of the heat conducting plate (1401) is designed to be concave-convex, and the heat conducting plate (1401) is made of a silicon carbide heat conducting material.

4. An intelligent cloth inspection machine tunnel light source according to claim 1, Characterized in that: The inner wall diameter of the first light passing hole (9) is larger than the inner wall diameter of the second light passing hole (5). The cross sections of the first light passing hole (9) and the second light passing hole (5) are both designed to be rectangular.

5. An intelligent cloth inspection machine tunnel light source according to claim 1, Characterized in that: The two D65 light sources (7) adopt two D65 lamps, and the two D65 lamps are mirror-symmetrical about the center point of the tunnel housing (13).

6. An intelligent cloth inspection machine tunnel light source according to claim 1, characterized in that: The first reflecting surface (8), the second reflecting surface (10), the third reflecting surface (6) and the fourth reflecting surface (11) of the inner wall of the tunnel are all total reflecting surfaces, and the remaining surfaces of the inner wall of the tunnel are all neutral gray surfaces.

7. An intelligent cloth inspection machine tunnel light source according to claim 1, characterized in that: The top and both sides of the tunnel housing (13) are provided with first mounting holes (4) arranged in a rectangular array queue.

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