Double-station positioning carrier for detecting multi-surface and multi-position MICs on flat cable through one-time focusing

Abstract

The utility model discloses a double-station positioning carrier for detecting a multi-surface multi-position MIC on a flat cable through one-time focusing, which belongs to the technical field of test carriers and comprises a mounting plate, and a bearing assembly is mounted at the front end of the mounting plate; the pressing plate limiting assembly is used for positioning the flat cable; the pressing plate limiting assembly comprises a pressing plate assembly and a limiting assembly, the pressing plate assembly is connected with the limiting assembly, the flat cable and the bearing assembly are both connected with the pressing plate assembly, and the limiting assembly is connected with the bearing assembly. Through the above mode, focusing is only needed for one time, and two flat cables can be placed at one time for detection during detection, so that the efficiency is greatly improved, and MICs distributed at two positions on the front and back surfaces can be detected on one carrier.

Description

Technical Field

[0001] The utility model relates to the technical field of test carriers, in particular to a double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line. Background Art

[0002] Before assembling the cable, the Bluetooth headset charging box needs to test the MIC (module electromagnetic compatibility) on the cable. There are three MICs on a cable, distributed on the front and back sides of the cable, and because of its small size, it needs to be tested under a microscope.

[0003] Chinese patent CN218331788U discloses a novel MIC test fixture, including a base plate, a rotating block is rotatably connected to the center of the rear side of the base plate, the base plate is rotatably connected to a cover plate through the rotating block, a focusing knob is rotatably connected to the center of the top of the cover plate, a speaker groove is opened on one side of the top of the cover plate, and a welding wire external connection groove is opened on the other side of the top of the cover plate.

[0004] However, this patent can only detect one workpiece at a time, which is inefficient.

[0005] Based on this, the utility model designs a double-station positioning carrier for multi-faceted and multi-position MICs on a focus detection line to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] Double-station positioning carrier for multi-faceted and multi-position MICs on a single focus detection line, including mounting plate;

[0009] A bearing assembly is installed at the front end of the mounting plate;

[0010] It also includes a pressure plate limit assembly for positioning the cable;

[0011] The pressure plate limiting assembly includes a pressure plate assembly and a limiting assembly, the pressure plate assembly is connected to the limiting assembly, the wiring arrangement and the bearing assembly are both connected to the pressure plate assembly, and the limiting assembly is connected to the bearing assembly.

[0012] Furthermore, the supporting component includes a base plate, a placement groove, a first fixed-point boss, a second fixed-point boss, a first positioning groove, a second positioning groove, a third positioning groove, a fourth positioning groove, a position line and a focusing center. A placement groove is opened at the front end of the base plate, and two groups of first fixed-point bosses and second fixed-point bosses symmetrically arranged up and down are fixedly connected to the inner walls of the upper and lower ends of the placement groove, respectively. A fourth positioning groove and a second positioning groove are opened on the left side of the inner wall of the upper end of the placement groove, and the second positioning groove is located on the right side of the fourth positioning groove. The first positioning groove and the third positioning groove are opened on the left and right sides of the inner wall of the lower end of the placement groove, respectively, and the fourth positioning groove and the first positioning groove are located on the same horizontal line, position lines are set on the left and right sides of the inner wall at the rear end of the placement groove, and a focusing center is set in the middle of the inner wall at the rear end of the placement groove.

[0013] Furthermore, the bottom plate is fixedly connected to the front end of the mounting plate.

[0014] Furthermore, the pressure plate assembly includes a carrier plate, an installation groove, a profiling groove, a magnet, a pressure claw, a pressure plate, a first avoidance hole, a second avoidance hole and a limit block. A mounting groove is provided at the front end of the carrier plate, and the right end of the mounting groove is blocked. Profiling grooves for placing wiring are provided on the upper and lower sides of the rear end of the mounting groove. The inner wall of the rear end of the profiling groove is provided with a first avoidance hole at the first detection point, the second detection point, the third detection point and the fourth detection point. Two limit blocks are fixedly connected to the inner wall on the right side of the rear end of the mounting groove, a magnet is fixedly connected to the circular hole at the left end of the pressure plate, the right end of the pressure plate is embedded in the gap between the two limit blocks and is clamped with the limit block, the left end of the pressure plate is magnetically connected to the inner wall of the mounting groove through a magnet, six pressure claws are fixedly connected to the front end of the pressure plate, and second avoidance holes for avoiding the fifth detection point and the sixth detection point are provided on the pressure blocks of the two pressure claws on the left side.

[0015] Furthermore, the carrier plate is connected to the limiting assembly.

[0016] Furthermore, the first avoidance hole and the second avoidance hole are both circular.

[0017] Furthermore, the limit assembly includes a first fixed groove, a second fixed groove, a third fixed groove, a fourth fixed groove and a fifth fixed groove, and the lower end of the carrier plate is provided with a first fixed groove, a second fixed groove, a first fixed groove and a second fixed groove from left to right to cooperate with the second fixed boss, and the upper end of the carrier plate is provided with a third fixed groove, a fourth fixed groove, a fifth fixed groove, a third fixed groove, a fourth fixed groove and a fifth fixed groove from left to right to cooperate with the first fixed boss.

[0018] Furthermore, the first fixed-point slot, the second fixed-point slot, the third fixed-point slot, the fourth fixed-point slot and the fifth fixed-point slot are all isosceles trapezoidal slots.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] When the utility model is used, the cable is placed in the pressure plate assembly and the pressure plate assembly is used to press the cable to limit the position of the cable. After placing it, the pressure plate assembly is placed on the bearing assembly and the pressure plate assembly is moved according to the position to be detected. The pressure plate assembly is positioned by the bearing assembly and the limiting assembly. Because the MIC is distributed on the front and back sides of the cable, after checking one side, the pressure plate assembly needs to be taken out, turned over and put back on the bearing assembly, and then the remaining position is detected. The MIC on the front and back sides of the cable can be detected, and the applicability is high.

[0021] No matter how many products need to be inspected, the utility model does not need to move the microscope back and forth frequently to focus, but only needs to focus once. Moreover, during inspection, two cables can be placed for inspection at one time, which greatly improves the efficiency. On one carrier, it is possible to inspect MICs distributed at positions on both the front and back sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The utility model is a three-dimensional dual-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line. Figure 1 ;

[0024] Figure 2 The utility model is a three-dimensional double-station positioning carrier pressure plate limit assembly for multi-faceted and multi-position MIC on a single focus detection line Figure 1 ;

[0025] Figure 3 The utility model is a three-dimensional double-station positioning carrier pressure plate limit assembly for multi-faceted and multi-position MIC on a single focus detection line Figure 2 ;

[0026] Figure 4 It is a three-dimensional diagram of a dual-station positioning carrier mounting plate and a bearing assembly of a multi-faceted and multi-position MIC on a single focus detection cable of the utility model;

[0027] Figure 5 It is a schematic diagram of the second detection point detected by the double-station positioning carrier of the multi-faceted and multi-position MIC on the one-time focus detection line of the utility model;

[0028] Figure 6 It is a schematic diagram of the first detection point detected by the double-station positioning carrier of the multi-faceted and multi-position MIC on the one-time focus detection line of the utility model;

[0029] Figure 7 It is a schematic diagram of the fourth detection point detected by the double-station positioning carrier of the multi-faceted and multi-position MIC on the one-time focus detection line of the utility model;

[0030] Figure 8 It is a schematic diagram of the third detection point detected by the double-station positioning carrier of the multi-faceted and multi-position MIC on the one-time focus detection line of the utility model;

[0031] Fig. 9 It is a schematic diagram of the sixth detection point detected by the double-station positioning carrier of the multi-faceted and multi-position MIC on the one-time focus detection line of the utility model;

[0032] Fig.10 It is a schematic diagram of the fifth detection point detected by the double-station positioning carrier of the multi-surface and multi-position MIC on the one-time focus detection line of the utility model.

[0033] The numbers in the figure represent:

[0034] 1. Mounting plate; 2. Carrying assembly; 21. Bottom plate; 22. Placement slot; 23. First fixed point boss; 24. Second fixed point boss; 25. First positioning slot; 26. Second positioning slot; 27. Third positioning slot; 28. Fourth positioning slot; 29. ​​Position line; 210. Focus center; 3. Press plate limit assembly; 31. Press plate assembly; 311. Carrier plate; 312. Mounting slot; 313. Profile slot; 314. Magnet; 315. Press claw; 316, pressure plate; 317, first avoidance hole; 318, second avoidance hole; 319, limit block; 32, limit assembly; 321, first fixed-point slot; 322, second fixed-point slot; 323, third fixed-point slot; 324, fourth fixed-point slot; 325, fifth fixed-point slot; 4, wiring; 41, first detection point; 42, second detection point; 43, third detection point; 44, fourth detection point; 45, fifth detection point; 46, sixth detection point. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the following description, the terms “left”, “right”, “front”, “back”, “up” and “down” are used to refer to Fig.10 The viewing direction is oriented.

[0037] Embodiment 1

[0038] In some embodiments, please refer to the attached instructions. Figure 1-10 , a double-station positioning carrier for multi-faceted and multi-position MICs on a single focus detection line, including a mounting plate 1;

[0039] A bearing assembly 2 is installed at the front end of the mounting plate 1;

[0040] It also includes a pressure plate limiting assembly 3 for positioning the cable 4;

[0041] The pressure plate limiting assembly 3 includes a pressure plate assembly 31 and a limiting assembly 32 . The pressure plate assembly 31 is connected to the limiting assembly 32 . During detection, the cable 4 and the bearing assembly 2 are both connected to the pressure plate assembly 31 , and the limiting assembly 32 is connected to the bearing assembly 2 .

[0042] When in use, place the cable 4 in the pressure plate assembly 31 and press the cable 4 by the pressure plate assembly 31 to limit the position of the cable 4. After placing it, place the pressure plate assembly 31 on the carrier assembly 2 and move the pressure plate assembly 31 according to the position that needs to be detected. Position the pressure plate assembly 31 through the carrier assembly 2 and the limiting assembly 32. Because the MIC is distributed on the front and back sides of the cable 4, after checking one side, the pressure plate assembly 31 needs to be taken out, turned over and put back on the carrier assembly 2, and then the remaining position is detected. The MIC on the front and back sides of the cable 4 can be detected, and it is highly applicable.

[0043] The bearing assembly 2 includes a bottom plate 21, a placement groove 22, a first fixed-point boss 23, a second fixed-point boss 24, a first positioning groove 25, a second positioning groove 26, a third positioning groove 27, a fourth positioning groove 28, a position line 29 and a focusing center 210. A placement groove 22 is provided at the front end of the bottom plate 21. Two groups of first and second fixed-point bosses 23 and 24 symmetrically arranged up and down are fixedly connected to the inner walls of the upper and lower ends of the placement groove 22, respectively. A fourth positioning groove 28 and a second positioning groove 26 are provided on the left side of the inner wall of the upper end of the placement groove 22. The second positioning groove 26 is located on the right side of the fourth positioning groove 28. The first positioning groove 25 and the third positioning groove 27 are provided on the left and right sides of the inner wall of the lower end of the placement groove 22, respectively. The fourth positioning groove 28 and the first positioning groove 25 are located on the same horizontal line. Position lines 29 are provided on the left and right sides of the inner wall at the rear end of the placement groove 22. A focusing center 210 is provided in the middle of the inner wall at the rear end of the placement groove 22.

[0044] The bottom plate 21 is fixedly connected to the front end of the mounting plate 1 .

[0045] The pressure plate assembly 31 includes a carrier plate 311, a mounting groove 312, a profiling groove 313, a magnet 314, a pressure claw 315, a pressure plate 316, a first avoidance hole 317, a second avoidance hole 318 and a limit block 319. The front end of the carrier plate 311 is provided with a mounting groove 312, the right end of the mounting groove 312 is blocked, and the upper and lower sides of the rear end of the mounting groove 312 are provided with profiling grooves 313 for placing the cable 4. The inner wall of the rear end of the profiling groove 313 is provided with a first avoidance hole 317 at the first detection point 41, the second detection point 42, the third detection point 43 and the fourth detection point 44. The hole 317 is formed, and two limit blocks 319 are fixedly connected to the inner wall on the right side of the rear end of the mounting groove 312. A magnet 314 is fixedly connected to the circular hole on the left end of the pressure plate 316. The right end of the pressure plate 316 is embedded in the gap between the two limit blocks 319 and is clamped with the limit block 319. The left end of the pressure plate 316 is magnetically connected to the inner wall of the mounting groove 312 through the magnet 314. Six pressing claws 315 are fixedly connected to the front end of the pressure plate 316. The pressure blocks of the two pressing claws 315 on the left are provided with a second avoidance hole 318 for avoiding the fifth detection point 45 and the sixth detection point 46.

[0046] The carrier plate 311 is connected to the limiting assembly 32 .

[0047] During detection, the pressing claw 315 and the contoured groove 313 are both in contact with and connected to the flat cable 4 , and the carrier plate 311 is in contact with and connected to the placement groove 22 .

[0048] Preferably, the first avoidance hole 317 and the second avoidance hole 318 are both circular.

[0049] The limiting assembly 32 includes a first fixed point slot 321, a second fixed point slot 322, a third fixed point slot 323, a fourth fixed point slot 324 and a fifth fixed point slot 325. The lower end of the carrier plate 311 is provided with a first fixed point slot 321, a second fixed point slot 322, a first fixed point slot 321 and a second fixed point slot 322 from left to right to match the second fixed point boss 24. The upper end of the carrier plate 311 is provided with a third fixed point slot 323, a fourth fixed point slot 324, a fifth fixed point slot 325, a third fixed point slot 323, a fourth fixed point slot 324 and a fifth fixed point slot 325 from left to right to match the first fixed point boss 23.

[0050] Preferably, the first fixed-point slot 321 , the second fixed-point slot 322 , the third fixed-point slot 323 , the fourth fixed-point slot 324 and the fifth fixed-point slot 325 are all isosceles trapezoidal slots.

[0051] During detection, the first fixed point slot 321 and the second fixed point slot 322 are both plugged into the second fixed point boss 24 , and the third fixed point slot 323 , the fourth fixed point slot 324 and the fifth fixed point slot 325 are all plugged into the first fixed point boss 23 .

[0052] When installing the cable 4, first take out the pressing plate 316 from the installation groove 312, and then put the two cables 4 to be tested into the profiling groove 313 respectively. After placing them, put one end of the pressing plate 316 between the limit blocks 319, and limit the pressing plate 316 by the limit blocks 319. The other end of the pressing plate 316 is sucked on the inner wall of the installation groove 312 through the magnet 314, and the pressing claw 315 presses the cable 4, and the second avoidance hole 318 avoids the fifth detection point 45 and the sixth detection point 46, and the first avoidance hole 317 avoids the first detection point 41, the second detection point 42, the third detection point 43 and the fourth detection point 44, and then adjust the focus of the microscope to make it coincide with the focus center 210, and then place the carrier 311 in the placement groove 22, just move or The carrier 311 is flipped and moved to different positions, and the first fixed point boss 23, the second fixed point boss 24, the first positioning groove 25, the second positioning groove 26, the third positioning groove 27, the fourth positioning groove 28 and the position line 29 are used for positioning, so that the first detection point 41, the second detection point 42, the third detection point 43, the fourth detection point 44, the fifth detection point 45 and the sixth detection point 46 can be aligned with the focus of the microscope to achieve MIC detection on the cable 4. No matter how many products need to be detected, there is no need to move the microscope back and forth frequently for focusing, only one focusing is required, and during the detection, two cables 4 can be placed for detection at one time, which greatly improves the efficiency. On one carrier, MIC detection distributed at 6 positions on both sides can be achieved;

[0053] When inspecting the first inspection point 41, flip the carrier 311 so that the rear end of the carrier 311 faces forward, and then put the carrier 311 into the placement groove 22, move the carrier 311 so that the right end of the carrier 311 abuts against the right side wall of the placement groove 22, and the lower end of the carrier 311 abuts against the second fixed point boss 24. At this time, the first inspection point 41 is aligned with the focus of the microscope, and the positioning is completed;

[0054] When inspecting the second inspection point 42, the carrier 311 is turned over so that the rear end of the carrier 311 faces forward, and then the carrier 311 is placed in the placement groove 22, and the carrier 311 is moved so that the right end of the carrier 311 abuts against the right side wall of the placement groove 22, and the upper end of the carrier 311 abuts against the upper side wall of the placement groove 22, and the first fixed point boss 23 is inserted into the fifth fixed point groove 325. At this time, the second inspection point 42 is aligned with the focus of the microscope, and the positioning is completed;

[0055] When inspecting the third inspection point 43, the carrier plate 311 is turned over so that the rear end of the carrier plate 311 faces forward, and then the carrier plate 311 is placed in the placement groove 22, and the carrier plate 311 is moved so that the left end of the carrier plate 311 abuts against the left side wall of the first positioning groove 25, and the lower end of the carrier plate 311 abuts against the lower side wall of the placement groove 22, and the second fixed point boss 24 is inserted into the first fixed point groove 321. At this time, the third inspection point 43 is aligned with the focus of the microscope, and the positioning is completed;

[0056] When testing the fourth testing point 44, the carrier 311 is turned over so that the rear end of the carrier 311 faces forward, and then the carrier 311 is placed in the placement groove 22, and the carrier 311 is moved so that the left end of the carrier 311 abuts against the left side wall of the fourth positioning groove 28, and the upper end of the carrier 311 abuts against the upper side wall of the placement groove 22, and the first fixed point boss 23 is inserted into the third fixed point groove 323. At this time, the fourth testing point 44 is aligned with the focus of the microscope, and the positioning is completed;

[0057] When testing the fifth testing point 45, the carrier 311 is placed in the placement groove 22, and the carrier 311 is moved so that the left end of the carrier 311 abuts against the right side wall of the third positioning groove 27, and the left and right ends of the carrier 311 are aligned with the position line 29, the lower end of the carrier 311 abuts against the lower side wall of the placement groove 22, and the second fixed point boss 24 is inserted into the second fixed point groove 322. At this time, the fifth testing point 45 is aligned with the focus of the microscope, and the positioning is completed;

[0058] When detecting the sixth detection point 46, the carrier 311 is placed in the placement groove 22, and the carrier 311 is moved so that the left end of the carrier 311 is against the left side wall of the second positioning groove 26, and the left and right ends of the carrier 311 are aligned with the position line 29, and the first fixed point boss 23 is inserted into the fourth fixed point groove 324. At this time, the fourth detection point 44 is aligned with the focus of the microscope to complete the positioning.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-station positioning carrier for multi-faceted and multi-position MICs on a single focus detection line, comprising a mounting plate (1), characterized in that: A bearing assembly (2) is installed at the front end of the mounting plate (1); It also includes a pressure plate limiting assembly (3) for positioning the cable (4); The pressure plate limiting assembly (3) comprises a pressure plate assembly (31) and a limiting assembly (32), the pressure plate assembly (31) is connected to the limiting assembly (32), the cable (4) and the bearing assembly (2) are both connected to the pressure plate assembly (31), and the limiting assembly (32) is connected to the bearing assembly (2); The bearing assembly (2) comprises a bottom plate (21), a placement groove (22), a first fixed point boss (23), a second fixed point boss (24), a first positioning groove (25), a second positioning groove (26), a third positioning groove (27), a fourth positioning groove (28), a position line (29) and a focus center (210). The bottom plate (21) is provided with a placement groove (22) at the front end. The inner walls of the upper and lower ends of the placement groove (22) are respectively fixedly connected with two groups of first fixed point bosses (23) and second fixed point bosses (24) symmetrically arranged in the upper and lower directions. A fourth positioning groove (28) and a second positioning groove (26) are provided on the left side of the inner wall at the upper end of the groove (22), and the second positioning groove (26) is located on the right side of the fourth positioning groove (28). A first positioning groove (25) and a third positioning groove (27) are provided on the left and right sides of the inner wall at the lower end of the placement groove (22), respectively. The fourth positioning groove (28) and the first positioning groove (25) are located on the same horizontal line. Position lines (29) are provided on the left and right sides of the inner wall at the rear end of the placement groove (22), and a focus center (210) is provided in the middle of the inner wall at the rear end of the placement groove (22).

2. The double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line according to claim 1, characterized in that: The bottom plate (21) is fixedly connected to the front end of the mounting plate (1).

3. The double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line according to claim 2, characterized in that: The pressure plate assembly (31) comprises a carrier plate (311), a mounting groove (312), a contour groove (313), a magnet (314), a pressure claw (315), a pressure plate (316), a first avoidance hole (317), a second avoidance hole (318) and a limit block (319). The front end of the carrier plate (311) is provided with a mounting groove (312), the right end of the mounting groove (312) is blocked, and contour grooves (313) for placing the cable (4) are provided on the upper and lower sides of the rear end of the mounting groove (312), and the inner wall of the rear end of the contour groove (313) is provided at the first detection point (41), the second detection point (42), the third detection point (43) and the fourth detection point (44). A first avoidance hole (317) is provided, two limit blocks (319) are fixedly connected to the inner wall on the right side of the rear end of the installation groove (312), a magnet (314) is fixedly connected to the circular hole on the left end of the pressure plate (316), the right end of the pressure plate (316) is embedded in the gap between the two limit blocks (319) and is clamped with the limit block (319), the left end of the pressure plate (316) is magnetically connected to the inner wall of the installation groove (312) through the magnet (314), six pressing claws (315) are fixedly connected to the front end of the pressure plate (316), and second avoidance holes (318) for avoiding the fifth detection point (45) and the sixth detection point (46) are opened on the pressure blocks of the two pressing claws (315) on the left side.

4. The double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line according to claim 3, characterized in that: The carrier plate (311) is connected to the limiting assembly (32).

5. The double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line according to claim 4, characterized in that: The first avoidance hole (317) and the second avoidance hole (318) are both circular.

6. The double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line according to claim 5, characterized in that: The limiting assembly (32) comprises a first fixed point slot (321), a second fixed point slot (322), a third fixed point slot (323), a fourth fixed point slot (324) and a fifth fixed point slot (325); the lower end of the carrier plate (311) is provided with, from left to right, a first fixed point slot (321), a second fixed point slot (322), a first fixed point slot (321) and a second fixed point slot (322) which match the second fixed point boss (24); the upper end of the carrier plate (311) is provided with, from left to right, a third fixed point slot (323), a fourth fixed point slot (324), a fifth fixed point slot (325), a third fixed point slot (323), a fourth fixed point slot (324) and a fifth fixed point slot (325) which match the first fixed point boss (23).

7. The double-station positioning carrier for multi-faceted and multi-position MICs on a one-time focus detection line according to claim 6, characterized in that: The first fixed-point slot (321), the second fixed-point slot (322), the third fixed-point slot (323), the fourth fixed-point slot (324) and the fifth fixed-point slot (325) are all isosceles trapezoidal slots.

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