Dental implant screw groove type detection equipment

Abstract

The utility model discloses an implant tooth screw groove type detection device, which belongs to the implant tooth screw detection field, and is characterized in that the top of a pedestal is fixedly provided with a distance adjusting member, the distance adjusting member is provided with an upper adjusting end and a lower adjusting end, and each adjusting end is fixedly provided with a first angle adjusting member; a second angle adjusting part is fixed to the adjusting end of the upper first angle adjusting part, a clamping part is fixed to the adjusting end of the second angle adjusting part, a mounting frame is fixed to the non-adjusting end of the second angle adjusting part, a third angle adjusting part is fixed to the mounting frame, and a light source is fixed to the adjusting end of the third angle adjusting part. A fourth angle adjusting part is fixed to the adjusting end of the first angle adjusting part located on the lower portion, and a visual inspection camera is fixed to the adjusting end of the fourth angle adjusting part. According to the utility model, through the arrangement of various adjusting parts, adjustment testing is carried out after leaving a factory, the best forming effect can be obtained, and the good detection precision is further obtained.

Description

Technical Field

[0001] This utility model belongs to the field of dental implant screw testing, and in particular relates to a dental implant screw groove testing device. Background Technology

[0002] Inspection of dental implant screws is a crucial step in ensuring the success of dental implant surgery and the long-term stability of the implant. Strict inspection methods and precautions ensure that the screw tightness, dimensional accuracy, and surface quality meet specified standards, thereby protecting the patient's oral health and the lifespan of the implant.

[0003] Most existing methods for detecting the slot shape of dental implant screws involve using a camera to inspect the slot shape of the implant screw. However, the positional relationship between the visual inspection camera, the light source, and the implant screw plays a crucial role in the imaging effect. Current methods determine the positional relationship between the three by determining the installation position. However, due to machining errors, even if the installation position is preset during manufacturing, errors will still exist after assembly, making it difficult to obtain the best imaging effect. Summary of the Invention

[0004] The purpose of this invention is to provide a dental implant screw slot type detection device to overcome at least one of the above-mentioned defects in the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The dental implant screw slot type detection device provided by this utility model includes a base, a distance adjustment component, a first angle adjustment component, a second angle adjustment component, a mounting frame, a third angle adjustment component, a clamping component, a fourth angle adjustment component, a visual inspection camera, and a light source. The distance adjustment component is fixed to the top of the base. The distance adjustment component has two adjustment ends distributed vertically. Each adjustment end is fixed with a first angle adjustment component. The adjustment end of the upper first angle adjustment component is fixed with a second angle adjustment component. The adjustment end of the second angle adjustment component is fixed with a clamping component. The non-adjustment end of the second angle adjustment component is fixed with a mounting frame. The mounting frame is fixed with a third angle adjustment component. The adjustment end of the third angle adjustment component is fixed with a light source. The adjustment end of the lower first angle adjustment component is fixed with a fourth angle adjustment component. The adjustment end of the fourth angle adjustment component is fixed with a visual inspection camera. The clamping component is located above the light source, and the light source is located above the visual inspection camera.

[0007] Preferably, the distance adjustment component includes a guide rail, a slider, a rack, a gear, a handwheel, and a locking device. The guide rail is slidably connected to two sliders distributed vertically. The guide rail has a rack in the middle. The handwheel is inserted into the slider and a gear is fixed thereon. The gear meshes with the rack. The locking device is screwed to the slider and is used to lock and fix the slider.

[0008] Preferably, the locking device includes a first bolt and a push plate. The guide rail has a dovetail tenon, and the slider has a dovetail groove. The dovetail tenon and the dovetail groove slide together. The outer end of the first bolt is fixed with the push plate. The bottom of one side of the slider has a first groove. The first groove is located outside the dovetail groove. The slider outside the first groove has a first threaded hole. The inner end of the first bolt passes through the first threaded hole and abuts against the inner wall of the first groove.

[0009] Preferably, the first angle adjustment component is an arc-shaped slide.

[0010] Preferably, the second angle adjusting member includes a first mounting plate, a second mounting plate, and a second bolt. The first mounting plate is fixed to the adjusting end of the first angle adjusting member located above, and the mounting bracket is fixed to the lower part of the first mounting plate. The first mounting plate has second threaded holes on both the left and right sides, and the second mounting plate has first arc-shaped holes on both the left and right sides. The second bolt passes through the first arc-shaped hole and is inserted into the second threaded hole.

[0011] Preferably, the third angle adjustment component includes an L-shaped seat, a spring, a first mounting seat, and a moving steel ball positioning screw. The L-shaped seat is fixed to the mounting bracket, and the first mounting seat is hinged to the top of the L-shaped seat. The light source is fixed to the first mounting seat. Several springs are fixed to the first mounting seat and the L-shaped seat. Both ends of the L-shaped seat have third threaded holes. The bottom of the first mounting seat has a second groove. The top end of the moving steel ball positioning screw passes through the third threaded hole and abuts against the second groove.

[0012] Preferably, the clamping component includes a thumb cylinder and a clamping claw. The thumb cylinder is fixed to the adjusting end of the second angle adjusting component. The clamping end of the thumb cylinder is detachably fixed with a clamping claw, and the inner sidewall of the clamping claw has a clamping groove.

[0013] Preferably, the fourth angle adjusting member includes a third mounting plate, a second mounting base, and a third bolt. The third mounting plate is fixed to the adjusting end of the first angle adjusting member located below. The third mounting plate has fourth threaded holes on both the left and right sides. The second mounting base has second arc-shaped holes on both the left and right sides. The third bolt passes through the second arc-shaped holes and is inserted into the fourth threaded holes.

[0014] Preferably, the fourth angle adjustment component further includes a fixing seat and a fourth bolt. The front side of the second mounting seat has a first fixing groove and two threaded grooves, which are located on the left and right sides of the first fixing groove, respectively. The rear side of the fixing seat has a second fixing groove. The fixing seats on the left and right sides of the second fixing groove have first through holes. The rear end of the fourth bolt passes through the first through hole and is inserted into the threaded groove. The first fixing groove and the second fixing groove together form a mounting groove for fixing the visual inspection camera.

[0015] Preferably, the light source includes a glass plate, an annular lamp holder, and a third mounting base. The third mounting base is fixed to the first mounting base. The annular lamp holder is fixed to the top of the third mounting base, and the glass plate is fixed to the top of the annular lamp holder. Both the first and third mounting bases have a second through hole in the middle, and the visual inspection camera is located below the second through hole.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. By setting various adjustment components and conducting adjustment tests after leaving the factory, the best molding effect can be obtained, thereby achieving good detection accuracy and solving the error problem caused by traditional structural machining.

[0018] 2. The distance between the adjustable clamp and the vision inspection camera can be adjusted through simple operation.

[0019] 3. The forward and backward tilt angle can be adjusted by the arc-shaped slide, making operation simple and convenient.

[0020] 4. The left and right tilt angles of the clamping parts can be adjusted simply by turning the second bolt.

[0021] 5. By simply turning the directional ball positioning screw and using the spring, the tilt angle of the light source can be adjusted in various directions.

[0022] 6. The clamping groove ensures stable clamping of the dental implant screws.

[0023] 7. The left and right tilt angle of the visual inspection camera can be adjusted simply by turning the third bolt.

[0024] 8. The ring-shaped lamp holder forms a ring-shaped light output, providing uniform and sufficient illumination, enabling the visual inspection camera to clearly capture images of the implant screws. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the right-side structure of this utility model.

[0027] Figure 3 This is a partial front view structural schematic diagram of this utility model.

[0028] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0029] Figure 5 This is a three-dimensional structural diagram of the first mounting plate of this utility model.

[0030] Figure 6 This is a three-dimensional structural diagram of the clamping component of this utility model.

[0031] Figure 7 This is a three-dimensional structural diagram of the light source and the third angle adjustment component of this utility model (excluding the spring).

[0032] Figure 8 This is a three-dimensional structural diagram of the fourth angle adjusting component of this utility model (excluding the third and fourth bolts).

[0033] The labels in the attached diagram are as follows: 1-Base, 2-Distance adjustment component, 3-First angle adjustment component, 4-Second angle adjustment component, 5-Light source, 6-Third angle adjustment component, 7-Clamping component, 8-Fourth angle adjustment component, 9-Vision inspection camera, 10-Mounting bracket, 21-Guide rail, 22-Slider, 23-Rack, 24-Gear, 25-Handwheel, 26-Locking device, 261-First bolt, 262-Push plate, 211-Dovetail tenon, 221-Dovetail groove, 27-First groove, 28-First threaded hole, 41-First mounting plate, 42-Second mounting plate, 43-Second bolt, 44-Second thread Hole, 45-First arc-shaped hole, 61-L-shaped seat, 62-Spring, 63-First mounting seat, 64-Moving steel ball positioning screw, 65-Third threaded hole, 66-Second groove, 71-Thumb cylinder, 72-Clamping claw, 73-Clamping groove, 81-Third mounting plate, 82-Second mounting seat, 83-Third bolt, 84-Fourth threaded hole, 85-Second arc-shaped hole, 86-Fixing seat, 87-Fourth bolt, 88-First fixing groove, 89-Threaded groove, 810-Second fixing groove, 811-First through hole, 51-Glass plate, 52-Ring-shaped lamp holder, 53-Third mounting seat, 11-Second through hole. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0035] Contents not described in detail in this specification are existing technologies known to those skilled in the art. In the description of this utility model, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not 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 limiting this utility model. Furthermore, terms such as "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] like Figures 1 to 8 As shown, the implant screw slot type detection device provided in this embodiment includes a base 1, a distance adjustment component 2, a first angle adjustment component 3, a second angle adjustment component 4, a mounting frame 10, a third angle adjustment component 6, a clamping component 7, a fourth angle adjustment component 8, a visual inspection camera 9, and a light source 5. The distance adjustment component is fixed to the top of the base 1. The distance adjustment component has two adjustment ends distributed vertically. Each adjustment end is fixed with a first angle adjustment component 3. The adjustment end of the upper first angle adjustment component 3 is fixed with a second angle adjustment component 4. The adjustment end of the second angle adjustment component 4 is fixed with a clamping component 7. The non-adjustment end of the second angle adjustment component 4 is fixed with a mounting frame 10. The mounting frame 10 is fixed with a third angle adjustment component 6. The adjustment end of the third angle adjustment component 6 is fixed with a light source 5. The adjustment end of the lower first angle adjustment component 3 is fixed with a fourth angle adjustment component 8. The adjustment end of the fourth angle adjustment component 8 is fixed with a visual inspection camera 9. The clamping component 7 is located above the light source 5, and the light source 5 is located above the visual inspection camera 9.

[0037] Adjust the distance between the clamping member 7 and the visual inspection camera 9 using the two adjusting ends of the distance adjusting member 2. Adjust the front-to-back tilt angle of the clamping member 7 and the light source 5 together using the first angle adjusting member 3 located above. Adjust the front-to-back tilt angle of the visual inspection camera 9 using the first angle adjusting member located below. Adjust the left-to-right tilt angle of the clamping member 7 using the second angle adjusting member 4. Adjust the tilt angle of the light source 5 in various directions using the third angle adjusting member 6. Adjust the left-to-right tilt angle of the visual inspection camera using the fourth angle adjusting member 8. Continuously debug and test during the angle adjustment process until the best imaging effect is obtained, and then keep the clamping member 7, the light source 5, and the visual inspection camera 9 in their current positions. Through the above adjustments, the final clamped implant screw is made coaxial with the light source 5 and the visual inspection camera 9, the end face of the implant screw's groove is parallel to the top face of the light source 5 and the top face of the visual inspection camera 9, and the axis of the implant screw is perpendicular to the top face of the light source 5 and the top face of the visual inspection camera 9. In this way, by setting various adjustment components and conducting adjustment tests after leaving the factory, the best molding effect can be obtained, thereby achieving good testing accuracy and solving the error problem caused by traditional structural machining.

[0038] The distance adjustment component 2 includes a guide rail 21, a slider 22, a rack 23, a gear 24, a handwheel 25, and a locking device 26. The guide rail 21 slidably connects two vertically distributed sliders 22. A rack 23 is located in the middle of the guide rail 21. The handwheel 25 is inserted into the slider 22 and a gear 24 is fixed therein. The gear 24 meshes with the rack 23. The locking device 26 is screwed onto the slider 22 to lock it in place. When adjusting the distance between the clamping component 7 and the vision inspection camera 9, the locking device 26 is unlocked, and then the handwheel 25 is rotated, causing the gear 24 to rotate. Under the action of the rack 23, the slider 22 moves. When the desired position is reached, the handwheel 25 is stopped, and the locking device 26 locks the slider 22 in the current position. Thus, the distance between the clamping component 7 and the vision inspection camera 9 can be adjusted through simple operation.

[0039] The locking device 26 includes a first bolt 261 and a push plate 262. The guide rail 21 has a dovetail tenon 211, and the slider 22 has a dovetail groove 221. The dovetail tenon 211 and the dovetail groove 221 are slidably engaged. The push plate 262 is fixed to the outer end of the first bolt 261. The bottom of one side of the slider 22 has a first groove 27, which is located outside the dovetail groove 221. The slider 22 outside the first groove 27 has a first threaded hole 28. The inner end of the first bolt 261 passes through the first threaded hole 28 and abuts against the inner wall of the first groove 27. When locking is required, the first bolt 261 is tightened, which compresses the inner wall of the first groove 27, causing the dovetail groove 221 to press tightly against the dovetail tenon 211, preventing the dovetail groove 221 from sliding relative to the dovetail tenon 211. When unlocking is required, the first bolt 261 is loosened, the first bolt 261 moves away from the inner wall of the first groove 27, and the dovetail groove 221 is freed from the compression of the first bolt 261, so that the dovetail groove 221 and the dovetail tenon 211 can slide relative to each other.

[0040] The first angle adjustment component 3 is an arc-shaped slide. The forward and backward tilt angle can be adjusted by the arc-shaped slide, which is simple and convenient to operate.

[0041] The second angle adjusting component 4 includes a first mounting plate 41, a second mounting plate 42, and a second bolt 43. The first mounting plate 41 is fixed to the adjusting end of the upper first angle adjusting component 3, and the mounting bracket 10 is fixed to the lower part of the first mounting plate 41. The first mounting plate 41 has second threaded holes 44 on both its left and right sides, and the second mounting plate 42 has first arc-shaped holes 45 on both its left and right sides. The second bolt 43 passes through the first arc-shaped holes 45 and is inserted into the second threaded holes 44. When it is necessary to adjust the left and right tilt angle of the clamping component 7, the second bolt 43 is loosened, and then the second mounting plate 42 is swung left and right. After adjustment, the second bolt 43 is tightened to fix the second mounting plate 42 to the first mounting plate 41, completing the adjustment. The left and right tilt angle of the clamping component 7 can be adjusted simply by turning the second bolt 43.

[0042] The third angle adjustment component 6 includes an L-shaped seat 61, springs 62, a first mounting base 63, and a moving steel ball positioning screw 64. The L-shaped seat 61 is fixed to the mounting bracket 10. The first mounting base 63 is hinged to the top of the L-shaped seat 61. The light source 5 is fixed to the first mounting base 63. Several springs 62 are fixed to the first mounting base 63 and the L-shaped seat 61. Both ends of the L-shaped seat 61 have third threaded holes 65. The bottom of the first mounting base 63 has a second groove 66. The top end of the moving steel ball positioning screw 64 passes through the third threaded hole 65 and abuts against the second groove 66. A triangle is formed between the hinge point and the two abutting points. When the tilt angle of the light source 5 needs to be adjusted, the moving ball positioning screw 64 is turned so that it moves closer to or further away from the L-shaped seat 61. When the moving ball positioning screw 64 moves closer to the L-shaped seat 61, it pushes the side of the L-shaped seat 61 that contacts it to tilt upward, and the spring 62 on the same side extends. When the moving ball positioning screw 64 moves away from the L-shaped seat 61, the spring 62 on the same side contracts, causing the side of the L-shaped seat 61 that contacts it to tilt downward. In this way, by simply turning the moving ball positioning screw 64 in combination with the spring 62, the tilt angle of the light source 5 can be adjusted in various directions.

[0043] The clamping component 7 includes a thumb cylinder 71 and clamping claws 72. The thumb cylinder 71 is fixed to the adjusting end of the second angle adjusting component 4. The clamping end of the thumb cylinder 71 is detachably fixed with the clamping claws 72, and the inner sidewall of the clamping claws 72 has clamping grooves 73. By actuating the thumb cylinder 71, the clamping claws 72 move closer or further apart to clamp and place the implant screws. The clamping grooves 73 ensure stable clamping of the implant screws.

[0044] The fourth angle adjustment component 8 includes a third mounting plate 81, a second mounting base 82, and a third bolt 83. The third mounting plate 81 is fixed to the adjustment end of the first angle adjustment component 3 located below. The third mounting plate 81 has fourth threaded holes 84 on both its left and right sides. The second mounting base 82 has second arc-shaped holes 85 on both its left and right sides. The third bolt 83 passes through the second arc-shaped holes 85 and is inserted into the fourth threaded holes 84. When adjusting the left and right tilt angle of the visual inspection camera 9, loosen the third bolt 83, then swing the second mounting base 82 left and right. After adjustment, tighten the third bolt 83 to fix the second mounting base 82 to the third mounting plate 81, completing the adjustment. The left and right tilt angle adjustment of the visual inspection camera 9 can be completed simply by turning the third bolt 83.

[0045] The fourth angle adjusting component 8 also includes a fixing seat 86 and a fourth bolt 87. The front side of the second mounting seat 82 has a first fixing groove 88 and two threaded grooves 89, which are located on the left and right sides of the first fixing groove 88, respectively. The rear side of the fixing seat 86 has a second fixing groove 810. The fixing seats 86 on the left and right sides of the second fixing groove 810 have first through holes 811. The rear end of the fourth bolt 87 passes through the first through hole 811 and is inserted into the threaded groove 89. The first fixing groove 88 and the second fixing groove 810 together form a mounting groove for fixing the visual inspection camera 9. Through the cooperation of the fourth bolt 87, the fixing seat 86 and the second mounting seat 82, the visual inspection camera 9 is fixedly installed on the fourth angle adjusting component 8.

[0046] The light source 5 includes a glass plate 51, a ring-shaped lamp holder 52, and a third mounting base 53. The third mounting base 53 is fixed to the first mounting base 63. The ring-shaped lamp holder is fixed to the top of the third mounting base 53, and the glass plate 51 is fixed to the top of the ring-shaped lamp holder. Both the first mounting base 63 and the third mounting base 53 have a second through hole 11 in the middle. The visual inspection camera 9 is located below the second through hole 11. The ring-shaped lamp holder forms a circumferential light output, providing uniform and sufficient illumination, enabling the visual inspection camera 9 to clearly capture the image of the dental implant screw.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dental implant screw slot type detection device, characterized in that: It includes a base, a distance adjustment component, a first angle adjustment component, a second angle adjustment component, a mounting bracket, a third angle adjustment component, a clamping component, a fourth angle adjustment component, a vision inspection camera, and a light source; The base is fixed with a distance adjustment component at its top. The distance adjustment component has two adjustment ends distributed vertically, and each adjustment end is fixed with a first angle adjustment component. The first angle adjusting member located above has a second angle adjusting member fixed to its adjusting end, a clamping member fixed to its adjusting end, a mounting bracket fixed to its non-adjusting end, a third angle adjusting member fixed to its mounting bracket, and a light source fixed to its adjusting end. The first angle adjustment member located below has a fourth angle adjustment member fixed to its adjustment end, and the fourth angle adjustment member has a visual inspection camera fixed to its adjustment end. The clamping member is located above the light source, which is located above the visual inspection camera.

2. The implant screw slot type detection device according to claim 1, characterized in that: The distance adjustment component includes a guide rail, a slider, a rack, a gear, a handwheel, and a locking device; The guide rail is slidably connected to two sliders distributed vertically. The guide rail has a rack in the middle; The handwheel is inserted into the slider and a gear is fixed thereon, and the gear meshes with the rack; The locking device is screwed onto the slider and is used to lock and fix the slider.

3. The implant screw slot type detection device according to claim 2, characterized in that: The locking device includes a first bolt and a push plate; The guide rail has a dovetail tenon, the slider has a dovetail groove, and the dovetail tenon and the dovetail groove slide together. A push plate is fixed to the outer end of the first bolt; The bottom of one side of the slider has a first groove, which is located outside the dovetail groove; The slider outside the first groove has a first threaded hole; The inner end of the first bolt passes through the first threaded hole and abuts against the inner sidewall of the first groove.

4. The implant screw slot type detection device according to claim 1, characterized in that: The first angle adjustment component is an arc-shaped slide.

5. The implant screw slot type detection device according to claim 1, characterized in that: The second angle adjustment component includes a first mounting plate, a second mounting plate, and a second bolt; The first mounting plate is fixed to the adjusting end of the first angle adjusting member located above, and the mounting bracket is fixed to the lower part of the first mounting plate; The first mounting plate has second threaded holes on both its left and right sides; The second mounting plate has first arc-shaped holes on both its left and right sides; The second bolt passes through the first arc-shaped hole and is inserted into the second threaded hole.

6. The implant screw slot type detection device according to claim 1, characterized in that: The third angle adjustment component includes an L-shaped seat, a spring, a first mounting seat, and a moving steel ball positioning screw; The L-shaped seat is fixed to the mounting bracket; The top of the L-shaped base is hinged to a first mounting base, and the light source is fixed to the first mounting base; The first mounting base and the L-shaped base are fixed with several springs; Both ends of the L-shaped seat have third threaded holes; The bottom of the first mounting base has a second groove; The top end of the moving steel ball positioning screw passes through the third threaded hole and abuts against the second groove.

7. The implant screw slot type detection device according to claim 1, characterized in that: The clamping component includes a thumb cylinder and a clamping claw; The thumb cylinder is fixed to the adjusting end of the second angle adjusting component; The gripping end of the thumb cylinder is detachably fixed with a gripping claw; The inner wall of the gripper has a gripping groove.

8. The implant screw slot type detection device according to claim 1, characterized in that: The fourth angle adjustment component includes a third mounting plate, a second mounting base, and a third bolt; The third mounting plate is fixed to the adjustment end of the first angle adjustment member located below; The third mounting plate has fourth threaded holes on both its left and right sides; The second mounting base has a second arc-shaped hole on both its left and right sides; The third bolt passes through the second arc-shaped hole and is inserted into the fourth threaded hole.

9. The implant screw slot type detection device according to claim 8, characterized in that: The fourth angle adjusting component also includes a fixing seat and a fourth bolt; The front side of the second mounting base has a first fixing groove and two threaded grooves, with the two threaded grooves located on the left and right sides of the first fixing groove, respectively. The rear side of the fixing seat has a second fixing groove, and the fixing seat on the left and right sides of the second fixing groove has a first through hole; The rear end of the fourth bolt passes through the first through hole and is inserted into the threaded groove; The first fixing groove and the second fixing groove together form a mounting groove for fixing the visual inspection camera.

10. The implant screw slot type detection device according to claim 6, characterized in that: The light source includes a glass plate, a ring-shaped lamp holder, and a third mounting base; The third mounting base is fixed to the first mounting base; A ring-shaped lamp holder is fixed to the top of the third mounting base; A glass plate is fixed to the top of the ring-shaped lamp holder; Both the first and third mounting bases have a second through hole in the middle, and the visual inspection camera is located below the second through hole.

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