A chamfering device for clay models

Abstract

The utility model discloses a chamfering device for oil clay models, including a T-shaped seat, an adjusting slider, a positioning fastener and a scraping wire, wherein the T-shaped seat includes a vertically arranged support block, a horizontally arranged fixed block and a connecting block, wherein the first end of the fixed block is formed on one side of the lower part of the support block, and the first end of the connecting block is formed on the other side of the lower part of the support block, the adjusting slider is slidably mounted on the connecting block, the first end of the scraping wire is connected to the second end of the fixed block, the second end of the scraping wire is connected to the outer end of the adjusting slider, the middle part of the scraping wire abuts against the upper end of the supporting block, and the positioning fastener is arranged between the adjusting slider and the connecting block. The oil clay is cut by the scraping wire, thereby realizing chamfering, the contact area between the scraping wire and the oil clay is small, and the scraping wire is sharper, which can prevent the cut oil clay from accumulating, and the chamfering is more labor-saving and easy to operate; the adjustment slider is moved to realize the adjustment of the chamfering angle, the structure is simple, the cost is low, the volume of the chamfering device is reduced, and the chamfering device is easy to carry.

Description

Technical Field

[0001] The utility model relates to the technical field of clay model shaping tools, in particular to a chamfering device for clay models. Background Art

[0002] Oil clay is mainly used for handicrafts, hardware, plastic molds, and student sculptures. It can be recycled and will not deteriorate for a long time. It is sensitive to temperature and can be softened and shaped at a low temperature. The sculptures of models such as handicrafts are extremely plastic. In the process of making oil clay into oil clay models, it is often necessary to use a chamfering device for chamfering. The traditional chamfering device is a polygonal scraper. Through the angles between each adjacent edge, the edges at different angles are used to scrape off excess oil clay, thereby chamfering. For example, the Chinese utility model patent: CN202020772581.1, a chamfering device for a clay model, characterized in that it includes a chamfering plate, there are no less than two chamfering plates, and they are arranged in parallel, the chamfering plate is a polygon, and the chamfering plate is provided with no less than two connecting holes; connecting rods, the number of connecting rods is consistent with the number of connecting holes, and the connecting rods are fixed on the connecting holes. During the scraping process, excess sludge will accumulate on the chamfer plate and stick to the chamfer plate, and the accumulated sludge will overflow to both sides, which will cause excess sludge to be generated on both sides of the chamfer and require secondary scraping. The chamfering efficiency is low and the effect is poor. In addition, the contact area between the chamfer plate and the sludge is large, resulting in large resistance. Greater force is required for chamfering, and the operation is inconvenient. On the other hand, the polygonal chamfer plate is large in size and not easy to carry, so it is necessary to improve it. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a chamfering device for clay models, which has a simple structure, low cost, small size, is easy to carry, and can achieve stepped or stepless adjustment of the chamfering angle.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a chamferer for clay models, including a T-shaped seat, an adjusting slider, a positioning fastener and a scraper line, the T-shaped seat including a vertically arranged support block, a horizontally arranged fixed block and a connecting block, the first end of the fixed block is formed on one side of the lower part of the support block, and the first end of the connecting block is formed on the other side of the lower part of the support block, the adjusting slider is slidably installed on the connecting block, the first end of the scraper line is connected to the second end of the fixed block, the second end of the scraper line is connected to the outer end of the adjusting slider, the middle part of the scraper line is against the upper end of the support block, and the positioning fastener is arranged between the adjusting slider and the connecting block to fix the adjusting slider.

[0005] In a further technical solution, the adjusting slider includes a sliding plate and a fixed plate. The sliding plate is molded on the upper part of the fixed plate to form an L-shaped adjusting slider. A dovetail groove is provided on the upper part of the connecting block, and a dovetail slider is provided on the lower part of the sliding plate. The dovetail groove is slidably connected to the dovetail slider. The inner side surface of the fixed plate movably presses against the second end of the connecting block, and the second end of the scraper wire is fixedly connected to the outer side surface of the fixed plate.

[0006] In a further technical solution, a handle is fixedly installed at the lower part of the T-shaped seat, and the handle includes a gripping portion and connecting portions formed at both ends of the gripping portion, and the two connecting portions are fixedly installed on the T-shaped seat by screws respectively.

[0007] In a further technical solution, the positioning fastener includes an adjusting screw, the sliding plate is provided with an adjusting threaded hole, the adjusting threaded hole penetrates the sliding plate in a vertical direction, the adjusting screw is threadedly connected in the adjusting threaded hole, the lower end of the adjusting screw is abutted against the connecting block, and the upper end of the adjusting screw is provided with a rotating wheel.

[0008] In a further technical solution, the positioning fastener includes a spring, a positioning ball and a plurality of positioning grooves arranged at intervals. The sliding plate or the connecting block is provided with a positioning sliding hole, the spring is arranged in the positioning sliding hole, the positioning ball is slidably installed in the positioning sliding hole and cooperates with the spring to abut against it, and each positioning groove is arranged at intervals along the lateral direction on the connecting block or the sliding plate, and the positioning ball cooperates with each positioning groove to limit the position.

[0009] In a further technical solution, a positioning slide hole is opened in the connecting block and passes through the connecting block, the positioning slide hole is adjacent to the second end of the connecting block, the connecting part of the handle arranged on the connecting block is located below the positioning slide hole, and each positioning groove is arranged on the lower end surface of the sliding plate, the upper end of the spring is abutted against the positioning ball, and the lower end of the spring is abutted against the connecting part.

[0010] In a further technical solution, a first limiting groove is opened at the upper part of the second end of the fixed block, a second limiting groove is opened at the upper part of the supporting block, and a third limiting groove is opened at the upper part of the fixed plate. The first limiting groove, the second limiting groove and the third limiting groove are aligned in the transverse direction, and the scraping line is respectively embedded in the first limiting groove, the second limiting groove and the third limiting groove.

[0011] In a further technical solution, the length of the fixed block is smaller than the length of the connecting block, the distance between the upper end surface of the supporting block and the upper end surface of the fixed block is equal to the length of the fixed block, the scraping line between the supporting block and the fixed block is the first chamfered section, and the scraping line between the supporting block and the connecting block is the second chamfered section. In the initial state, the inner end of the sliding plate abuts the supporting block, and the inner side surface of the fixed plate abuts the second end of the connecting block. The clamping angles between the fixed block and the supporting block and the first chamfered section are 45°, the clamping angles between the supporting block and the second chamfered section are 60°, and the clamping angles between the connecting block and the second chamfered section are 30°.

[0012] In a further technical solution, the second end of the fixed block and the outer end of the fixed plate are respectively provided with avoidance grooves, and a fastening screw is threadedly connected in each of the two avoidance grooves, and the two ends of the scraping wire are respectively wrapped and fixed on the two fastening screws.

[0013] In a further technical solution, an angle marking scale is provided on one side of the connecting block, and an indication mark is provided on the same side of the sliding plate. In an initial state, the indication mark is located at the inner end of the angle marking scale.

[0014] After adopting the above structure, the advantages of the utility model compared with the prior art are: the two ends of the scraper wire are fixed on the T-shaped seat and the adjusting slider, the scraper wire, the support block and the fixed block form a first triangle, and the scraper wire, the support block and the adjusting slider form a second triangle. The scraper wire cuts the sludge to achieve chamfering. The contact area between the scraper wire and the sludge is small and sharper, which can prevent the cut sludge from accumulating, and is more labor-saving and easy to operate during chamfering; by moving the adjusting slider, the shape of the second triangle is changed to achieve adjustment of the chamfering angle, which has a simple structure and low cost, reduces the volume of the chamferer and is easy to carry; by fixing the adjusting slider with an adjusting screw, the chamfering angle can be adjusted steplessly, the adjustment angle is more free, and the scope of application is wider; by fixing the adjusting slider with a positioning ball and a positioning groove, the chamfering angle can be adjusted in steps, and the adjustment method is simpler and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0017] Figure 2 It is a cross-sectional view of the first embodiment of the utility model;

[0018] Figure 3 It is an exploded view of the first embodiment of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the second embodiment of the utility model;

[0020] Figure 5 It is a cross-sectional view of the second embodiment of the utility model;

[0021] Figure 6 It is an exploded view of the second embodiment of the utility model;

[0022] Figure 7 It is a structural schematic diagram of an adjusting slider in the second embodiment of the utility model;

[0023] Figure 8This is a state diagram after adjustment of the second embodiment of the present utility model.

[0024] In the figure:

[0025] 11 supporting block, 111 second limiting groove, 12 fixing block, 121 first limiting groove, 13 connecting block, 131 dovetail slide groove;

[0026] 2 adjusting slider, 21 sliding plate, 211 adjusting threaded hole, 212 positioning groove, 213 dovetail slider, 214 positioning sliding hole, 22 fixing plate, 221 third limiting groove;

[0027] 31 adjusting screw, 311 rotating wheel, 32 spring, 33 positioning ball;

[0028] 4 scraping line, 41 first chamfering section, 42 second chamfering section;

[0029] 51 avoidance groove, 52 fastening screw;

[0030] 61 angle marking scale, 62 indication marking;

[0031] 7 handle, 71 gripping portion, 72 connecting portion. DETAILED DESCRIPTION

[0032] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0033] Embodiment 1

[0034] A chamfering device for clay models, such as Figures 1 to 3 As shown, it includes a T-shaped seat, an adjusting slider 2, a positioning fastener and a scraper 4. The T-shaped seat includes a vertically arranged support block 11, a horizontally arranged fixed block 12 and a connecting block 13. The first end of the fixed block 12 is formed on one side of the lower part of the support block 11, and the first end of the connecting block 13 is formed on the other side of the lower part of the support block 11. The adjusting slider 2 is slidably installed on the connecting block 13. The first end of the scraper 4 is connected to the second end of the fixed block 12, and the second end of the scraper 4 is connected to the outer end of the adjusting slider 2. The middle part of the scraper 4 is against the upper end of the support block 11. The positioning fastener is arranged between the adjusting slider 2 and the connecting block 13 to fix the adjusting slider 2.

[0035] The traditional chamfering device adopts at least one thin scraper to perform chamfering. In order to adjust the chamfering angle, the scraper is often set to a polygon. The more sides the scraper has, the richer the adjustable chamfering angles are, and the larger the volume is, which is not convenient to carry. In addition, the scraper encounters greater resistance when chamfering, which will produce more sludge accumulation, resulting in a decrease in the chamfering effect, and often requires secondary processing. The two ends of the scraper line 4 of the utility model are fixed on the T-shaped seat and the adjusting slider 2. The scraper line 4 forms a first triangle with the support block 11 and the fixed block 12, and the scraper line 4 forms a second triangle with the support block 11 and the adjusting slider 2. The scraper line 4 cuts the sludge to achieve chamfering. The contact area between the scraper line 4 and the sludge is small and sharper, which can prevent the cut sludge from accumulating, and is more labor-saving and easy to operate when chamfering. The adjusting slider 2 is moved to change the shape of the second triangle to achieve the adjustment of the chamfering angle. The structure is simple, the cost is low, the volume of the chamfering device is reduced, and it is easy to carry.

[0036] Specifically, the adjusting slider 2 includes a sliding plate 21 and a fixed plate 22. The sliding plate 21 is formed on the upper part of the fixed plate 22 to form an L-shaped adjusting slider 2. A dovetail slide groove 131 is provided on the upper part of the connecting block 13. A dovetail slider 213 is provided on the lower part of the sliding plate 21. The dovetail slide groove 131 is slidably connected with the dovetail slider 213. The inner side surface of the fixed plate 22 movably abuts against the second end of the connecting block 13. The second end of the scraper 4 is fixedly connected with the outer side surface of the fixed plate 22. The adjusting slider 2 and the connecting block 13 are slidably connected by the dovetail slider 213 and the dovetail slide groove 131. The structure is simple and the cost is low. Of course, the dovetail slider 213 can also be set on the upper part of the connecting block 13. The dovetail slide groove 131 is set on the lower part of the sliding plate 21. The upper end surface of the sliding plate 21 and the upper end surface of the fixed block 12 are located in the same horizontal plane.

[0037] Specifically, a handle 7 is fixedly installed at the lower part of the T-shaped seat, and the handle 7 includes a gripping portion 71 and connecting portions 72 formed at both ends of the gripping portion 71, and the two connecting portions 72 are fixedly installed on the T-shaped seat by screws. By holding the handle 7 to perform chamfering operation, the operation is more convenient and labor-saving.

[0038] Specifically, the positioning fastener includes an adjusting screw 31, and the sliding plate 21 is provided with an adjusting threaded hole 211, and the adjusting threaded hole 211 penetrates the sliding plate 21 in the vertical direction. The adjusting screw 31 is threadedly connected in the adjusting threaded hole 211, and the lower end of the adjusting screw 31 is abutted against the connecting block 13, and the upper end of the adjusting screw 31 is provided with a rotating wheel 311. By fixing the adjusting slider 2 with the adjusting screw 31, the stepless adjustment of the chamfer angle can be achieved, the adjustment angle is more free, and the application range is wider. When in use, the adjusting screw 31 is loosened and the adjusting slider 2 is slid to the desired position, and then the adjusting screw 31 is tightened so that the lower end of the adjusting screw 31 abuts against the connecting block 13, thereby fixing the adjusting slider 2. Preferably, the connecting block 13 is provided with a plurality of limiting holes at intervals, and the lower end of the adjusting screw 31 is inserted into the corresponding limiting hole, thereby improving the fixing firmness and achieving step-by-step adjustment.

[0039] Specifically, a first limiting groove 121 is provided at the upper portion of the second end of the fixing block 12, a second limiting groove 111 is provided at the upper portion of the supporting block 11, and a third limiting groove 221 is provided at the upper portion of the fixing plate 22. The first limiting groove 121, the second limiting groove 111, and the third limiting groove 221 are aligned in the transverse direction, and the scraping line 4 is respectively embedded in the first limiting groove 121, the second limiting groove 111, and the third limiting groove 221. The scraping line 4 is limited by the first limiting groove 121, the second limiting groove 111, and the third limiting groove 221 to prevent the scraping line 4 from being offset when subjected to force during chamfering, thereby improving the accuracy and stability of chamfering.

[0040] Specifically, the length of the fixed block 12 is smaller than the length of the connecting block 13, the distance between the upper end surface of the support block 11 and the upper end surface of the fixed block 12 is equal to the length of the fixed block 12, the scraping line 4 between the support block 11 and the fixed block 12 is the first chamfered section 41, and the scraping line 4 between the support block 11 and the connecting block 13 is the second chamfered section 42. In the initial state, the inner end of the sliding plate 21 abuts the support block 11, and the inner side surface of the fixed plate 22 abuts the second end of the connecting block 13. The clamping feet between the fixed block 12 and the support block 11 and the first chamfered section 41 are 45°, the clamping feet between the support block 11 and the second chamfered section 42 are 60°, and the clamping feet between the connecting block 13 and the second chamfered section 42 are 30°. In actual use, 30°, 60° and 45° chamfers are commonly used chamfering angles. The fixed block 12, the support block 11 and the first chamfer section 41 form a first triangle, and the first triangle is an isosceles triangle. The clamping feet between the fixed block 12 and the support block 11 and the first chamfer section 41 are 45° respectively. The shape of the first triangle is fixed, so there is no need to adjust, and the chamfering operation can be performed quickly and directly; in the initial state, the clamping foot between the support block 11 and the second chamfer section 42 is 60°, and the clamping foot between the connecting block 13 and the second chamfer section 42 is 30°. When using these two chamfering angles, you only need to quickly move the adjusting slider 2 inward and press against the T-seat to achieve quick adjustment, which is more convenient to use.

[0041] Specifically, the second end of the fixed block 12 and the outer end of the fixed plate 22 are respectively provided with a evacuation groove 51, and a fastening screw 52 is respectively threadedly connected in the two evacuation grooves 51, and the two ends of the scraper wire 4 are respectively wound and fixed to the two fastening screws 52. The fastening screws 52 are hidden by the evacuation grooves 51, so that the second end of the fixed block 12 and the outer end of the fixed plate 22 are flat and have no protrusions, so that it is convenient to achieve verticality and horizontality during chamfering, prevent skewness, and improve the chamfering accuracy. In addition, the scraper wire 4 is fixed by the fastening screws 52, which is convenient for adjusting the chamfering angle and replacing the scraper wire 4, and the maintenance is simple and the cost is low.

[0042] Specifically, an angle marking scale 61 is provided on one side of the connecting block 13, and an indication mark 62 is provided on the same side of the sliding plate 21. In the initial state, the indication mark 62 is located at the inner end of the angle marking scale 61. The scales of the angle marking scale 61 correspond to different chamfering angles, and precise adjustment is achieved by moving the adjustment slider 2 so that the indication mark 62 points to the scale of the corresponding angle marking scale 61.

[0043] Embodiment 2

[0044] This embodiment provides a chamfering device for a clay model, such as Figures 4 to 8As shown, the structure of the chamfering device in this embodiment is basically the same as that in the first embodiment, except that the positioning fastener in this embodiment includes a spring 32, a positioning ball 33 and a plurality of positioning slots 212 arranged at intervals, the sliding plate 21 or the connecting block 13 is provided with a positioning slide hole 214, the spring 32 is arranged in the positioning slide hole 214, the positioning ball 33 is slidably installed in the positioning slide hole 214 and cooperates with the spring 32, each positioning slot 212 is arranged at intervals in the lateral direction on the connecting block 13 or the sliding plate 21, and the positioning ball 33 is limitedly cooperated with each positioning slot 212. By fixing the adjusting slider 2 with the positioning ball 33 and the positioning slot 212, the step-by-step adjustment of the chamfering angle can be achieved. When adjusting, there is no need to unlock, and the adjusting slider 2 is directly pulled with force, so that the spring 32 is compressed, the positioning ball 33 is displaced and disengaged from the positioning slot 212, until the positioning ball 33 enters the next positioning slot 212, thereby fixing the adjusting slider 2 and achieving adjustment, and the adjustment method is simpler and convenient to use.

[0045] Specifically, the positioning slide hole 214 is provided in the connection block 13 and penetrates the connection block 13. The positioning slide hole 214 is adjacent to the second end of the connection block 13. The connection portion 72 of the handle 7 provided on the connection block 13 is located below the positioning slide hole 214. Each positioning groove 212 is provided on the lower end surface of the sliding plate 21. The upper end of the spring 32 is abutted against the positioning ball 33, and the lower end of the spring 32 is abutted against the connection portion 72. The upper end of the positioning slide hole 214 has a smaller diameter than the lower end, forming a T-shaped hole, thereby limiting the positioning ball 33 and preventing the positioning ball 33 from moving out of the positioning slide hole 214. When disassembling, the spring 32 and the positioning ball 33 can be disassembled from the lower end of the positioning slide hole 214 by disassembling the handle 7, which is convenient for disassembly, maintenance and assembly, and has a simple structure and low cost.

[0046] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A chamfering device for a clay model, characterized in that: The invention comprises a T-shaped seat, an adjusting slider (2), a positioning fastener and a scraper wire (4); the T-shaped seat comprises a vertically arranged support block (11), a horizontally arranged fixed block (12) and a connecting block (13); a first end of the fixed block (12) is formed on one side of the lower part of the support block (11); a first end of the connecting block (13) is formed on the other side of the lower part of the support block (11); the adjusting slider (2) is slidably mounted on the connecting block (13); a first end of the scraper wire (4) is connected to a second end of the fixed block (12); a second end of the scraper wire (4) is connected to an outer end of the adjusting slider (2); a middle part of the scraper wire (4) abuts against an upper end of the supporting block (11); and a positioning fastener is arranged between the adjusting slider (2) and the connecting block (13) to fix the adjusting slider (2).

2. A chamfering device for a clay model according to claim 1, characterized in that: The adjusting slider (2) comprises a sliding plate (21) and a fixed plate (22); the sliding plate (21) is formed on the upper part of the fixed plate (22) to form an L-shaped adjusting slider (2); a dovetail sliding groove (131) is provided on the upper part of the connecting block (13); a dovetail sliding block (213) is provided on the lower part of the sliding plate (21); the dovetail sliding groove (131) is slidably connected to the dovetail sliding block (213); the inner side surface of the fixed plate (22) movably abuts against the second end of the connecting block (13); and the second end of the scraper (4) is fixedly connected to the outer side surface of the fixed plate (22).

3. A chamfering device for a clay model according to claim 2, characterized in that: A handle (7) is fixedly mounted on the lower part of the T-shaped seat. The handle (7) comprises a gripping portion (71) and connecting portions (72) formed at both ends of the gripping portion (71). The two connecting portions (72) are fixedly mounted on the T-shaped seat by screws.

4. A chamfering device for a clay model according to claim 3, characterized in that: The positioning fastener comprises an adjusting screw (31), the sliding plate (21) is provided with an adjusting threaded hole (211), the adjusting threaded hole (211) penetrates the sliding plate (21) in a vertical direction, the adjusting screw (31) is threadedly connected in the adjusting threaded hole (211), the lower end of the adjusting screw (31) is abutted against the connecting block (13), and the upper end of the adjusting screw (31) is provided with a rotating wheel (311).

5. The chamfering device for clay models according to claim 3, characterized in that: The positioning fastener comprises a spring (32), a positioning ball (33) and a plurality of positioning grooves (212) arranged at intervals. The sliding plate (21) or the connecting block (13) is provided with a positioning sliding hole (214). The spring (32) is arranged in the positioning sliding hole (214). The positioning ball (33) is slidably installed in the positioning sliding hole (214) and abuts against the spring (32). The positioning grooves (212) are arranged at intervals on the connecting block (13) or the sliding plate (21) along the transverse direction. The positioning balls (33) are limitedly matched with the positioning grooves (212).

6. A chamfering device for a clay model according to claim 5, characterized in that: The positioning slide hole (214) is opened in the connecting block (13) and passes through the connecting block (13); the positioning slide hole (214) is adjacent to the second end of the connecting block (13); the connecting portion (72) of the handle (7) arranged on the connecting block (13) is located below the positioning slide hole (214); each of the positioning grooves (212) is arranged on the lower end surface of the sliding plate (21); the upper end of the spring (32) is abutted against the positioning ball (33); and the lower end of the spring (32) is abutted against the connecting portion (72).

7. A chamfering tool for a clay model according to any one of claims 2 to 6, characterized in that: A first limiting groove (121) is provided at the upper portion of the second end of the fixing block (12), a second limiting groove (111) is provided at the upper portion of the supporting block (11), and a third limiting groove (221) is provided at the upper portion of the fixing plate (22). The first limiting groove (121), the second limiting groove (111) and the third limiting groove (221) are aligned in a transverse direction, and the scraping line (4) is respectively embedded in the first limiting groove (121), the second limiting groove (111) and the third limiting groove (221).

8. A chamfering device for a clay model according to claim 7, characterized in that: The length of the fixed block (12) is smaller than the length of the connecting block (13); the distance between the upper end surface of the supporting block (11) and the upper end surface of the fixed block (12) is equal to the length of the fixed block (12); the scraping line (4) located between the supporting block (11) and the fixed block (12) is a first chamfered section (41); the scraping line (4) located between the supporting block (11) and the connecting block (13) is a second chamfered section (42); in an initial state, the inner end of the sliding plate (21) abuts against the supporting block (11); the inner side surface of the fixed plate (22) abuts against the second end of the connecting block (13); the clamping angle between the fixed block (12) and the supporting block (11) and the first chamfered section (41) is 45 degrees; the clamping angle between the supporting block (11) and the second chamfered section (42) is 60 degrees; and the clamping angle between the connecting block (13) and the second chamfered section (42) is 30 degrees.

9. A chamfering device for a clay model according to claim 8, characterized in that: The second end of the fixing block (12) and the outer end of the fixing plate (22) are respectively provided with a dodging groove (51), and a fastening screw (52) is respectively threadedly connected in the two dodging grooves (51), and the two ends of the scraping wire (4) are respectively wound and fixed on the two fastening screws (52).

10. A chamfering device for a clay model according to claim 9, characterized in that: An angle marking scale (61) is provided on one side of the connection block (13), and an indication mark (62) is provided on the same side of the sliding plate (21). In the initial state, the indication mark (62) is located at the inner end of the angle marking scale (61).

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