JP7159682B2 - Manufacturing method of pointer, pointer and clock - Google Patents

Description

The present invention relates to a method of manufacturing pointers used in measuring instruments such as watches and meters, the pointers, and timepieces having the same.

For example, in pointers used in timepieces, as described in Patent Document 1, a metal needle mounting member called a hook is inserted into the mounting hole of the needle body, and the crimped portion of the needle mounting member is inserted. A structure in which a needle body is attached to a needle mounting member by caulking is known.

JP-A-7-159548

The needle body of this type of pointer has a mounting hole formed in a polygonal shape such as a hexagon. Further, the needle mounting member has a small-diameter crimped portion smaller than the inner diameter of the mounting hole and a large-diameter holding portion larger than the inner diameter of the mounting hole on the outer peripheral surface of the cylindrical portion into which the pointer shaft is inserted. It is structured. As a result, the pointer is attached to the needle body by inserting the crimped portion of the needle mounting member into the mounting hole of the needle body and pressing the periphery of the mounting hole against the presser portion, and then crimping the crimped portion. It is designed to be attached to a member.

With such a pointer, when the crimped portion of the needle mounting member is inserted into the mounting hole of the needle body and the crimped portion is crimped, the outer circumference of the crimped portion bites into each side of the polygonal mounting hole. The parts must be forced outward to secure the needle body to the needle mounting member. Therefore, according to this guideline, it is necessary to increase the crimping force when crimping the crimped portion. However, if the crimping force is increased, the needle body will be deformed, resulting in deterioration of quality.

The problem to be solved by the present invention is to provide a method of manufacturing a pointer that prevents the deformation of the needle body, satisfactorily fixes the needle body to the needle mounting member, and ensures quality, the pointer, and a timepiece equipped with the same. It is to be.

The present invention comprises a first step of forming a groove on the peripheral edge of a mounting hole provided in a needle body and a raised portion on the edge of the groove, and a needle mounting member inserted into the mounting hole of the needle body. The needle main body is fixed to the needle mounting member by inserting the needle main body into the needle mounting member and pinching the peripheral edge portion of the mounting hole with the clamping portion provided in the needle mounting member for clamping the peripheral edge portion of the mounting hole. 2. A method for manufacturing a pointer characterized by comprising:

Further, the present invention includes a needle body provided with a mounting hole, and a needle mounting member provided with a clamping portion for sandwiching the periphery of the mounting hole, and the needle mounting member is clamped by the clamping portion of the needle mounting member. a groove corresponding to the clamping portion is provided on the peripheral edge portion of the mounting hole of the needle body, and a raised portion is provided on the edge of the groove portion . be.

According to the present invention, deformation of the needle body can be prevented and the needle body can be satisfactorily fixed to the needle mounting member, thereby ensuring quality.

1 is an enlarged cross-sectional view of a main part showing a timepiece module in one embodiment in which the present invention is applied to a wristwatch; FIG. FIG. 2 is an enlarged plan view of the pointer shown in FIG. 1 as seen from above; FIG. 3 is an enlarged rear view of the needle body of the pointer shown in FIG. 2 as seen from the bottom side; 3 is an enlarged cross-sectional view showing a main part of the pointer shown in FIG. 2, taken along the line AA. FIG. FIG. 5 is a cross-sectional view showing a further enlarged portion A shown in FIG. 4; 3 is an enlarged half-sectional view showing the needle mounting member before the needle main body of the pointer shown in FIG. 2 is mounted; FIG. FIG. 4 is an enlarged cross-sectional view of a main part showing grooves formed in the needle body shown in FIG. 3 by laser processing; 4 is an enlarged rear view showing a first modified example in which the pointer shown in FIG. 3 is applied to a minute hand; FIG. 4 is an enlarged rear view showing a second modified example in which the pointer shown in FIG. 3 is applied to the hour hand; FIG. 3 is an enlarged rear view showing a third modified example in which the second hand is provided with concentric grooves that are discontinuous in the circumferential direction around the mounting hole in the peripheral portion of the mounting hole in the needle body shown in FIG. 2. FIG. 10 is an enlarged rear view showing a fourth modified example in which the minute hand is provided with concentric grooves that are discontinuous in the circumferential direction around the mounting hole in the peripheral portion of the mounting hole in the needle body shown in FIG. 2. FIG. 10 is an enlarged rear view showing a fifth modified example in which the hour hand is provided with concentric grooves that are discontinuous in the circumferential direction around the mounting hole in the peripheral portion of the mounting hole in the needle body shown in FIG. 2. FIG.

An embodiment in which the present invention is applied to a wristwatch will be described below with reference to FIGS. 1 to 7. FIG.
This wristwatch comprises a timepiece module 1 as shown in FIG. This timepiece module 1 is to be incorporated in a wristwatch case (not shown) and has a housing 2 . A dial plate 3 is arranged on the upper surface of the housing 2 , and a timepiece movement 4 is provided inside the housing 2 .

This timepiece movement 4, as shown in FIG. 1, has a pointer shaft 5 that protrudes upward from the dial plate 3 through a through hole 3a of the dial plate 3, and a pointer 6 is attached to the upper end of the pointer shaft 5. It is configured. Thus, the timepiece movement 4 is configured to indicate the time by rotating the pointer shaft 5 and moving the pointer 6 above the dial 3 .

In this case, the pointer 6 is a second hand S, as shown in FIGS. is configured to The needle body 7 is made of metal such as aluminum or synthetic resin, and is preferably made of metal such as aluminum.

As shown in FIGS. 2 and 3, this needle body 7 is formed in a long and narrow plate shape. That is, the needle body 7 is formed in a plate shape with one end 7a (the left end in FIG. 3) being wide and the other end 7b (the right end in FIG. 3) gradually tapering off. For this reason, the needle body 7 is configured such that the center of gravity is located at a position greatly biased toward one end 7a (the left end in FIG. 3) in the longitudinal direction.

In this case, as shown in FIG. 3, the needle body 7 has a circular portion 7c that protrudes laterally at the portion corresponding to the center of gravity thereof. A circular mounting hole 9 is provided through the circular portion 7c of the needle body 7 vertically. Therefore, the circular portion 7c constitutes the peripheral portion of the mounting hole 9. As shown in FIG. As a result, the needle body 7 is configured such that the center of gravity is located on the central axis of the mounting hole 9 .

That is, as shown in FIG. 3, the needle body 7 has a length on the one end 7a side (left side in FIG. 3) with respect to the mounting hole 9, and a length on the other end 7b side (right side in FIG. 3). It is formed shorter than the length. One end 7a of the needle body 7 gradually narrows in width from the tip (the left end in FIG. 3) toward the mounting hole 9, and the other end 7b extends from the mounting hole 9 to the tip (the left end in FIG. 3). is formed so as to gradually taper toward the right end). As a result, the needle body 7 is formed such that its center of gravity is substantially aligned with the central axis of the mounting hole 9 .

On the other hand, as shown in FIGS. 4 to 6, the needle mounting member 8 includes a cylindrical portion 10 into which the pointer shaft 5 is inserted, and a mounting member provided on the outer peripheral surface of the cylindrical portion 10 for mounting the needle main body 7. A holding portion 11 is provided for holding the peripheral portion of the hole 9, that is, the circular portion 7c of the needle body 7 in its thickness direction. In this case, the needle mounting member 8 is made of metal such as brass or aluminum, and is preferably made of brass which is harder than aluminum.

As shown in FIGS. 4 to 6, the cylindrical portion 10 of the needle mounting member 8 has a circular shaft mounting hole 12 penetrating vertically through the central portion thereof. The shaft mounting hole 12 is formed to have a size that allows the pointer shaft 5 to be inserted and fitted. The cylindrical portion 10 is formed in a circular shape with an outer diameter approximately equal to the inner diameter of the mounting hole 9 of the needle body 7 . As a result, the cylindrical portion 10 has a circular outer shape and a circular inner cylindrical shape.

As shown in FIGS. 4 to 6, the clamping portion 11 of the needle mounting member 8 is pressed against the upper surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 of the needle body 7. and a crimped portion 14 that is pressed against the lower surface of the circular portion 7c of the needle body 7 by crimping. The pressing portion 13 has an outer diameter larger than the inner diameter of the mounting hole 9 of the needle body 7 and is equal to or slightly smaller than the outer diameter of the circular portion 7c of the needle body 7 .

As shown in FIG. 6, the crimped portion 14 has an outer diameter equal to or smaller than the inner diameter of the mounting hole 9 of the needle body 7 before being crimped. It is structured such that it protrudes downward from the needle body 7 when it is inserted into the needle body 7 from above. 4 and 5, the crimped portion 14 is inserted into the mounting hole 9 of the needle body 7 from above and crimped in a state of protruding downward from the needle body 7. , the lower surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 of the needle body 7. As shown in FIG.

That is, as shown in FIG. 6, the crimped portion 14 is formed on the lower outer periphery of the cylindrical portion 10 by forming a substantially inverted V-shaped crimped groove 14a annularly on the lower end surface of the cylindrical portion 10. It is As a result, the crimping portion 14 is bent in a direction projecting from the outer periphery of the cylindrical portion 10 by inserting a crimping jig (not shown) called a chisel into the crimping groove 14a and performing the crimping process. It is structured such that it deforms and is pressed against the lower surface of the circular portion 7c of the needle body 7. As shown in FIG. Therefore, since the crimping portion 14 does not require a high crimping force, it has a structure that does not deform the needle body 7 .

In this case, as shown in FIGS. 4 and 5, the crimped portion 14 has an outer diameter larger than the inner diameter of the mounting hole 9 of the needle body 7 and an outer diameter of the pressing portion 13 when crimped by the crimping process. It is configured to be formed in a size smaller than the diameter. As a result, the holding portion 11 moves the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 of the needle body 7, in the thickness direction (vertical direction) by means of the crimped portion 14 and the pressing portion 13. It has a sandwich structure.

By the way, on the lower surface of the circular portion 7c of the needle body 7 which is the peripheral portion of the attachment hole 9 of the needle body 7, that is, on the lower surface of the circular portion 7c of the needle body 7 corresponding to the crimped portion 14 of the clamping portion 11, FIGS. As shown in FIG. 6, a plurality of grooves 15 are provided radially. These grooves 15 provide frictional resistance in the rotational direction of the needle body 7 between the circular part 7c of the needle body 7 and the clamping part 13 of the clamping part 11 and the crimped part 14 when the circular part 7c is clamped between them. is increased to increase the fixing torque of the needle body 7 to the needle mounting member 8 .

Each of the plurality of grooves 15 is formed by cutting, pressing, laser processing, or the like, but is preferably formed by laser processing using a laser beam R, as shown in FIG. In this case, among the plurality of grooves 15, the plurality of grooves 15 provided on the lower surface of the circular portion 7c of the needle body 7 are within the contact area where the pressing portion 13 of the needle mounting member 8 contacts the upper surface of the circular portion 7c. provided in corresponding regions.

As a result, the plurality of grooves 15 provided on the lower surface of the circular portion 7c of the needle body 7 are within the same contact area as the circular portion 7c of the needle body 7 covered by the pressing portion 13, as shown in FIGS. , so that it is hidden from view from above the needle body 7 and is provided so as not to impair the appearance.

Further, as shown in FIG. 5, each of the plurality of grooves 15 is formed to a depth that does not affect the exterior surface due to the heat of laser processing and that does not cause insufficient strength of the needle body 7. It is That is, the depth D of the plurality of grooves 15 is in the range of 1/3 to 1/8 of the thickness T of the needle body 7, preferably about 1/5 of the thickness T of the needle body 7. FIG. Further, as shown in FIG. 7, the groove 15 is provided with a raised portion 16 at the edge of the groove 15 due to the characteristics of laser processing when laser processing is performed.

As shown in FIG. 7, the raised portion 16 is formed to have a slight height of about 1/3 to 1/4 of the depth D of the groove portion 15. As shown in FIG. When the circular portion 7c of the needle body 7, which is the peripheral edge of the mounting hole 9 of the needle body 7, is sandwiched between the pressing portion 13 and the crimped portion 14 of the clamping portion 11, the raised portion 16 causes the needle to sag. It is structured to be crushed by the crimped portion 14 of the needle mounting member 8 which is harder than the main body 7 .

As a result, as shown in FIGS. 4, 5 and 7, the circular portion 7c of the needle body 7 is sandwiched between the holding portion 13 and the crimped portion 14 of the sandwiching portion 11, and the raised portion 16 is formed. By being crushed, the frictional resistance in the rotational direction of the needle body 7 between the circular portion 7c of the needle body 7 and the pinching portion 11 of the needle mounting member 8 is further increased, and the needle body 7 is pressed against the needle mounting member 8. It is configured to further increase the fixing torque.

Next, a method for manufacturing this indicator 6 will be described.
This manufacturing method includes a first step of forming a plurality of grooves 15 in needle body 7 and a second step of fixing needle body 7 to needle mounting member 8 . That is, in the first step, a mounting hole 9 is formed in the circular portion 7c of the needle body 7, and a plurality of grooves 15 are formed in the lower surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9, by laser processing. Form radially.

In this case, a plurality of grooves 15 are provided on the lower surface of the circular portion 7c of the needle body 7 corresponding to the contact area where the pressing portion 13 of the needle mounting member 8 contacts the upper surface of the circular portion 7c. Accordingly, the plurality of grooves 15 provided in the circular portion 7c of the needle body 7 are provided so as to be hidden from view from above the needle body 7. As shown in FIG. Therefore, the appearance of the needle body 7 is not spoiled by the plurality of grooves 15 .

Further, at this time, the depth D of the groove portion 15 is formed within the range of 1/3 to 1/8 of the thickness T of the needle body 7, preferably about 1/5 of the thickness T of the needle body 7. That is, the plurality of grooves 15 are formed to a depth that does not affect the exterior surface due to the heat of the laser processing and that does not cause the needle body 7 to lack strength. At this time, the edges of the groove 15 swell due to the characteristics of the laser processing to form a raised portion 16 . The raised portion 16 is formed to have a slight height of about 1/3 to 1/4 of the depth D of the groove portion 15 .

In the second step, the cylindrical portion 10 of the needle mounting member 8 is inserted into the mounting hole 9 provided in the circular portion 7c of the needle body 7, and the presser portion 13 of the needle mounting member 8 is pressed against the circular portion of the needle body 7. It is placed on the upper surface of 7c. At this time, the crimped portion 14 is arranged below the circular portion 7c of the needle body 7 through the mounting hole 9 of the needle body 7. As shown in FIG. In this state, the crimped portion 14 is crimped by a crimping process and pressed against the lower surface of the circular portion 7c of the needle body 7. As shown in FIG.

That is, when crimping the crimping portion 14, a crimping jig (not shown) called a chisel is inserted into the crimping groove 14a provided in the lower end surface of the tubular portion 10 of the needle mounting member 8. Crimping process. Then, the crimped portion 14 is deformed so as to be bent in a direction protruding from the outer circumference of the tubular portion 10 . Therefore, when the crimping portion 14 is crimped, a high crimping force is not required, so the crimping portion 14 can be crimped without deforming the needle body 7 .

As a result, the crimped portion 14 is pressed against the lower surface of the circular portion 7c of the needle body 7, and the circular portion 7c of the needle body 7 is pressed against the pressing portion 13 of the needle mounting member 8. As shown in FIG. As a result, the circular portion 7c of the needle body 7 is clamped between the pressing portion 13 and the crimped portion 14 of the clamping portion 11 with a plurality of grooves 15 interposed therebetween. At this time, the plurality of grooves 15 increase the rotational frictional resistance of the circular portion 7c of the needle body 7 against the needle mounting member 8, and the fixing torque of the needle body 7 to the needle mounting member 8 is increased.

Further, at this time, since the needle mounting member 8 is harder than the needle body 7, when the circular portion 7c of the needle body 7 is sandwiched between the presser portion 13 and the crimped portion 14 of the needle mounting member 8, the presser foot will not move. The raised portion 16 is crushed by the portion 13 and the crimped portion 14 . That is, the raised portion 16 of the groove portion 15 provided on the lower surface of the circular portion 7c of the needle body 7 is crushed by the crimped portion 14 of the needle mounting member 8. As shown in FIG.

In this way, when the circular portion 7c of the needle body 7 is sandwiched between the pressing portion 13 and the crimped portion 14 of the clamping portion 11 and the raised portion 16 is crushed, the circular portion 7c of the needle body 7 and the crimped portion 14 are crushed. The frictional resistance in the rotational direction of the needle body 7 between itself and the clamping portion 11 of the needle mounting member 8 is further increased, and the fixing torque of the needle body 7 to the needle mounting member 8 is further increased. The pointer 6 is thereby assembled.

As described above, according to the method of manufacturing the pointer 6, the first step of forming the plurality of grooves 15 on the lower surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 provided in the needle body 7; , the needle mounting member 8 is inserted into the mounting hole 9 of the needle body 7, and the clamping portion 11 is caulked in a state in which a plurality of grooves 15 are aligned between the clamping portion 11 and the circular portion 7c of the needle body 7. a second step of fixing the needle body 7 to the needle mounting member 8 by sandwiching the circular portion 7c of the needle body 7, which is the peripheral portion of the mounting hole 9, with the Deformation is prevented, and the needle body 7 is well fixed to the needle mounting member 8, so that quality can be ensured.

That is, in the method of manufacturing the pointer 6, a plurality of grooves 15 are provided in the lower surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 of the needle body 7, in the first step. In the process of (1), when the holding portion 11 pinches the circular portion 7c of the needle body 7, which is the peripheral portion of the mounting hole 9 of the needle body 7, by caulking, there is a gap between the holding portion 11 and the circular portion 7c of the needle body 7. , the frictional resistance of the circular portion 7c of the needle body 7 against the needle mounting member 8 in the rotational direction can be increased.

Therefore, in this method of manufacturing the pointer 6, the rotational frictional resistance of the circular portion 7c of the needle body 7 with respect to the needle mounting member 8 is increased, so that the fixing torque of the needle body 7 with respect to the needle mounting member 8 is increased. As a result, deformation of the needle body 7 due to caulking can be prevented, and the needle body 7 can be reliably and favorably fixed to the needle mounting member 8, so that quality can be ensured.

In this case, in the first step, a plurality of grooves 15 are provided on the lower surface of the circular portion 7c of the needle body 7, which is the peripheral edge of the mounting hole 9 of the needle body 7, and which is one surface corresponding to the crimped side of the clamping portion 11. As a result, when the holding portion 11 is crimped, the crimped holding portion 11 can be reliably pressed against the lower surface of the circular portion 7c of the needle body 7 provided with the plurality of grooves 15. Frictional resistance in the rotational direction of the circular portion 7c of the needle body 7 against the mounting member 8 can be increased.

In the first step, a plurality of grooves 15 are formed in the lower surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 of the needle body 7, by laser processing. Since the raised portions 16 can be formed at each edge of the groove portion 15, the raised portions 16 further increase the rotational frictional resistance of the circular portion 7c of the needle body 7 against the needle mounting member 8. , the fixing torque of the needle body 7 to the needle mounting member 8 can be further increased.

That is, in the second step, the needle mounting member 8 is harder than the needle body 7, and a plurality of grooves 15 are provided on the lower surface of the circular portion 7c of the needle body 7, which is the periphery of the mounting hole 9 of the needle body 7. Therefore, when the holding portion 11 holds the circular portion 7c of the needle main body 7 by crimping, the raised portion 16 can be crushed by the holding portion 11 of the needle mounting member 8. Friction resistance in the rotational direction of the circular portion 7c of the needle body 7 against the needle mounting member 8 can be further increased, and the fixing torque of the needle body 7 to the needle mounting member 8 can be sufficiently increased.

According to the pointer 6, the needle body 7 provided with the mounting hole 9 and the holding portion for sandwiching the circular portion 7c of the needle body 7, which is the peripheral edge of the mounting hole 9, by crimping in the thickness direction. A plurality of grooves 15 are provided corresponding to the clamping portions 11 on the lower surface of the circular portion 7c of the needle body 7 sandwiched by the clamping portions 11 of the needle mounting member 8. As a result, deformation of the needle body 7 can be prevented, and the needle body 7 can be satisfactorily fixed to the needle mounting member 8, thereby ensuring quality.

That is, in this pointer 6, when the circular portion 7c of the needle main body 7, which is the peripheral portion of the mounting hole 9 of the needle main body 7, is clamped by the holding portion 11 by caulking, the lower surface of the circular portion 7c of the needle main body 7 is bent. A plurality of grooves 15 provided are interposed between the clamping portion 11 and the circular portion 7c of the needle body 7, and the interposed plurality of grooves 15 allow rotation of the needle body 7 in the circular portion 7c with respect to the needle mounting member 8. Directional frictional resistance can be increased.

Therefore, in this pointer 6, the frictional resistance in the rotational direction of the circular portion 7c of the needle body 7 against the needle mounting member 8 is increased, so that the fixing torque of the needle body 7 to the needle mounting member 8 can be increased. Therefore, deformation of the needle body 7 due to caulking can be prevented, and the needle body 7 can be reliably and favorably fixed to the needle mounting member 8, so that quality can be ensured.

Further, in this pointer 6, since the raised portions 16 are provided at the respective edges of the plurality of grooves 15, the clamping portion 11 of the needle mounting member 8, which is harder than the needle body 7, is crimped to the needle body. When the circular portion 7c of the needle body 7, which is the peripheral portion of the mounting hole 9 of the needle mounting member 7, is clamped, the raised portion 16 can be crushed by the clamping portion 11 of the needle mounting member 8. Frictional resistance in the rotational direction of the circular portion 7c of the needle body 7 can be further increased, and the fixing torque of the needle body 7 to the needle mounting member 8 can be sufficiently increased.

In this case, in this pointer 6, the clamping portion 11 is provided with a pressing portion 13 that is pressed against the upper surface of the circular portion 7c of the needle body 7, which is the peripheral portion of the mounting hole 9 of the needle body 7, and the circular portion 7c of the needle body 7. Since the lower surface of the needle body 7 is provided with the crimped portion 14 that is pressed against the crimped portion 14, the circular portion 7c of the needle main body 7 is securely held between the pressing portion 13 and the crimped portion 14 by crimping the crimped portion 14. It can be clamped easily and well.

That is, in the pointer 6, when the crimping portion 14 is crimped, a crimping jig (not shown) called a chisel is inserted into the crimping groove 14a provided in the lower end surface of the cylindrical portion 10 of the needle mounting member 8. By inserting and crimping, the crimped portion 14 can be deformed so as to be bent in a direction projecting from the outer periphery of the tubular portion 10 . Therefore, when the crimped portion 14 is crimped, a high crimping force is not required, and the crimped portion 14 can be crimped well without deforming the needle body 7 .

As a result, in the pointer 6, the crimped portion 14 can be reliably pressed against the lower surface of the circular portion 7c of the needle body 7 by crimping, and the upper surface of the circular portion 7c of the needle body 7 can be reliably pressed against the pressing portion 13. Since they can be pressed against each other, the circular portion 7c of the needle body 7 can be reliably and favorably sandwiched between the pressing portion 13 and the crimped portion 14.例文帳に追加

Further, in this pointer 6 , a plurality of grooves 15 are provided radially around the mounting hole 9 , so that the holding portion 13 and the crimped portion 14 of the needle mounting member 8 move the mounting hole 9 of the needle body 7 . When the circular portion 7c of the needle body 7, which is the peripheral edge of the needle body 7, is clamped, the circular portion 7c of the needle body 7 against the needle mounting member 8 also reduces frictional resistance in the rotational direction due to the plurality of grooves 15 provided radially. It can be increased to increase the fixing torque of the needle body 7 to the needle mounting member 8 .

In the above-described embodiment, a case where a plurality of grooves 15 are provided on the lower surface of the circular portion 7c of the needle body 7, which is the peripheral portion of the mounting hole 9 of the needle body 7, has been described. For example, a structure in which a plurality of grooves 15 are provided on the upper surface of the circular portion 7c of the needle body 7 may be used. Moreover, the present invention is not limited to this, and may have a structure in which a plurality of grooves 15 are provided on both upper and lower surfaces of the circular portion 7c of the needle body 7, for example.

Further, in the above-described embodiment, the case where a plurality of grooves 15 are provided on the upper surface and the lower surface of the circular portion 7c of the needle body 7 has been described, but the present invention is not limited to this. A structure in which a plurality of grooves are provided on the inner peripheral surface (periphery) of 9 may be used.

Further, in the above-described embodiment, a case where a plurality of grooves 15 are provided in the needle body 7 has been described, but the present invention is not limited to this, and for example, a plurality of grooves 15 are provided in the clamping portion 11 of the needle mounting member 8. It may be of a similar structure.

Further, in the above-described embodiment, the case where the pointer 6 is the second hand S has been described, but the present invention is not limited to this. Alternatively, the pointer 6 may be the hour hand H as in the second modification shown in FIG.

Further, in the above-described embodiment and its first and second modifications, the case where the plurality of grooves 15 are radially provided around the mounting hole 9 has been described, but the present invention is not limited to this, For example, as in the third modification shown in FIG. 10, a plurality of grooves 25 are formed in the peripheral edge of the mounting hole 9 in the needle main body 7 of the pointer, which is the second hand S, in a discontinuous state in the circumferential direction with the mounting hole 9 as the center. A structure provided concentrically may be used.

Further, the present invention is not limited to this, and for example, as in a fourth modification shown in FIG. It may be a structure provided in a discontinuous concentric shape in the circumferential direction around the center. Moreover, the present invention is not limited to this, and for example, as in a fifth modification shown in FIG. It may be a structure provided in a discontinuous concentric shape in the circumferential direction around the center.

Further, in the present invention, the plurality of grooves 25 does not necessarily need to be provided in a discontinuous concentric shape in the circumferential direction around the mounting hole 9 . They may be provided in concentric circles that are continuous in the circumferential direction.

Furthermore, in the above-described embodiment and its first to fifth modifications, the case of application to a pointer-type wristwatch has been described, but the wristwatch does not necessarily have to be a wristwatch. It can be applied to various pointer-type timepieces. Moreover, the present invention does not necessarily have to be a pointer of a watch, and can be applied to a pointer of instruments such as a meter.

Although several embodiments of the present invention have been described above, the present invention is not limited to these, and includes the invention described in the claims and their equivalents.
The invention described in the claims of the present application will be additionally described below.

(Appendix)
The invention according to claim 1 comprises: a first step of forming a groove in the periphery of a mounting hole provided in a needle body; and inserting a needle mounting member into the mounting hole of the needle body. and a second step of fixing the needle body to the needle mounting member by sandwiching the peripheral edge portion of the mounting hole with a clamping portion provided in the mounting hole for clamping the peripheral edge portion of the mounting hole. A manufacturing method for a guideline characterized by:

According to a second aspect of the invention, in the method of manufacturing a pointer according to the first aspect, in the second step, the holding portion pinches the peripheral edge portion of the mounting hole by caulking, and the first step Then, the method of manufacturing a pointer is characterized in that the groove is provided on one side of the peripheral edge of the mounting hole of the needle body corresponding to the crimped side of the clamping portion.

According to a third aspect of the invention, in the method of manufacturing a pointer according to the first or second aspect, in the first step, the groove is formed by laser processing, and the edge of the groove is raised. A manufacturing method of a pointer characterized by providing a part.

According to a fourth aspect of the invention, in the method of manufacturing a pointer according to the second aspect, in the second step, when the needle mounting member is harder than the needle main body, the raised portion is This method of manufacturing a pointer is characterized in that the clamping portion of the needle mounting member is crushed.

According to a fifth aspect of the invention, there is provided a needle body provided with a mounting hole, and a needle mounting member provided with a clamping portion for clamping the periphery of the mounting hole, wherein the clamping of the needle mounting member is performed. The pointer is characterized in that a groove is provided in the periphery of the mounting hole of the needle body sandwiched between the portions corresponding to the sandwiching portion.

The invention according to claim 6 is the pointer according to claim 5, wherein the edge of the groove is provided with a raised portion.

The invention according to claim 7 is the pointer according to any one of claims 5 and 6, wherein the clamping part includes a pressing part that is brought into contact with one of the upper and lower surfaces of the peripheral edge part of the mounting hole; and a crimped portion that is brought into contact with the other of the upper and lower surfaces of the peripheral portion of the mounting hole by crimping.

The invention according to claim 8 is the pointer according to claim 7, wherein the groove portion is provided on one surface corresponding to the crimped portion of the holding portion in the peripheral edge portion of the mounting hole of the needle body. It is a guideline characterized by

The invention according to claim 9 is the pointer according to any one of claims 5 to 8, wherein the groove is radially centered on the mounting hole, or radially centered on the mounting hole. This pointer is characterized by being provided in a continuous concentric circle.

According to a tenth aspect of the invention, there is provided a timepiece comprising the hands according to any one of the fifth to ninth aspects.

1 timepiece module 4 timepiece movement 5 pointer shaft 6 pointer 7 needle body 7a one end 7b other end 7c circular portion 8 needle mounting member 9 mounting hole 10 cylindrical portion 11 clamping portion 12 shaft mounting hole 13 pressing portion 14 crimping portion 14a crimping Grooves 15, 25 Grooves 16 Rising portion R Laser beam D Depth T Thickness

Claims (9)

a first step of providing a groove on the periphery of a mounting hole provided in the needle body and a raised portion on the edge of the groove ;
A needle mounting member is inserted into the mounting hole of the needle body, and a clamping portion provided in the needle mounting member for clamping the peripheral edge portion of the mounting hole clamps the peripheral edge portion of the mounting hole, a second step of securing the needle body to the needle mounting member;
A method of manufacturing a pointer, characterized by comprising: 2. The method of manufacturing a pointer according to claim 1, wherein in the second step, the clamping portion clamps the peripheral edge portion of the mounting hole by caulking, and in the first step, the groove portion is formed in the needle body. A method of manufacturing a pointer, characterized in that the pointer is provided on one surface corresponding to the crimped side of the clamping portion in the peripheral portion of the mounting hole. 3. The method of manufacturing a pointer according to claim 1, wherein in said first step, said groove is formed by laser processing to provide said raised portion. 4. The method of manufacturing a pointer according to claim 1 , wherein, in the second step, if the needle mounting member is harder than the needle main body, the protuberance is formed by the needle mounting member. A method of manufacturing a pointer, wherein the pinching portion of the member is crushed. a needle body provided with a mounting hole;
a needle mounting member provided with a clamping portion for clamping the periphery of the mounting hole;
with
a groove corresponding to the holding portion is provided in the peripheral portion of the mounting hole of the needle body sandwiched by the holding portion of the needle mounting member ;
A pointer, wherein a raised portion is provided on an edge of the groove . 6. A pointer according to claim 5 , wherein said clamping portion includes a holding portion that abuts against one of the upper and lower surfaces of said peripheral portion of said mounting hole, and a pressing portion that abuts against the other of said upper and lower surfaces of said peripheral portion of said mounting hole by caulking. A pointer characterized by comprising: a crimped portion; 7. A pointer according to claim 6 , wherein said groove is provided on one surface of said peripheral portion of said attachment hole of said needle body corresponding to said crimped portion of said clamping portion. In the pointer according to any one of claims 5 to 7 , the grooves are provided radially around the mounting hole, or concentrically discontinuously around the mounting hole in the circumferential direction. guidelines characterized by A timepiece comprising the pointer according to any one of claims 5 to 8 .

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