TWI327492B - - Google Patents

Description

1327492 IX. Description of the Invention: [Technical Field to Which the Invention Is Ascribed] The present invention relates to a method of manufacturing a cylindrical case. [Prior Art]

In the mobile phone, a condenser microphone is used. The condenser microphone has a cylindrical case. In addition, in recent years, the overall size of the condenser microphone is becoming smaller (small size). Specifically, in the past cylindrical case, an aluminum plate having a thickness of 0.3 mm is used. In contrast, in the cylindrical case of recent years, a copper-nickel alloy plate having a thickness of 0.1 mm is used to realize the overall size. Reduced. That is, in recent years, since the overall size has become small, the material is made of nickel-copper-zinc alloy to ensure the strength of the product. However, since the characteristics (electric distortion, sensitivity) of the microphone are maintained, it is necessary to provide an insulating surface film on the inner side of the cylindrical case. Further, the insulating surface film is not required on the inner surface of the top wall, and only the inner surface of the peripheral wall (the inner peripheral surface is necessary. In the case of manufacturing such a cylindrical case, for example, a sequential conveying press device is used, which is a plate shape The raw material is punched in order. In this case, an insulating material constituting the insulating surface film is applied to one surface of the plate-shaped raw material, and punching is performed in this state, and in the punched cylindrical case 50, as shown in the figure In the entire range of the inner surface 51, the insulating surface film 52 is formed as shown in Fig. 10. Further, the sequential transport pressing device is used, for example, in a method of manufacturing a flange (for example, refer to Patent Document 1). Japanese Patent Laid-Open No. 2 0 0 4 - 1 1 9 8 1 [Invention] 5 312XP/Invention Manual (Supplement)/94-07/94] 10984 1327492 (Problems to be Solved by the Invention) In the cylindrical case 50 formed as shown in Fig. 10 described above, an insulating material is also provided in the unnecessary portions 5 3, 5 4. Therefore, it is necessary to peel off the insulating material of the unnecessary portions 5 3, 5 4 . Situation, for example, using a bead shot (sh 〇tb 1 a St) or the processing of the blade, etc., the insulating material of the portion 5 3, 5 4 is not peeled off. However, the work of the peeling operation is low in accuracy, and a large number of defective products are generated, and such peeling must be required after punching. The work has many manufacturing steps and poor productivity.

Further, as shown in Fig. 11, the vibration motor for a mobile phone or the like includes a pumping unit 55 that is fixed to the shaft 55, a motor housing 57 that receives the coil unit 56, and the like. . Further, the motor casing 57 is composed of a casing main body 59 having a cylindrical body having a top wall 58 and a magnet 62 attached to the inner peripheral surface 61 of the peripheral wall 60 of the casing main body 59, and the shaft 55 is guided by a bearing 64. Inserted into the axial hole 63 of the top wall 58 described above. However, in the past, the motor casing 57 described above was produced by the following method. In other words, as shown in FIGS. 12 and 13 , first, the punching process and the cutting work are performed to form the outer casing main body 59, and operations such as sintering and cutting are performed to form a ring-shaped magnetic body (for example, Ferrite or bismuth compound (rare earth element compound), etc.). Then, the magnetic body Μ is fixed to the inner peripheral surface 61 of the peripheral wall 60 of the outer casing main body 59 by an adhesive or the like, and then the magnetic body 磁 is magnetized to form the magnet 62. As described above, in the past, it is necessary to perform the steps of manufacturing the casing main body 59, the step of processing the magnetic body constituting the magnet 62, and the assembly procedure of attaching the magnetic body to the casing main body 59. As a result, the working hours of 6 312 ΧΡ / invention manual (supplement) / 94-07/94]] 0984 1327492 are many, and the productivity is poor. The present invention has been made to solve the above-mentioned conventional disadvantages, and an object of the present invention is to provide a method of manufacturing a cylindrical case in which an unnecessary portion of a surface film portion forming an insulating surface film is not generated, In addition, it is not necessary to install a step of forming a surface film portion of the magnet portion after the punching step, and the productivity is excellent. (the means to solve the problem)

Then, in the method of manufacturing the cylindrical case of the first aspect of the patent application, the plate-shaped raw material 1 1 having the guide holes 1 2 opened at a predetermined pitch in the longitudinal direction is guided by the above-mentioned guide holes 12 by the sequential conveyance pressing device 8. On the other hand, the cylindrical casing 1 is sequentially punched out, and the surface film portion 13 is formed on the plate-like material 1 1 with reference to the guide hole 1 2, and then the pressing device 8 is transported by the above-described procedure. The step of feeding the sheet-like material 1 1 is performed, and the cylindrical case 1 having the surface film portion 13 is sequentially punched. In the method of manufacturing a cylindrical case according to the second aspect of the invention, the plate-shaped material 1 1 having the guide hole 1 2 opened at a predetermined pitch in the longitudinal direction is guided by the guide hole 12 by the sequential conveyance pressing device 8 The punching is sequentially performed to punch the cylindrical case 1, and is characterized in that it is guided on the above-mentioned plate-shaped raw material 1 1? After the annular surface film portion 13 is formed on the basis of the L 2 2, the step of feeding the plate-shaped material 1 1 by the above-described sequential transport pressing device 8 and sequentially providing the cylindrical case 1 of the surface film portion 13 on the inner peripheral surface 5 Punching. The method for producing a cylindrical case according to the third and fourth aspects of the invention, wherein the plate-shaped material 1 1 is supplied to the sequential delivery press device 8 before the 7 312 ΧΡ / invention specification (supplement) / 94-07/94 ]0984 1327492 The inspection step of the deviation of the surface film portion 13 described above. In the method of manufacturing a cylindrical case according to the fifth aspect of the invention, the plate-shaped raw material 1 1 having the guide hole 1 2 opened at a predetermined pitch in the longitudinal direction is guided by the guide hole 12 by the sequential conveyance pressing device 8 The plate-shaped material 1 1 having the annular surface film portion 13 formed on the basis of the guide hole 12 is supplied to the above-described sequential transport pressing device, which is sequentially fed out to punch the cylindrical case 1 (8) The feeding step is performed, and the cylindrical case 1 in which the surface film portion 13 is provided on the inner peripheral surface 5 is punched in order.

In the method of manufacturing a cylindrical case according to the sixth aspect of the invention, in the plate-shaped material 11 having the surface film portion 13 formed on the basis of the guide hole 12, an inspection step of performing the deviation of the surface film portion 13 or the like is performed. Then, before the supply of the sequential transfer press device 8, the range Η of the cylindrical case 1 including the defective surface film portion 25 which is biased or the like when punched by the above-described sequential transfer press device 8 is punched. In the method of manufacturing a cylindrical case according to the seventh aspect of the invention, in the plate-shaped material 1 1 having the surface film portion 13 formed on the basis of the guide hole 12, the offset of the surface film portion 13 is performed. In the inspection step, the range of the cylindrical case 1 including the defective surface film portion 25 including the offset or the like at the time of punching by the sequential transfer pressing device 8 is applied before the supply of the sequential transfer press device 8 is performed, and the defective mark is applied. 27. The method of manufacturing a cylindrical case according to the eighth aspect of the invention, wherein the cylindrical case 1 subjected to the punching process is used for a casing of a condenser microphone, and the surface film portion 13 is printed on the plate-shaped material 1 1 to constitute Insulating surface film 6 of the condenser microphone housing. 8 312 ΧΡ / invention manual (supplement) /94-07/94〗 丨0984

1327492. The method of manufacturing a cylindrical case according to claim 9, wherein the cylindrical case 1 for punching is a motor case, and the surface film body is configured to be a magnet portion 34 of the motor case. (Effect of the Invention) The method of manufacturing a cylindrical case according to the first aspect of the patent application is to carry out a step of feeding a plate-shaped raw material by means of a transport pressing device, depending on the case. Then, a surface film portion surface film portion is provided on the inner circumferential surface of the cylindrical case to form a guide hole for guiding the guide portion when the plate-shaped raw material of the pressing device is sequentially transported. As a result, in the punching step of the transport pressing device, the punching position of the surface film portion in the order of transporting the pressing device is good, and the surface film portion is formed at a regular position in the punching. That is, the peeling step of the surface film portion after the step of punching the surface film portion is not formed in the necessary portion, and the method for manufacturing the cylindrical case of the second paragraph of the production application patent, and the tube of the case 1 The manufacturing method of the shape cartridge is the same, and the surface film portion is based on the guide hole of the guide portion at the time of the feeding step of the forming device, and the position of the surface film portion is relatively open in the order of the transport pressing device, in the punched cylindrical case. , only in the inner membrane section. In other words, the surface film is not formed in an unnecessary portion, and the surface film portion is formed in the portion, and the work such as the separation step after the punching step is not required, and the productivity is excellent. Patent application No. 3 and 4 of the method for manufacturing a cylindrical case, before the supply of the raw material is carried out in the order of the transfer device, the 312XP/invention specification (supplement)/94-07/94丨丨0984 is performed, and ip 1 3 is performed. The magnetic material is in the order of the secondary punching cylinder. However, the feeding step of the material is not necessarily required to be excellent in the portion necessary for the cylindrical case which is positioned in the opposite position to the hole. The above technique is formed by sequentially transporting pressure. The surface formed by the punching surface is only peeled off at the necessary mask portion, since the above surface film 9

In the inspection procedure such as the partial deviation of 1327492, it is possible to prevent the occurrence of a biased product. In the method of manufacturing a cylindrical case according to the fifth aspect of the invention, in the same manner as in the second aspect, the surface film portion is formed on the basis of a guide hole of the guide portion at the time of the sheet feeding step of the step of transporting the pressing device. The punching position of the pressing device is relatively reversed by the position where the mask portion is disposed, and in the cylindrical case that is punched, only the surface is formed on the inner peripheral surface, that is, the surface film portion is not formed at an unnecessary portion, and only necessary The surface film portion does not require the peeling of the surface film portion after the punching step, and the productivity is excellent. In the method of manufacturing a cylindrical case according to the sixth aspect of the invention, in the case of punching a hole in the sequential conveyance pressing device, the range of the cylindrical case including the film portion including the offset or the like is formed before the supply of the pressing device in the order of delivery, so In the sequential transport pressing device, the cylindrical case including the defective watch is not punched. Therefore, in the good product, the defective product is not mixed, and it is not necessary to inspect the product of the defective product in the good product, and the productivity can be improved. Further, in the case of preventing the use of a defective product as a product, it is possible to provide a method for manufacturing a cylindrical case of the seventh item of the patent application of the stable product, which is formed by a non-film portion including a bias or the like when punching is performed in the sequential conveyance pressing device. The range of the cylindrical case is a bad mark added to the pressing device in the supply order, so when punching is performed by the sequential conveying pressing device, the punch is punched. L includes a cylindrical case of the defective surface film portion. However, since the defective mark is applied to the cylindrical case including the defective surface film portion, it can be easily discriminated in the case of good quality. Therefore, even in this case, the unskilled material such as the 312XP/invention specification (supplement)/94-07/94] 10984 is a good film. The part-shaped separation step utilizes a smooth surface and the mask portion is required to be externally used, and the step of applying the smooth surface can be prevented.

1327492 The use of defective products as products provides a stable product. In the method of manufacturing the cylindrical case of claim 8, the punched case is a condenser microphone case, and an insulating film is formed only on the inner peripheral surface thereof. Thereby, an unnecessary surface such as an inner surface of the top wall can be sequentially manufactured without forming an insulating surface film, and microphone characteristics (electrical distortion, sensitivity: a good condenser microphone case. In addition, since the plate-like raw material can be formed into a constituent insulation Since the surface film portion of the surface film is simple, the processing can be performed in a simple manner. Further, since a defective product such as a positional shift is not used for the electric microphone case, a condenser microphone capable of preventing occurrence of a phenomenon in which the insulating surface film is displaced can be provided. The method of manufacturing a cylindrical case according to claim 9, wherein the punched case is a motor case, and only a portion formed of a magnetic body is formed on an inner circumferential surface thereof, whereby a magnet portion is formed on the inner peripheral surface. The magnetic cylinder can be formed in the punching step of the sequential transport pressing device, and after the punching step, the inner working of the magnetic body constituting the magnet portion can be omitted, and the productivity of the motor can be achieved. [Embodiment] Hereinafter, a specific example of a method for manufacturing a cylindrical case of the present invention will be specifically described with reference to the accompanying drawings. Fig. 3 is a view of the cylindrical case. Method for producing an enlarged cross-sectional view of a cartridge 1. The cartridge 1 is for a condenser microphone housing, as shown in Figs. 3 and 4, which is formed by using a housing body 3 formed with a top wall cylinder The insulating surface film 6 on the inner peripheral surface 5 of the peripheral wall of the outer casing main body 3 is formed. Further, the cylindrical casing 1 has a diameter of 4 to 6 </> and a thickness (pick length) of 1 mm. At this time, 312XP/ In the case of the 4th of the 4th of the 4th, the 4th of the 4th, the 4th, the 4th, the 4th, the 4th, the 1327492 The material of the case main body 3 is formed of, for example, a nickel-copper-zinc alloy having a thickness of 1 mm, and the main component of the insulating surface film 6 is formed of, for example, an epoxy polyester resin. The top wall 2 is provided with a through hole 7. Thus, the outer casing. The main body 3 is made of a nickel-copper-zinc alloy, and as in the case of a condenser microphone casing, the strength of the product can be ensured even when the overall size is reduced. The cartridge manufacturing method uses the sequential transport pressing device 8 as shown in Fig. 5. The sequential transport pressing device 8 includes a top mold 9 that moves up and down, a bottom mold 10 that supports the top mold 9, between the top mold 9 and the bottom mold 10, and a supply plate for the punched cylindrical case 1. The raw material (punching material) 1 1. That is, the top mold 9 has a plurality of punched portions (not shown), and a plurality of processing stages are formed on the sequential transport pressing device 8. Further, the plate-shaped raw material 1 1 In the middle, a plurality of guide holes 1 2 (see FIG. 1 ) are opened at a predetermined pitch in the longitudinal direction, and the guide holes 12 are guided to sequentially feed the plate-shaped material 1 1 . Thereby, the plate-shaped raw material 1 is transported in this order. 1 is sequentially sent to different processing stages like an arrow, and the cylindrical case 1 as a product is punched in the final stage. Further, the plate-like material 1 1 supplied to the sequential transport pressing device 8 constitutes a long-sized strip which is wound in a roll shape and wound around the supply cylinder 14. That is, the plate-like raw material 11 is formed of a metal plate or metal platinum or the like. The method of manufacturing the cylindrical case will be described below using Fig. 1 and the like. First, • From the plate-like material (strip) 1 of Figure 1 (a), as shown in Figure 1 (b), on the sides 1 1 a, 1 1 b side, along its length Direction, according to the specified spacing, open the guide hole 1 2 ··. Next, as shown in Fig. 1(c), the annular surface film portion 13 (in this case, the insulating surface film 6) is printed on the basis of the formed guide hole 1 2 ··. The surface film portion 13 is formed, for example, by screen printing or the like 12 312 XP / invention specification (supplement) / 94-07/94 ] 10984 1327492. In other words, the reference pin is inserted into the guide hole 12 to perform positioning, and in the state of the positioning, the printing of the surface film portion 13 is performed. By program control, the timing of entering and exiting the reference pin, the number of vacuuming, and the adjustment of the positive reaction force in the traveling direction are performed.

Further, the plate-like material 1 1 in the state of Fig. 1 (c) is supplied to the sequential transport pressing device 8. In this case, as shown in FIG. 5, the sequential transport pressing device 8 includes a first stage 15, a second stage 16, a third stage 17, a fourth stage 18, and a 5 stage 19. The first stage 15 is a stage for forming a scribe line for punching the cylindrical case 1 (see FIG. 1(d)), and the second stage 16 is as shown by the circle 2 (a). In the case of the stage in which the outer ring 20 and the concave portion 21 having a trapezoidal cross section are formed, the third stage 17 is a stage on which the concave portion 22 having a rectangular cross section is formed as shown in Fig. 2(b). As shown in Fig. 2(c), the fourth stage 18 is a stage in which the through hole 7 is formed in the bottom wall 23 of the recess 22, and the fifth stage 19 is as shown in Fig. 2(d). As shown, it is a stage that punches the wall portion constituting the recess 2 2 . Thereby, the through hole 24 is formed in the plate-like material 1 1 , and the cylindrical portion 1 is formed by punching the wall portion. At this time, the surface film portion 13 is formed on the inner peripheral surface 5 of the peripheral wall 4, but as shown in Fig. 3, it is provided on the side of the top wall 2 so as to maintain a slight gap S with the top wall 2. As described above, according to the above-described method of manufacturing a cylindrical case, the step of feeding the plate-shaped material 1 of the sequential transfer press device 8 is performed, and the cylindrical case is sequentially punched. In addition, the surface film portion 13 is provided on the inner peripheral surface 5 of the cylindrical case 1, but the guide portion at the time of the step of feeding the plate-shaped material 1 1 for transporting the press device 8 in this order Guide hole 1 2 as reference and 13 312XP / invention manual (supplement) /94-07/941丨0984 1327492

form. Thereby, in the punching step of sequentially transporting the pressing device 8, the position where the surface film portion 13 is disposed does not deviate from the punching position of the sequential conveying and pressing device 8, and is in the cylindrical case 1 which has been punched. The surface film portion 13 is formed only at the inner peripheral surface 5. In other words, the surface film portion 13 is not formed in an unnecessary portion, and the surface film portion 13 is formed only in a necessary portion, and the peeling step of the surface film portion 13 after the punching step is not required, and the productivity is excellent. In particular, the punched cylindrical case 1 is a condenser microphone case, and the insulating surface film 6 is formed only on the inner peripheral surface 5. Thereby, an unnecessary range such as the inner surface of the top wall (upper wall 2) can be sequentially manufactured, and the insulating surface film 6 is not formed, and the condenser microphone casing having excellent microphone characteristics (electrical distortion, sensitivity, etc.) can be produced. Further, since the insulating surface film 6 has a slight gap S between it and the inner surface of the top wall 2, a more accurate condenser microphone casing is formed. Further, the surface film portion 13 constituting the insulating surface film 6 can be formed on the plate-like material 1 1 by printing, and the processing can be performed simply and accurately. Further, since the defective product such as the positional deviation is not used for the condenser microphone case, it is possible to provide a capacitor type microphone case which can prevent the occurrence of a short circuit of the displacement of the insulating surface film 6. However, in the above embodiment, the steps of Figs. 1(a) to 1(d) are sequentially performed, and according to the present invention, it is also a method of only the steps of Fig. 1(d). That is, the steps of Figs. 1(a) to 1(c) may be performed in another factory, and the product supply in the state of Fig. 1 (c) may be sequentially supplied to the pressing device 8. In addition, in the state of FIG. 1(c), before the supply of the pressing device 8 is carried out, the surface film portion 13 is placed at a predetermined position, and the presence or absence of the printing missing portion that is not printed is checked (for example, Inspection like processor) 14 312XP / invention manual (supplement) /94-07/94110984

1327492 steps. In this way, in the case where the defective surface film portion 25 is provided, the effect of not supplying the sheet-like log 1 1 having the defective surface film portion 5 to the order transporting device 8 can be achieved, and no defective product is produced. If there is a defective surface film of the offset or the like, as shown by ®, the range Η larger than the non-mask portion 25 having the defective surface film portion 25 can be punched to form a large through hole 26» As shown in Fig. 6, the defective surface film portion 25 is punched and the plate-shaped material 1 1 is supplied to the sequential transport pressing device 8, and when the cylindrical case 1 is punched, the cylindrical film 1 has a cylindrical shape. In the case where the cartridge 1 is punched, the range of the large through hole 26 is a range of the cylindrical case 1 having the poor surface film portion 25 at the time of punching. Therefore, when the punching is performed, the defective surface film portion is not provided. When the cylindrical case 1 of 25 is punched, the defective product is not mixed in the good product. It is not necessary to inspect the product such as the good product from the good product, and the productivity can be improved. In addition, it can prevent the use of the product as a product and provide a stable product. In addition, as shown in FIG. 7, in the range of the cylindrical case 1 in which the defective surface film portion 25 having the position or the like is formed at the time of punching, the number is not applied (the color of the surface film portion 13 is different from that of the surface film portion 13). Color coloring) 27. As a result, when the plate-shaped material 1 1 in the state shown in Fig. 7 is supplied to the sequential conveyance roller 8, the punched step is performed, and the case 1 having the defective surface film portion is punched. However, since the defective mark 27 is applied to the cylindrical case 1 including the defective surface film portion, it is possible to easily recognize the case where the cylindrical shape is a defective product. Thereby, even in this case, it is possible to prevent the use of the article as a product, and it is possible to provide a stable good product. In addition, in Figure 7 312XP / invention manual (supplement) / 94-07/94110984 love " bucket I 6 good watch, such as the work of the deviation hole step hole ° measurement is not bad, good, such as In the case of the cartridge 25 in which the cartridge 25 is defective, 15 1327492 shows that the colored portion for indicating the defective mark 27 of the defective surface film portion 25 is indicated by a hatched portion, and the range is only on the inner peripheral side of the defective surface film portion 25, apparently, The outer peripheral side of the defective surface film portion 25 may be subjected to a coloring treatment so as to be within the entire range.

However, in the above embodiment, the cylindrical case 1 is a condenser microphone case, but may be a motor case. In this case, as shown in Fig. 8, the surface film portion 13 is made of a magnetic material, and the surface film portion 13 formed of the magnetic material is formed on the plate-like material 1 1 . Further, as the magnetic material, for example, a ferrite or a cerium compound (rare earth element compound) or the like can be used. In other words, the surface film portion 13 formed of the magnetic body 涂敷 is applied on the basis of the guide hole 1 2 ·· of the plate-like material 1 1 . Then, the plate-shaped material 1 1 in which the surface film portion 13 is formed can be supplied to the sequential transport pressing device 8 to punch the cylindrical case 1 as shown in Fig. 9 . At this time, in Fig. 8, the surface film portion 1 3 ·· is disposed along the longitudinal direction of the intermediate portion in the width direction of the plate-like material 1 1 . Thus, the sequential transport pressing device 8 to be used also has a plurality of stages 15··, and a plurality of punching holes corresponding to the surface film portion 13 of the plate-shaped material 1 1 are provided for each stage. unit. Further, even in this case, as shown in Fig. 1 (a), the surface film 13 may be disposed on both side edges 1 1 a ' 1 1 b side of the plate-like material 1 1 along the longitudinal direction thereof. ··. Further, the cylindrical case 1 punched by the sequential transport pressing device 8 is formed by the outer casing main body 31 having the top wall 30 and the inner periphery of the peripheral wall 32 provided to the outer casing main body 31 as indicated by the circle 9. The surface film portion 13 of the magnet portion 34 on the surface 33 is configured. Further, an axial hole 35 is formed in the top wall 30. In this case, the surface film portion 13 constituting the magnet portion 34 is not magnetized by the magnetic force, and the magnetic body as the surface film portion 13 is used as a result of the use of the magnetic film as the surface film portion 13 of 16 312 XP/invention specification (supplement)/94-07/94110984 1327492. Μ Apply magnetic magnetization to complete the motor casing. Thereby, the cylindrical case (horse casing) in which the surface film portion 13 as the magnet portion 34 is formed can be formed on the inner peripheral surface 33 in the step of sequentially punching the pressing device 8, and this past In the manufacturing method, the work of attaching the magnetic body constituting the magnet portion to the inner circumferential surface of the cylindrical body can be omitted, and the productivity of the motor can be improved. Further, in the above manufacturing method, the film thickness value of the magnetic body 形成 forming the surface film portion 13 may not be too large. However, due to the use of ferrite or bismuth compounds, even if the thickness of the magnetic enthalpy is not increased, in the case of a vibration motor for a mobile phone, sufficient magnetic magnetization can be performed. . Thereby, even in the case where the cylindrical case 1 manufactured by the above-described manufacturing method is used as the motor casing, the stable performance of such a motor can be exhibited.

Further, also in the case of manufacturing such a motor casing, the inspection process of the surface film 13 may be performed before the plate-shaped material 1 1 is supplied to the sequential delivery press device 8. Further, if the inspection step is performed and the defective surface film portion 25 is provided, the defective surface film portion 25 may be punched or the defective surface film portion may be punched before the supply of the pressing device 8 as shown in FIG. A bad mark 2 7 is applied to the 2 5 . When the inspection step is performed, the defective product is not mixed in the good product, and it is not necessary to inspect the product inspection such as the defective product from the good product, and the cylindrical case 1 can be easily recognized as a defective product. However, the surface film portion 13 formed in each of the above embodiments has a ring shape (annular shape), but the cylindrical case 1 to be manufactured may have an insulating material, a magnetic material (magnetic material), or the like. The formed surface film portion 13 of the gold 17 312 ΧΡ / invention specification (supplement) / 94-07 / 941 ] 0984 1327492 property cylinder, it is not limited to a condenser microphone housing or motor housing. Therefore, the shape of the surface film portion 13 is not limited to an annular shape, and may be other various shapes such as a circle or a rectangle. Further, the surface film portion 13 may be provided on the inner surface of the top wall 2_ of the punched cylindrical case 1. In this manner, the surface film portion 13 is not annular, and the position of the formed surface film portion 13 may not be on the inner peripheral surface 5 of the peripheral wall 4 of the cylindrical case 1, and according to the manufacturing method, it is possible to form a product to be formed. The cylindrical case 1 in which the surface film portion 13 is placed at a regular position is manufactured. The specific embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the scope of the invention. For example, the number of punching portions at each of the stages 15b in the sequential transport pressing device 8 is arbitrary, and the number of the plate-shaped material 1 1 can be changed in accordance with the amount of conveyance of the plate-shaped material 1 1 . The arrangement pitch of the hole 12 and the surface film portion 13 may also change the size of the surface film portion 13 or the like in accordance with the size or the like of the formed cylindrical case 1. Further, the surface film portions 13 are arranged in two rows in Fig. 1, and are arranged in one row in Fig. 8, but H may be three or more rows, and the number of stages of the sequential transfer pressing device 8 is increased or decreased. Arbitrary. In the above embodiment, the plate-like material 11 supplied to the sequential transport pressing device 8 is a long-sized strip plate wound in a roll shape on the supply cylinder 14, but may be of a predetermined size (different from this). Dimensions) • Plates, etc. Further, the material of the plate-like raw material 1 1 is obviously not limited to nickel-copper. As the zinc alloy, various metals such as aluminum which can be used for sequentially transporting the press device 8 can be used. Further, in the above embodiment, in the case of manufacturing a condenser microphone case, the surface film portion 13 is made of an insulating material mainly composed of a polyester resin, and when the motor case is manufactured, the surface film portion 13 is made of ferrite. Or 18 312XP/Invention Manual (Supplement)/94-07/94丨丨09S4 1327492 A magnetic substance such as a titanium compound, but it is obviously not limited to these components, and can correspond to the use of the cylindrical case 1 to be manufactured, etc. , making various changes. Further, the defective mark 27 of Fig. 7 can also be applied to the inner surface side of the defective surface film portion 25. Thus, the defective mark 27 can be applied only to the side of the defective surface film portion 25, and the defective mark 27 can be applied only to the inner surface side of the defective surface film portion 25, or the defective surface film portion 25 side and the defective surface film portion 25 can be applied. A bad mark 2 7 is applied to the inner side. [Simple description of the map]

1(a) to 1(d) are simplified step views showing a method of manufacturing a cylindrical case of the present invention; Fig. 2 is a view showing a plate-shaped raw material used in the method for producing a cylindrical case, and Fig. 2(a) is a 2 is a simplified enlarged cross-sectional view of the main part of the plate-shaped raw material of the stage, and FIG. 2(b) is a simplified enlarged cross-sectional view of the main part of the plate-shaped raw material of the third stage, and FIG. 2(c) is the fourth stage. The main part of the plate-shaped raw material is simplified in an enlarged cross-sectional view, and Fig. 2 (d) is a simplified enlarged cross-sectional view of the main part of the plate-shaped raw material of the fifth stage; Fig. 3 is an enlarged view of the cylindrical case manufactured by the above-described method of manufacturing the cylindrical case Figure 4 is an enlarged plan view of a cylindrical case manufactured by the above-described method of manufacturing a cylindrical case; Figure 5 is a simplified view of a sequential transfer pressing device used in the method of manufacturing the above-described cylindrical case; A simplified diagram of another plate-shaped raw material used; 19 312XP/Invention Manual (Supplement)/94-07/941丨0984 1327492 Figure 7 is a simplified diagram of still another plate-like raw material used in the above-described method of manufacturing a cylindrical case Figure 8 is another tube of the present invention Simplified steps showing a manufacturing method; 9 is a simplified cross-sectional view of the cylindrical cartridge manufactured by the method of FIG cylindrical cartridge; FIG. 10 is a sectional view showing a process of past cylindrical cartridge manufacturing method of a cylindrical cartridge

Fig. 11 is a simplified cross-sectional view showing a vibration motor used in a mobile phone or the like. Fig. 12 is a simplified view showing a manufacturing procedure of the vibration motor. Fig. 13 is a simplified view of a motor casing of the vibration motor. [Main component symbol description] 1 cylindrical box 2 top wall 3 housing body 4 peripheral wall

5 Inner peripheral surface 6 Insulating surface film 7 Through hole 8 Sequential transport pressing device 9 Upper die 10 Lower die 11 Plate-shaped raw materials 11a, lib Side edges 12 Guide holes 20 312XP / Invention manual (supplement) /94-07/941 〖0984 1327492

13 Surface film portion 14 Supply cylinder 15 First stage 16 Second stage 17 Third stage 18 Fourth stage 19 Fifth stage 20 Outer ring 2 1 Faceted trapezoidal recess 22 Faceted rectangle Concave portion 23 bottom wall 24 through hole 25 defective surface film portion 26 large through hole 27 bad mark 30 top wall 3 1 outer casing main body 32 peripheral wall 33 outer peripheral surface 34 magnet portion 50 cylindrical case 53' 54 does not require 55 shaft 56 coil portion 312XP / invention Instruction manual (supplement) /94-07/941109S4 21 1327492 5 7 Motor housing 58 Top wall 59 Housing body 60 Peripheral wall 6 2 Inner peripheral surface 6 2 Magnet 6 3 Shaft hole 6 4 Bearing

K scribe line Μ magnetic body S gap 22 312 ΧΡ / invention manual (supplement) /94-07/94110984

Claims (1)

1327492 X. Patent application scope: 1. A method for manufacturing a cylindrical box, which uses a sequential transport pressing device (8) to open a plate-shaped raw material (11) having a guide hole (12) at a predetermined interval along a longitudinal direction. The guiding holes (12) are guided and sequentially sent out, and the raw material of the material is described as being in the hole of the special hole.) x 1 / lx The box-shaped tube is oriented on the surface of the hole. Pressing the EI sequence l, R is the original material of the material, and the hole is pushed forward. 11 Γν Box-shaped cylinder \1/ 3 11 Γ\ Ρ Λ° The film surface has a second 2 8 /IX 原 置 钊 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希 希The \ly material hole guide is described by the surface to send the secondary surface 1 and the original material of the guide material is described in the stalker's hole punching \ly 11 box-shaped tube to the hole guide above \ly 11 / IV The surface of the enamel surface is formed as the original material of the slab. \)/ 8 /. The EI, M is placed on the surface of the P 咅 film surface. In the case of the rushing of the box-shaped tube, the method of making the box-shaped tube is carried out by the method of the method. I -* The fourth paragraph is 专 专 3 3 3 3 3 3 3 3 3 3 3 3 3 料 料 8 8 The pressure-feeding sequence is given to the method of the equi-biasing method for the upstream step detection of the β-4 film surface. _ Item i 2 for the first} U 围 I Γν范For the original materials, please refer to the application form. As shown in the above paragraph 4, the upper part of the film on the surface of the film is described as the upper part of the inspection. The BC is used to make the box. • ill species 1 5 hole guide has an opening distance gauge to the long side of the square to the original plate 312XP / invention manual (supplement) /94-07/94110984 23 1327492 material (11) side from the above guide hole (12 )guide A plate-shaped raw material (1) having an annular surface film portion (1 3 ) formed on the basis of the guide hole (1 2 ), which is sequentially punched out to punch the cylindrical case (1) 1) The above-described sequential transport pressing device (8) is supplied to the feeding step, and the cylindrical case (1) provided with the surface film portion (13) on the inner peripheral surface (5) is sequentially punched. The method of manufacturing a cylindrical case according to any one of claims 1 to 5, wherein the plate-shaped raw material (1) having a surface film portion (13) formed on the basis of the guide hole (12) is used. 1) an inspection step of performing the deviation of the surface film portion (13), and then, before the supply of the pressing device (8) in the order of supply, is performed when punching is performed by the above-described sequential conveyance pressing device (8) The range (Η) of the cylindrical case (1) including the defective surface film portion (25) such as the offset is punched. 7. The method of manufacturing a cylindrical case according to any one of claims 1 to 5, wherein the plate-shaped raw material (1) having a surface film portion (13) formed on the basis of the guide hole (12) is used. 1) an inspection step of performing the deviation of the surface film portion (13), and the like, and then, before the supply of the sequential transfer press device (8), the punching is performed in the use of the sequential transfer press device (8). In the range (Η) of the cylindrical case (1) of the defective surface film portion (25) such as the offset, a defective mark (27) is applied. 8. The method of manufacturing a cylindrical case according to any one of claims 1 to 5, wherein the cylindrical case (1) which has been subjected to punching is used for a case of a condenser microphone, and the surface film portion ( 1 3) printed on the plate-like raw material (1 1 ) to form an insulating surface film (6) of the condenser microphone case. 9_ The method of manufacturing a cylindrical box according to any one of claims 1 to 5 of the patent application No. 24 312 / invention specification (supplement) / 94-07/941丨0984 1327492, wherein the cylinder has been punched The case (1) is a motor case, and the surface film portion (13) is made of a magnetic body (?) and serves as a magnet portion (34) of the motor case. 25 312ΧΡ/invention manual (supplement)/94-07/94丨丨09S4