JP5922567B2 - Pressure sensitive element holding device for electronic pen - Google Patents

Description

  The present invention relates to a pressure-sensitive element holding device for an electronic pen mounted inside an electronic pen, for example, for inputting desired information to a computer.

  An electronic pen for inputting desired information to a computer may have a built-in pressure sensitive element that converts the pen pressure at the pen tip into an electric signal, as shown in Patent Document 1, for example. An electronic pen having such a pressure sensitive element needs to have a structure for accurately transmitting the pen pressure applied to the pen tip to the pressure sensitive element.

  Particularly recently, there is a case where the diameter of the electronic pen is required to be reduced. For example, in the conventional electronic pen shown in Patent Document 1, the structure of the housing surrounding the pressure-sensitive element and the pressing member attached to the axial end of the core body Is complicated and has the problem that the assembly work is not easy.

JP-A-5-275283

  The present invention has been made in view of such a situation, and an object of the present invention is to simplify the structure of the housing surrounding the pressure-sensitive element and the pressing member attached to the axial end of the core body. It is an object to provide a pressure-sensitive element holding device for an electronic pen that can be easily attached and can be easily wired.

In order to achieve the above object, a pressure-sensitive element holding device for an electronic pen according to the present invention includes:
Arranged inside the electronic pen and spaced apart from the first core end of the core body having a first core end and a second core end respectively positioned on opposite sides in the axial direction along the axial direction A first terminal and a second terminal,
A pressure-sensitive element holding device for an electronic pen, comprising: a housing having a cover portion that covers the circumference of the pressure-sensitive element held by the first terminal and the second terminal with a half or more of the entire circumference. ,
The first terminal is
A first terminal base extending in the axial direction;
A first element connection formed integrally with the first terminal base and connected from the axial direction to a first surface of a pressure sensitive element disposed at a predetermined distance in the axial direction with respect to the first core end. And having a piece,
The second terminal is
A second terminal base insulated from the first terminal base and extending substantially in parallel;
A second element connection piece formed integrally with the second terminal base and connected from the axial direction to a second surface opposite to the first surface of the pressure sensitive element;
The housing is integrally formed with a core connection piece extending in the axial direction from the cover portion in the direction of the core body, and the core connection piece is fixed to the outer periphery of the first core end of the core body. And
The cover portion is formed with an element insertion hole for inserting the pressure sensitive element from a direction substantially perpendicular to the axial direction.

  In the present invention, since the above-described configuration is employed, the housing can be integrally molded without being divided. Further, the structure of the housing is simple, and the housing can be easily attached to the core body. Furthermore, it is easy to assemble the pressing member that presses the pressure-sensitive element with high accuracy with respect to the pressure-sensitive element, and it is possible to press the pressure-sensitive element with high accuracy. Therefore, the first surface of the pressure sensitive element can be pressed with high accuracy by the pressing member. As a result, the writing pressure applied to the pen tip can be transmitted to the pressure sensitive element with high accuracy.

  Furthermore, in the present invention, after the wire is wound around the core body and the ends of the wire are connected to the first terminal and the second terminal, the pressure-sensitive element is inserted from the element insertion hole of the housing in the direction perpendicular to the axial direction. It can be inserted. Therefore, even when solder or a laser is used when connecting the end of the wire to the first terminal and the second terminal, the heat is not transmitted to the pressure-sensitive element, and a problem due to the heat of the element can be prevented.

  In the present invention, since the first terminal and the second terminal are separated from the first end of the core body, it is effective to reduce the Q value of the coil due to the terminal being placed in contact with the core body. Can be prevented.

  Preferably, the first element connection piece and the second element connection piece can be inserted from the element insertion hole. By comprising in this way, the attachment to the housing of the terminal in which the element connection piece was formed becomes easy. In addition, by inserting these first and second element connection pieces from the element insertion hole, the first and second element connection pieces are also positioned between each other, and the pressure sensitive element is interposed between them. It becomes easy to insert from the element insertion hole.

  The first element connection piece of the first terminal and the second element connection piece of the second terminal may be integrally formed with the housing by insert molding or the like. In that case, the accuracy of the interval between these element connection pieces is improved.

Preferably, the housing has an injection hole for injecting an adhesive from a direction substantially perpendicular to a direction in which the pressure sensitive element is inserted from the element insertion hole,
Through the injection hole, the adhesive can be injected into a connection portion between the first element connection piece and the pressure sensitive element or a connection portion between the second element connection piece and the pressure sensitive element. Preferably the adhesive is a conductive adhesive.

  If there is no injection hole, the pressure sensitive element may be mounted in the housing after injecting the adhesive from the element insertion hole. In contrast, in the case of injecting the adhesive from the injection hole, it is possible to inject the adhesive after the pressure-sensitive element is mounted inside the housing. It becomes easy to connect and fix the element connecting piece and the pressure sensitive element. The element connecting piece and the pressure sensitive element are preferably connected directly, but may be connected via a conductive rubber or the like.

Preferably, the first terminal has a first wire connecting portion to which a first end of a wire wound around the core body is connected,
The second terminal has a second wire connection portion to which the second end of the wire is connected,
The first wire connecting portion and the second wire connecting portion protrude from the outer periphery of the housing.

  With this configuration, the electrical connection between the wire wound around the core body and the pressure-sensitive element and the electrical connection between the pressure-sensitive element and the circuit board are facilitated.

Preferably, the first wire connecting portion is formed on the first element connecting piece,
The second wire connection portion is formed on the second element connection piece.

  When the first element connection piece of the first terminal and the second element connection piece of the second terminal are integrally formed with the housing, the positional relationship between the wire connection portion and the element connection piece is not particularly limited. When the first element connection piece of the first terminal and the second element connection piece of the second terminal are inserted from the element insertion hole of the housing and the terminal is attached to the housing, the housing located on the opposite side of the element insertion hole It is preferable that a protruding hole is formed on the outer peripheral surface so that the wire connecting portion passes through and is exposed to the outside.

  With this configuration, when the first and second element connection pieces are inserted from the element insertion holes of the housing and the terminals are attached to the housing, the wire connection portions formed on the connection pieces become the element insertion holes. It penetrates through the protruding hole on the outer peripheral surface of the housing located on the opposite side and is exposed to the outside. In this case, it becomes easy for the protruding holes to position the first and second element connecting pieces, and to keep the distance between them along the axial direction constant.

The first wire connecting portion may be formed integrally with the first terminal base separately from the first element connecting piece,
The second wire connection portion may be formed integrally with the second terminal base separately from the second element connection piece.

  With this configuration, it becomes easy to separate the element connection piece and the wire connection portion, and even if the wire is connected to the wire connection portion after the pressure sensitive element is attached to the element connection piece, the connection It becomes difficult for heat of time to be transmitted to the pressure sensitive element.

Preferably, a first substrate connection portion is formed on the opposite side of the first element connection piece along the axial direction of the first terminal base,
A second substrate connection portion is formed on the side opposite to the second element connection piece along the axial direction of the second terminal base;
The first substrate connecting portion and the second substrate connecting portion are respectively connected to one end in the axial direction of the circuit board.

  This configuration facilitates the connection between the coil section and the pressure sensitive element and the circuit board, and also facilitates the connection with the capacitor provided on the circuit board, and the resonance circuit used for detecting the position of the electronic pen. Is also easy to form. Further, wiring other than the first terminal and the second terminal is unnecessary, and this also contributes to the miniaturization of the electronic pen.

Preferably, the cover part is formed integrally with the substrate mounting base,
A board mounting pin for positioning and mounting the end of the circuit board is integrally formed on the board mounting base.

  With this configuration, the circuit board can be easily attached, and the circuit board can be attached to the housing by positioning with high accuracy.

  Preferably, a pressing member for pressing the first surface of the pressure sensitive element is mounted between the first core end and the first element connecting piece. Preferably, the pressing member is disposed inside the cover portion.

Preferably, the pressing member has a large diameter portion at a substantially central portion in the axial direction,
The large-diameter portion is held by a housing inner peripheral surface formed on the inner side of the cover portion so that it does not come off in a direction perpendicular to the axial direction and is movable in the axial direction.

  With such a configuration, the pressing member can smoothly move only in the axial direction and press the first surface of the pressure-sensitive element with high accuracy. As a result, the sensitivity of the pressure sensitive element is improved.

Preferably, the first element connecting piece has a through hole (including a notch) through which a pressing tip formed in the pressing member passes,
The pressing tip is configured to be able to press in contact with the first surface of the pressure sensitive element. By configuring the pressing tip of the pressing member to be in contact with the first surface of the pressure-sensitive element so as to be pressed, the pressure-sensitive accuracy of the pressure-sensitive element is improved.

Preferably, an axial hole penetrating in the axial direction is formed in the core body,
A core body is attached to the shaft hole for axial movement,
An end of the core on the first core end side is detachably attached to the pressing member,
The pressing member presses the first surface of the pressure-sensitive element according to the pressure acting on the pen tip provided at the tip of the core body protruding from the second core end.

  By adopting such a configuration, it is possible to detachably configure the core body provided with the pen tip with respect to the pressing member, and the replacement of the core body is facilitated. In addition, since the pressing member is positioned and held with high accuracy between the first core end and the first element connecting piece, the core attached to the pressing member is not rattled inside the electronic pen. Mounted in place.

Preferably, the coil device according to the present invention comprises:
A core body disposed inside the electronic pen and having a first core end and a second core end respectively positioned on opposite sides in the axial direction;
A coil device for an electronic pen having a wire wound around an outer periphery of the core body to form a coil portion;
A first wire guide is provided near the first core end on the outer periphery of the core body, and a second wire guide is provided near the second core end on the outer periphery of the core body. Yes,
The first wire guide protrudes radially outward from the outer periphery of the core body, and has at least one concave first wire passage along the circumferential direction.
The second wire guide protrudes radially outward from the outer periphery of the core body, and has at least one concave second wire passage along the circumferential direction.

Preferably, the wire is wound around the outer periphery of the core body positioned between the first wire guide and the second wire guide through the first wire passage to form the coil portion. , Through the second passage, locked to the second wire guide, pulled out from the second passage through the first passage,
The first lead and the second lead of the wire are drawn from the first passage toward the first core end.

  In the coil device for an electronic pen according to the present invention, a method of forming a coil portion by winding a wire around the outer periphery of the core body is not particularly limited. For example, first, the first lead of the wire is used as the first core of the core body. Secure to the edge. Next, the coil is formed by winding the wire in a coil shape on the outer periphery of the core body located between the first wire guide and the second wire guide through the first wire passage of the first wire guide.

  When winding a wire, the length in the axial direction around which the wire is wound is determined by a predetermined length divided by two wire guides, which facilitates automatic winding of the wire and improves the positioning accuracy of the wire. In addition, predetermined inductance, Q characteristics, frequency characteristics, and the like can be realized with high accuracy, and position detection accuracy with the electronic pen is also improved. Further, since the wire passes through the first passage and the wire is caught by the first wire guide, it is easy to automatically wind the wire around the outer periphery of the core body.

  Further, after the coil portion is formed by winding it in a coil shape on the outer periphery of the core body located between the first wire guide and the second wire guide, the wire is passed through the second passage to the outside of the second wire guide. (The second core end side), where, for example, by winding approximately one turn and then returning to the second passage, the wire is locked to the second wire guide, and by automatic work, the second lead of the wire is Returned from the second passage through the first passage on the outer periphery of the coil portion. That is, even if the outer diameter of the core body is reduced, the automatic wire winding operation becomes extremely easy.

  In addition, since the first lead and the second lead of the wire are drawn from the first passage toward the first core end, the circuit board is attached to the first core end of the core body in the axial direction, so that the coil Wiring between the device and the circuit board is simplified, and the diameter of the pen can also be reduced in this respect.

  As another method for forming a coil portion by winding a wire around the outer periphery of the core body, first, the first lead of the wire is fixed to the first core end of the core body. Next, the wire is directed through the first wire passage of the first wire guide toward the second passage without forming a coil portion. Thereafter, the wire is led out to the outside (second core end side) of the second wire guide through the second passage, and, for example, the wire is then wound around substantially once and then returned to the second passage, whereby the wire is brought into the second wire guide. The coil portion is formed by winding a wire in a coil shape around the outer periphery of the core body positioned between the second wire guide and the first wire guide by automatic operation. Thereafter, the second lead portion of the wire may be pulled out from the first passage toward the first core end.

  Also in this case, the wire is wound around the outer periphery of the core body located between the first wire guide and the second wire guide through the first wire passage so that the coil portion is wound. Formed and locked to the second wire guide through the second passage, and pulled out from the second passage through the first passage, and the first lead and the second lead of the wire from the first passage. It is pulled out in the direction of the first core end.

  A wire holding part for holding the first lead and the second lead of the wire may be provided at the first core end of the core body. In this case, it is easy to hold and fix the first lead of the wire to the wire holding portion, and it is easy to hold and fix the second lead of the wire to the wire holding portion.

  Note that at least one of the first guide wire, the second wire guide, and the wire holding portion may be integrally formed with the core body. As a method for integrally molding, insert molding, magnetic field injection molding (CIM), or the like is used. In the case of insert molding, it is easy to configure at least one of the first guide wire, the second wire guide, and the wire holding portion and the core body from different materials. In the case of magnetic field injection molding, at least one of the first guide wire, the second wire guide, and the wire holding portion and the core body can be made of a magnetic material.

  Preferably, the first passage and the second passage are formed at the same position in the circumferential direction of the core body. In such a structure, when the wire is returned from the second passage through the first passage onto the coil portion after winding, the wire may be moved in a straight line, and the operation is easy. is there. In the present invention, it is not always necessary to return the wire on a straight line.

  Preferably, the positions of the first locking groove and the second locking groove along the circumferential direction of the core body substantially coincide with the circumferential position of the first passage. In such a structure, when the wire is pulled out from the first locking groove toward the first passage and when the wire is pulled out from the first passage toward the second locking groove, the wire is straight. Therefore, the automatic winding operation of the wire is further facilitated.

  The wire is locked to the second wire guide by winding the wire more than 1/8 round around the outer periphery of the core body located between the second core end and the second core end. Also good.

  When the second passage is single along the circumferential direction of the second wire guide, the wire that has passed through the second passage to the outside of the second wire guide returns to the direction of the first passage through the same second passage. There is a need. In that case, the wire is locked to the second wire guide by winding the wire around the outer periphery of the core body located between the second wire guide and the second core end by about one turn or more. Can do.

  However, when the number of the second passages is two or more along the circumferential direction of the second wire guide, the wire that goes out of the second wire guide through one second passage passes through the other second passage. It can be returned to the direction of two terminals. Therefore, the wire can be locked to the second wire guide by winding the wire at least about 1/8 around the outer periphery of the core body located between the second wire guide and the second core end. it can.

In the present invention, a part in the circumferential direction of the first wire guide and a part in the circumferential direction of the second wire guide may be connected to the outer peripheral surface of the core body by a connecting piece extending in the axial direction. ,
The outer periphery of the core body that is not covered with the connecting piece and the outer periphery of the connecting piece may be wound by the wire to constitute the coil portion.

  By connecting the first wire guide and the second wire guide with the connecting piece, the axial distance between the first wire guide and the second guide wire can be easily maintained constant. In addition, it is preferable that the radial thickness of a connection piece is thin compared with the radial thickness of a 1st wire guide and a 2nd wire guide. This is because the wire is wound around the outer periphery of the connecting piece, so that the outer periphery of the coil portion does not exceed the radial thickness of the first wire guide and the second wire guide.

  A third wire guide may be mounted on the outer periphery of the core body between the first wire guide and the second wire guide. Preferably, the third wire guide protrudes radially outward from the outer periphery of the core body and has at least one concave third wire passage along the circumferential direction.

  In such a structure, the outer periphery of the core body located between the third wire guide and the second wire guide or between the third wire guide and the first wire guide It is possible to adjust the inductance of the entire coil device by winding the wire twice or more. Of course, a total of four or more wire guides may be provided, and any two or more wire guides may be integrated in the axial direction.

FIG. 1 is an overall perspective view of a coil device for an electronic pen according to an embodiment of the present invention. 2A is a cross-sectional view of a principal part taken along line II-II shown in FIG. 2B is an enlarged end view of the main part of FIG. 2A. FIG. 3 is a cross-sectional view of an essential part taken along line III-III shown in FIG. FIG. 4 is an exploded perspective view of the coil device shown in FIG. FIG. 5 is an exploded perspective view of the main part of the coil device shown in FIG. 6 is a further exploded perspective view of the housing and the core body shown in FIG. FIG. 7 is an exploded perspective view of FIG. 5 viewed from a different angle. FIG. 8 is a perspective view of a core body and a housing used in a coil device according to another embodiment of the present invention. FIG. 9 is an exploded perspective view of FIG. FIG. 10 is an exploded perspective view of FIG. 9 viewed from a different angle. 11 (A) and 11 (B) are perspective views of a core body used in a coil device according to another embodiment of the present invention. FIG. 12 is a perspective view of a core body used in a coil device according to another embodiment of the present invention. FIG. 13 is a perspective view of a core body used in a coil device according to still another embodiment of the present invention. FIG. 14 is a perspective view of a core body used in a coil device according to still another embodiment of the present invention. 15 is a cross-sectional perspective view of an essential part taken along line XV-XV shown in FIG. FIG. 16 is a perspective view of a main part of a coil device according to still another embodiment of the present invention. FIG. 17 is a perspective view of a main part of a coil device according to still another embodiment of the present invention.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings.

Electronic pen coil device 2 according to an embodiment of the present invention shown in the first embodiment FIG. 1, is mounted inside the electronic pen, together with the position information of the electronic pen, the change information of the use, for example, an electronic pen It is used as a part of a device that transmits information on applied pressure or displacement to a display screen for input such as a tablet in a non-contact manner.

  First, in this embodiment, the principle of detecting the position information of the electronic pen and the usage state of the electronic pen will be briefly described.

  When a tuning circuit (including the coil unit 20 shown in FIG. 1) provided in the electronic pen emits a radio wave having a predetermined tuning frequency, for example, frequency f0, from an input display screen such as a tablet (not shown), the radio wave is transmitted. In response to the excitation, an induced voltage is induced in the coil portion 20 shown in FIG. When the transmission of the radio wave is stopped, a radio wave having a predetermined frequency is transmitted from the coil unit 20 by a current based on the induced voltage. The position of the electronic pen (including the coil device 2) on the tablet (not shown) can be detected by receiving a radio wave transmitted from the tuning circuit including the coil unit 20 with a tablet (not shown).

  The pen tip 6a of the electronic pen core 6 is operated so as to be pressed against the surface of the tablet. At the time of this operation, the core body 6 moves in the axial direction inside the coil portion 20 and presses one surface of the pressure-sensitive element 50 with the pressing member 60 shown in FIGS. In this embodiment, the pressure-sensitive element 50 is configured by a variable capacitance capacitor, and the capacitance changes according to the pressing force (pressing displacement) acting on the element 50.

  The element 50 is connected in parallel to a tuning circuit including the coil unit 20 and a capacitor mounted on the circuit board 100, and the tuning frequency of the tuning circuit is changed according to the pressure applied to the element. In this case, when a radio signal having a frequency f0 is transmitted from a tablet (not shown), the tuning frequency of the tuning circuit is changed, so that the induced voltage generated in the coil unit 20 is out of phase with the non-operating state. Become. For this reason, a radio wave having a phase shifted from that of a radio wave transmitted from a tablet (not shown) is transmitted from the tuning circuit. Therefore, the operation of the electronic pen can be detected by transmitting a radio wave from a tablet (not shown) to excite the tuning circuit and detecting a phase difference in the radio wave emitted from the tuning circuit. In accordance with the phase shift detected from the electronic pen, it is possible to detect the thickness of the line to be realized by the electronic pen, the designated position, the hue or density (lightness) of the designated area, and the like.

  The coil device 2 according to this embodiment for realizing the function of the electronic pen has a core body 4 that can be mounted inside the electronic pen. The core body 4 has a shaft hole 4a penetrating along the longitudinal direction (X axis), and is constituted by a hollow cylinder. The core body 4 is made of a magnetic material, and is made of, for example, a soft magnetic material such as a ferrite material or permalloy, or a magnetic material formed by metal dust molding.

  As shown in FIG. 6, the cylindrical core body 4 is elongated in the X-axis direction along the inside of the electronic pen (not shown), and a base end 4 b serving as a first end located on the opposite side in the axial direction. And a tip 4c as the second end. A core connection piece 84 of the housing 70 described below is joined to the base end 4b by, for example, adhesion.

  As shown in FIGS. 2 to 3, a first terminal 30 a and a second terminal 30 b are attached to the housing 70. As shown in FIG. 5 to FIG. 7, the first terminal 30 a and the second terminal 30 b are composed of two metal terminals that are completely separated and insulated, and are terminal pieces that are stamped and formed from a metal plate. Is formed by bending.

  The first terminal 30a has a first terminal base 36a extending in the X-axis direction, and a first substrate connection claw (an example of a first substrate connection portion) 38a is bent at one end of the base 36a in the X-axis direction. Etc. are formed integrally. The first board connection claw 38a may be bent after the first terminal 30a is attached to the housing 70 described later, or may be bent from the beginning. As shown in FIGS. 100 is inserted into a first connection hole 104a provided at one end in the X-axis direction, and is connected to the circuit of the circuit board 100 there. A capacitor, other circuit elements 106, and the like are mounted on the circuit board 100, and the first board connection claws 38a are electrically connected to those circuits and elements only by being connected to the connection holes 104a.

  As shown in FIGS. 5 to 6, a first connecting piece 40a protruding in the Y-axis direction is formed integrally with the first board connection claw 38a of the first terminal base 36a and the end opposite to the X-axis direction. It is. A first element connection piece 44a extending in a plane direction including the Z axis and the Y axis is integrally formed on the upper portion of the first connecting piece 40a in the Z axis direction.

  The first element connection piece 44a is configured to hold the first element electrode surface 52 that is the pressure-sensitive side end surface in the X-axis direction of the pressure-sensitive element 50. Similarly to the overall shape of the first element electrode surface 52, As a whole, it has a square shape. However, in the present embodiment, the Y-axis direction width of the first element connection piece 44 a is formed to be narrower than the Y-axis direction width of the pressure-sensitive element 50. The first element connecting piece 44a is formed with a pressing pin mounting hole 46 into which a pressing pin (an example of a pressing tip) 64 of the pressing member 60 described later can be detachably inserted from the X-axis direction.

  A pair of first claw portions (an example of a first wire connection portion) 34a having a first locking groove 32a formed therebetween is integrally formed on the upper portion of the first element connection piece 44a in the Z-axis direction. is there. The first claw portion 34a projects from the first projecting hole 76a formed in the housing 70 to the outside of the housing.

  The first locking groove 32a formed in the first claw portion 34a is tapered from the inlet toward the bottom and becomes narrower. The end of the first lead 22a of the wire 22 shown in FIGS. The first lead 22a of the wire 22 is fixed to the terminal 30a only by inserting the portion from the inlet toward the bottom. That is, the inlet width of the first locking groove 32 a is preferably equal to or greater than the outer diameter of the wire 22, and the bottom width of the first locking groove 32 a is preferably equal to or smaller than the outer diameter of the wire 22.

  Next, the second terminal 30b will be described. The second terminal 30b is used as a pair with the first terminal 30a.

  As shown in FIGS. 5 to 6, the second terminal 30b has a second terminal base 36b extending in the X-axis direction in parallel with the first terminal base 36a, and one end of the base 36b in the X-axis direction. In addition, a second substrate connection claw (an example of a second substrate connection portion) 38b is integrally formed by bending or the like. The second board connection claw 38b may be bent after the second terminal 30b is attached to the housing 70 described later, or may be bent from the beginning. As shown in FIGS. 100 is inserted into the second connection hole 104b provided at one end in the X-axis direction, and is connected to the circuit of the circuit board 100 there.

  As shown in FIGS. 5 to 6, a second connecting piece 40b protruding in the Y-axis direction is formed integrally with the second board connection claw 38b of the second terminal base 36b and the end opposite to the X-axis direction. It is. A second element connection piece 44b extending in the plane direction including the Z-axis and the Y-axis is integrally formed on the upper part of the second connecting piece 40b in the Z-axis direction.

  The second element connection piece 44b is configured to hold a second element electrode surface 54 that is opposite to the first element electrode surface 52 of the pressure sensitive element 50, and is similar to the overall shape of the second element electrode surface 54. Moreover, it has a quadrangle as a whole. However, in the present embodiment, the Y-axis direction width of the second element connection piece 44b is formed narrower than the Y-axis direction width of the pressure sensitive element 50, and is the same as the first element connection piece 44a. The first element connection piece 44a and the second element connection piece 44b face each other at a predetermined interval in the X-axis direction, and the pressure-sensitive element 50 is inserted and sandwiched therebetween from below in the Z-axis direction. .

  A pair of second claw portions (an example of a second wire connection portion) 34b having a second locking groove 32b formed therebetween is integrally formed on the upper portion of the second element connection piece 44b in the Z-axis direction. is there. The second claw portion 34b is formed so as to be displaced in the Y-axis direction with respect to the first claw portion 34a, and is shifted from the first protruding hole 76a formed in the housing 70 in the X-axis direction. The second protrusion hole 76b protrudes outside the housing.

  The second locking groove 32b formed in the second claw portion 34b has the same configuration except that it is displaced in the Y-axis direction with respect to the first locking groove 32a of the first claw portion 34a. Have. That is, only the end of the first lead 22a of the wire 22 shown in FIGS. 1 and 4 is inserted into the second locking groove 32b from the inlet toward the bottom, and the first lead 22a of the wire 22 is connected to the terminal 30a. It is supposed to be fixed to.

  In the drawings, the X axis, the Y axis, and the Z axis are perpendicular to each other. In this embodiment, the X axis is the longitudinal direction of the core body 4 and the terminal base 36a, and the Y axis is the first terminal. 30a is a direction in which the first terminal base 36a of the second terminal 30b and the second terminal base 36b of the second terminal 30b are separated, and the Z-axis is such that the element connecting pieces 44a and 44b bend in a substantially vertical direction with respect to the connecting pieces 40a and 40b. The direction corresponds to the insertion direction of the pressure sensitive element 50 described later.

  In the present embodiment, the gap width between the first element connection piece 44 a and the second element connection piece 44 b is preferably set to be equal to or less than the thickness of the pressure sensitive element 50. By doing so, when the element 50 is sandwiched between the first element connection piece 44a and the second element connection piece 44b, the element 50 can be held by the elasticity of the curved pieces 42a and 42b.

  The first element electrode surface 52 and the second element electrode surface 54 of the element 50 only need to be electrically connected to the connection pieces 44a and 44b, respectively, and only the elasticity of the connection pieces 44a and 44b is sufficient. May be held. Alternatively, the electrode surfaces 52 and 54 of the element and the connection pieces 44a and 44b may be connected by a conductive adhesive, a conductive film, a conductive rubber, or the like. When the electrode surfaces 52 and 54 of the element and the connection pieces 44a and 44b are connected by a conductive adhesive, a conductive film, a conductive rubber or the like, respectively, the first element connection piece 44a and the second element connection piece The width of the gap with respect to 44b may be larger than the thickness of the pressure sensitive element 50.

  In the present embodiment, the pressure-sensitive element 50 is an element that converts a change in pressure or displacement into an electric signal. However, the pressure-sensitive element 50 includes a variable capacitance capacitor, and is a first element electrode surface 52 that is the pressure-sensitive surface side of the element 50. The capacitance changes in accordance with the pressing force (pressing displacement) of the pressing member 60 acting on the. The changed electric signal of the electrostatic capacitance is transferred from the connection claws 38a and 38b to the circuit of the circuit board 100 via the connection pieces 44a and 44b connected to the first element electrode surface 52 and the second element electrode surface 54, respectively. Communicated.

  As shown in FIG. 2B, the pressing member 60 has a core body base end mounting hole 62. The rear end of the core body 6 to which the pen tip 6a shown in FIG. 1 is attached is detachably attached to the attachment hole 62 (see FIGS. 2A and 2B). The inner diameter of the mounting hole 62 is determined so that the rear end of the core body 6 is detachably fixed, and is smaller than the inner diameter of the shaft hole 4 a formed in the core body 4. The core body 6 is mounted in the shaft hole 4a of the core body 4 so as to be movable in the X-axis direction together with the pressing member 60.

  A pressing pin 64 protrudes in the X-axis direction and is formed integrally with the mounting hole 62 of the pressing member 60 on the opposite side in the X-axis direction. The tip of the pressing pin 64 is in contact with the first element electrode surface 52 that is the pressure-sensitive surface of the pressure-sensitive element 50 and can be pressed. The outer diameter of the pressing pin 64 is formed smaller than the inner diameter of the pressing pin mounting hole 46 so that the first element connecting piece 44a does not prevent the pressing pin 64 from pressing the element 50.

  When the pen pressure is applied to the pen tip 6a shown in FIG. The first element electrode surface 52 which is the pressure sensitive surface is pressed. The pressing member 60 is made of, for example, a synthetic resin having good sliding characteristics, and a large-diameter portion 66 having a circular cross section whose outer diameter is larger than that of other portions is integrally formed on the outer periphery thereof.

  As shown in FIG. 2B, the large-diameter portion 66 of the pressing member 60 is prevented from shifting in the Y-axis and Z-axis directions by the housing inner peripheral surface 88 formed inside the cover portion 82 of the housing 70 described later. In addition, the pressure sensitive element is held so as to be capable of being moved slightly in the X-axis direction. The pressing member 60 is accommodated in the accommodating inner peripheral surface 88 of the housing 70 before the core connecting piece 84 of the housing 70 is fixed to the base end 4b of the core body 4, and is not fixed to the terminals 30a and 30b. The pressure sensitive element 50 can be pressed.

  Next, the housing 70 will be described in detail. The housing 70 is made of, for example, synthetic resin, and has a substrate mounting base 72 on the base end side in the X-axis direction, as shown in FIG. 2B. The upper surface of the base 72 in the Z-axis direction is formed as a flat surface, and the board mounting pins 74 are formed integrally with the flat upper surface so as to protrude upward in the Z-axis direction.

  One end of the circuit board 100 shown in FIG. 1 is installed on the upper surface of the board mounting base 72, and positioning is performed by fitting the mounting pins 74 of the base 72 into the board mounting holes 102 formed in one end of the board 100. One end of the circuit board 100 can be attached to the upper surface of the base 72 of the housing 70 by means such as adhesion.

  When the circuit board 100 is attached to the upper surface of the base 72, the board connection claws 38a and 38b are preferably bent upward in the Z-axis direction as shown in FIG. If it does so, when attaching the end of the board | substrate 100 to the housing 70 as shown in FIG. 1, board | substrate connection nail | claw 38a, 38b will enter into the connection holes 104a and 104b of the board | substrate 100 simultaneously, and workability | operativity is good.

  As shown in FIGS. 2 to 3, an element connection piece holding portion 80 is integrally formed adjacent to the base 70 along the X-axis direction of the housing 70. The holding unit 80 has a wall surface in the X-axis direction that contacts the opposite element side surface of the element connection piece 44b in the terminal 30b, and the element connection piece 44b and the element 50 are pressed against the circuit board 100 side in the X-axis direction by the pressing pin 64. However, the element 50 is not moved in the X-axis direction.

  A cover portion 82 is formed integrally with the holding portion 80. The cover portion 82 covers the entire circumference of the pressure-sensitive element 50 and the pressing member by a half or more, in the present embodiment. Therefore, most of the outer periphery of the pressure sensitive element 50 sandwiched between the element connecting pieces 44 a and 44 b from the axial direction is covered with the cover portion 82, and the pressure sensitive element 70 can be protected. Moreover, the housing 70 can be integrally formed without the need to divide it in the axial direction.

  In the present embodiment, the upper flat surface 75 is formed on the upper surface in the Z-axis direction of the cover portion 82, and the above-described protruding holes 76 a and 76 b are formed on the flat surface 75. The claw portions 34a and 34b protrude from the holes 76a and 76b. As shown in FIGS. 2B and 7, the projecting holes 76 a and 76 b in the cover portion 82 and the lower flat surface 77 on the opposite side in the Z-axis direction are formed so as to continue to the board mounting base 72. An element insertion hole 78 is formed in the lower flat surface 77 at a position corresponding to the projecting holes 76a and 76b in the cover portion 82, on the side opposite to the projecting holes 76a and 76b.

  In the present embodiment, the first element connection piece 44a of the first terminal 30a can be inserted together with the second element connection piece 44b of the second terminal 30b from the element insertion hole 78. The claw portions a and 34b formed on the upper portions of the pieces 44a and 44b in the Z-axis direction are exposed to the outside from the projecting holes 76a and 76b.

  As shown in FIGS. 3 and 5, injection holes 73a and 73b are formed on both sides of the housing 70 in the Y-axis direction at substantially the same positions as the projecting holes 76a and 76b in the X-axis direction. The widths in the X-axis direction of the injection holes 73a and 73b are preferably equal to or greater than the protrusion holes 76a and 76b.

  Although only one of the injection holes 73a and 73b may be formed, it is preferably formed for each of the injection holes 73a and 73b. These injection holes 73a and 73b may be continued in the X-axis direction. From the injection holes 73a and 73b, for example, a conductive adhesive can be injected into the connection portion between the first element connection piece 44a and the pressure sensitive element 50 or the connection portion between the second element connection piece 44b and the pressure sensitive element 50. It has become.

  As shown in FIGS. 2B and 7, in the cover portion 82, the lower flat surface 77 in the Z-axis direction is interrupted in the middle of the X-axis direction to form a stepped portion 83, which is closer to the core body than the stepped portion 83. Is the circumferential surface 85 except for the upper flat surface 75. The outer diameter of the circumferential surface 85 is larger than the outer diameter of the core body 4. Continuing on the circumferential surface 85 of the cover portion 82, a core connection piece 84 extending in the direction of the core body 4 along the X-axis direction is integrally formed on the cover portion 82.

  The core connecting piece 84 has a shape that is convenient for being connected to the outer periphery of the base end 4b of the core body 4 with an adhesive or the like. The inner diameter of the inner peripheral surface 87 of the core connecting piece 84 is the core body 4 The outer diameter of the housing is larger than the inner diameter of the housing inner peripheral surface 88. Therefore, the upper flat surface 75 is notched at the position where the core connection piece 84 is formed, and the notch 86 is formed.

  Further, the base end 4 b of the core body 4 is abutted against the X-axis direction end portion 86 a of the notch portion 86 and positioned. The X-axis direction end portion 86 a of the notch portion 86 is a boundary between the inner peripheral surfaces 87 and 88 and also a boundary between the cover portion 82 and the connection piece 84.

  Next, the core body 4 and the coil part 20 are demonstrated in detail. As shown in FIGS. 5 to 7, a ring-shaped first wire guide 10 a that protrudes from the outer periphery of the core body 4 as a whole is mounted near the base end 4 b on the outer periphery of the core body 4. As described above, the connection piece 84 of the housing 70 is fixed to the outer periphery of the core body 4 located between the first wire guide 10a and the base end 4b. When the housing 70 is fixed to the core body 4, the first terminal 30 a and the second terminal 30 b are mounted on the housing, and the pressing member 60 is mounted inside the housing 70. It is preferable.

  Further, a second wire guide 10b similar to the first wire guide 10a is mounted on the outer periphery of the core body 4 near the tip 4c. It is preferable that the outer peripheral surface of the core body 4 positioned between the first wire guide 10a and the tip 4c has a gap in the X-axis direction that allows the wire 22 to be wound at least once.

  The first wire guide 10a protrudes radially outward from the outer periphery of the core body 4, and has at least one concave first wire passage 12a along the circumferential direction. Similarly to the first wire guide 10a, the second wire guide 10b also protrudes radially outward from the outer periphery of the core body 4, and has at least one concave second wire passage 12b along the circumferential direction.

  In the present embodiment, the guides 10a and 10b are formed by ring-shaped insulating rings that are notched at one location along the circumferential direction to form wire passages 12a and 12b and are formed discontinuously. . The guides 10a and 10b are fixed to a predetermined position in the X-axis direction of the outer periphery of the core body 4 made of ferrite or the like with an adhesive or the like, and the outer periphery of the core body 4 positioned between the guides 10a and 10b. Becomes a space for winding the wire to form the coil portion 20.

  The guides 10a and 10b are fixed to the outer periphery of the core body 4 so that the passages 12a and 12b have the same circumferential position. The wire 22 forming the coil unit 20 shown in FIGS. 1 to 4 is not particularly limited, and for example, a litz wire, a USTC wire, a urethane wire, or the like is used. In particular, the use of a stranded wire such as a litz wire improves Q characteristics at high frequencies and is particularly preferable as a coil device for an electronic pen.

  The end portion of the first lead 22a of the wire 22 is connected to a locking groove 32a between the claw portions 34a, 34a of the first terminal 30a shown in FIG. Further, the end portion of the second lead 22b of the wire is connected to the locking groove 32b between the claw portions 34b and 34b of the second terminal 30b. The distance between the locking groove 32a and the locking groove 32b between the claw portions 34a and 34b farthest from each other is preferably equal to or less than the circumferential width of the first passage 12a in the first wire guide 10a. .

  As shown in FIGS. 1-4, in this embodiment, the wire 22 in which the end portion of the first lead 22a at the beginning of winding is fixed to the locking groove 32a between the claw portions 34a passes through the first wire passage 12a. The coil part 20 is formed by being wound around the outer periphery of the core body 4 positioned between the first wire guide 10a and the second wire guide 10b. After the coil portion 20 is formed, the wire 22 passes through the second passage 12b and is extended to the tip end 4c side from the one end and the second wire guide 10b. After winding the outer periphery of the core body 4 about one turn or more, again, It returns to the coil unit 20 side through the second wire passage 12b. The second lead 22b, which is the winding end of the wire 22, is connected to the second locking groove 32b of the second terminal from the second passage 12b through the first passage 12a.

  In the illustrated example, the lead portion 22b of the wire 22 is returned from the second passage 12b to the first passage 12a in a straight line, but the coil portion 20 positioned between the guides 10a and 10b is wound once or more. After turning, the lead portion 22b of the wire 22 may be connected to the second terminal 30b through the first passage 12a.

  In the electronic pen coil device 2 according to this embodiment, in order to form the coil portion 20 by winding the wire 22 around the outer periphery of the core body 4, it is preferable to fix the housing 70 to the core body 4. First, the end of the first lead 22 a of the wire 22 is inserted and connected to the locking groove 32 a between the claw portions 34 a of the first terminal 30 a mounted on the housing 70. Next, the wire 22 is wound around the outer periphery of the core body 4 located between the first wire guide 10a and the second wire guide 10b through the first wire passage 12a of the first wire guide 10a to form a coil. Part 20 is formed.

  When winding the wire 22, the length in the axial direction around which the wire 22 is wound is determined by a predetermined length partitioned by the two wire guides 10 a and 10 b, and the wire 22 is easily wound automatically. The positioning accuracy of the wire 22 is improved, and predetermined inductance, Q characteristics, frequency characteristics, and the like can be realized with high accuracy, and the position detection accuracy by the electronic pen is also improved. Moreover, since the wire 22 is caught by the 1st wire guide 10a because the 1st lead | read | reed 22a of the wire 22 passes the 1st channel | path 12a, it is easy to wind the wire 22 around the outer periphery of the core body 4 automatically.

  Further, after the coil portion 20 is formed by winding the coil body 20 around the outer periphery of the core body 4 located between the first wire guide 10a and the second wire guide 10b, the wire 22 is passed through the second passage 12b. The wire 22 is locked to the second wire guide 10b by, for example, returning to the second passage 12b after winding about one round and then returning to the second passage 12b. The second lead 22b of the wire 22 is returned from the second passage 12b to the locking groove 32b between the claw portions 34b of the second terminal 30b through the first passage 12a on the outer periphery of the coil portion 20 and connected to the second terminal 30b. Easy to do. That is, even if the outer diameter of the core body 4 is reduced, the automatic winding operation of the wire 22 becomes extremely easy.

  Simultaneously with the end of the winding, both ends of the wire 22 can be connected to the first terminal 30a and the second terminal 30b. In addition, since the connection pieces 44 a and 44 b for connecting to the pair of terminal electrodes 52 and 54 of the pressure sensitive element 50 are integrally formed on these terminals 30 a and 30 b, No special wiring is required, and the wiring between the coil portion 20 and the pressure-sensitive element 50 is simplified. In this respect as well, the pen diameter can be reduced.

  In the present embodiment, the locking grooves 32a and 32b of the terminals 30a and 30b are narrower from the entrance toward the bottom, and the ends of the leads 22a and 22b of the wire 22 are directed from the entrance to the bottom. The wire end is fixed to each terminal only by inserting. Also in this respect, the automatic wire winding operation is easy.

  Furthermore, in the present embodiment, the first passage 12 a and the second passage 12 b are formed at the same position in the circumferential direction of the core body 4. Because of this structure, when returning the second lead 22b that is the winding end of the wire 22 on the coil part 20 after winding through the first passage 12b from the second passage 12b, the wire 22b is straightened. It only needs to be moved upward, and the operation is easy.

  In the present embodiment, the positions of the first locking groove 32a and the second locking groove 32b along the circumferential direction of the core body 4 substantially coincide with the circumferential position of the first passage 12a. Because of such a structure, when the first lead 22a of the wire 22 is pulled out from the first locking groove 32a toward the first passage 12a, the wire 22 extends from the first passage 12a toward the second locking groove 32b. When the second lead 22b is pulled out, it is only necessary to move the wire 22 on a substantially straight line, so that the automatic winding operation of the wire 22 is further facilitated.

  Moreover, in the present embodiment, the first board connection claw 38a and the second board connection claw 38b are formed integrally with the first terminal base 36a and the second terminal base 36b, respectively, and are connected to the circuit board 100, respectively. is there. For this reason, the connection between the coil unit 20 and the pressure sensitive element 50 and the circuit board 100 is facilitated, the connection with the capacitor provided on the circuit board 100 is facilitated, and the resonance circuit used for detecting the position of the electronic pen, etc. Formation is also easy. Further, wiring other than the first terminal 30a and the second terminal 30b is not necessary, and this also contributes to the miniaturization of the electronic pen.

  In the present embodiment, the core body 4 is formed with an axial hole 4a penetrating in the axial direction, and the core body 6 is attached to the axial hole 4a for axial movement. As shown in FIG. The end of the core body 6 on the 4b side is detachably attached to the core body base end mounting hole 62 of the pressing member 60. Therefore, the pressing pin 52 of the pressing member 60 shown in FIG. 2 is connected to the pressure sensitive element 50 in accordance with the pressure acting on the pen tip 6a provided at the tip of the core body 6 protruding from the tip 4c shown in FIG. The first element electrode surface 52 is pressed. As a result, the writing pressure applied to the pen tip 6a (see FIG. 1) can be transmitted to the pressure sensitive element 50 with high accuracy.

  Further, by adopting such a configuration, in this embodiment, the core body 6 provided with the pen tip 6a can be configured to be detachable with respect to the pressing member 60. Exchange becomes easy.

  Furthermore, in the present embodiment, after the wire 22 is wound around the core body 4 and the lead portions 22a and 22b of the wire 22 are connected to the first terminal 30a and the second terminal 30b, the pressure-sensitive element 50 is connected to the housing 70. It is possible to insert from the element insertion hole 78 in the axial direction and the vertical direction. Therefore, even when solder or laser is used when connecting the end portions of the lead portions 22a and 22b of the wire 22 to the first terminal 30a and the second terminal 30b, the heat is not transferred to the pressure-sensitive element 50, Problems due to heat of the element 50 can be prevented.

  In the present embodiment, since the first terminal 30a and the second terminal 30b are configured to be separated from the base end 4b of the core body 4, the coil is formed by arranging the terminals 30a and 30b in contact with the core body 4. A decrease in the Q value of 20 can be effectively prevented.

  Further, in the present embodiment, as shown in FIG. 7, the first element connection piece 44 a and the second element connection piece 44 b can be inserted from the element insertion hole 78 separately from or together with the element 50. . With this configuration, the terminals 30a and 30b on which the element connection pieces 44a and 44b are formed can be easily attached to the housing 70. Moreover, by inserting the first and second element connection pieces 44a and 44b from the element insertion hole 78, the first and second element connection pieces 44a and 44b are positioned with respect to each other. In between, it becomes easy to insert the pressure-sensitive element 50 from the element insertion hole 78.

  Further, in this embodiment, the housing 70 is formed with injection holes 73a and 73b for injecting adhesive from a direction substantially perpendicular to the direction in which the pressure sensitive element 50 is inserted from the element insertion hole 78 shown in FIG. is there. Through the injection holes 73a and 73b, an adhesive can be injected into the connecting portion between the first element connecting piece 44a and the pressure sensitive element 50 and the connecting portion between the second element connecting piece 44b and the pressure sensitive element 50. The adhesive is not particularly limited, but is preferably a conductive adhesive.

  When these injection holes 73a and 73b are not provided, the pressure sensitive element 54 may be mounted in the housing after the adhesive is injected from the element insertion hole 78. Compared to that case, in the present embodiment, since the adhesive is injected from the injection holes 73a and 73b, it is possible to inject the adhesive after the pressure sensitive element 54 is mounted in the housing 70. It becomes easy to connect and fix the element connecting pieces 44a and 44b and the pressure sensitive element 50 with the minimum necessary adhesive. The element connection pieces 44a and 44b and the pressure sensitive element 50 are preferably connected directly, but may be connected via a conductive rubber or the like.

  Further, in the present embodiment, the first terminal 30a is formed with a first claw portion 34a to which the first lead portion 22a of the wire 22 wound around the core body 4 is connected, and the second terminal 30b has A second claw portion 34b to which the second lead portion 22b of the wire 22 is connected is formed. Moreover, the first claw part 34 a and the second claw part b protrude from the outer periphery of the housing 70. With this configuration, the electrical connection between the wire 22 wound around the core body 4 and the pressure-sensitive element 50 and the electrical connection between the pressure-sensitive element 50 and the circuit board 100 are facilitated.

  Moreover, in the present embodiment, the first claw portion 34a is formed on the first element connection piece 44a, and the second claw portion 34b is formed on the second element connection piece 44b. In addition, projecting holes 76a and 76b through which the claw portions 34a and 34b penetrate and are exposed to the outside are formed on the outer peripheral surface of the housing 70 positioned on the opposite side of the element insertion hole 78.

  With this configuration, when the first and second element connection pieces 44a and 44b are inserted from the element insertion holes 78 of the housing 70 and the terminals 30a and 30b are attached to the housing 70, the connection pieces 44a and 44b are formed. The claw portions 34a and 34b are exposed to the outside through the protruding holes 76a and 76b on the outer peripheral surface of the housing 70 located on the opposite side of the element insertion hole 78. In this case, the protrusion holes 76a and 76b position the first and second element connecting pieces 44a and 44b, and it is easy to keep the distance between them along the axial direction constant.

Second Embodiment As shown in FIGS. 8 to 10, in the coil device 2a according to this embodiment, the configurations of the casing 70a, the first terminal 30c, and the second terminal 30d are different from those shown in FIGS. This is the same as the embodiment shown, and a description of common parts is omitted.

  As shown in FIGS. 9 and 10, in this embodiment, the first claw portion 34a, which is an example of the first wire connection portion, is formed integrally with the first terminal base 36a separately from the first element connection piece 44c. The protruding piece 35a is formed at the upper end in the Z-axis direction. In addition, the second claw portion 34b, which is an example of the second wire connection portion, is formed at the upper end in the Z-axis direction of the protruding piece 35a formed integrally with the first terminal base 36a separately from the second element connection piece 44d. It is.

  The first protruding piece 35a is formed in the middle of the first terminal base 36a located between the first element connecting piece 44a and the second substrate connecting claw 38a, and the second protruding piece 35b is connected to the second element connecting piece 38a. It is formed in the middle of the second terminal base 36a located between the piece 44b and the second substrate connection claw 38b. These protruding pieces 35a and 35b are formed to face the Y-axis direction at the same position in the X-axis direction. As shown in FIG. 10, each of the protruding pieces 35a and 35b is formed on the lower flat surface 77 of the casing 70a at a position away from the element insertion hole 78 in the X-axis direction toward the substrate side. The second through holes 79a and 79b can be inserted.

  The first claw portion 34a and the second claw portion 34b respectively formed on the upper portions of the protruding pieces 35a and 35b are shown in FIG. 9 at the same positions as the through holes 79a and 79b in the X-axis direction and the Y-axis direction. The first and second projecting holes 76c and 76d formed in the upper flat surface 75 are projected to the outside.

  With this configuration, it becomes easy to separate the element connecting pieces 44c and 44d from the claw portions 34a and 34b for the wire connecting portions, and the pressure sensitive element 50 is temporarily attached to the element connecting pieces 44c and 44d. Even if the lead portions 22a and 22b of the wire 22 are connected to the claw portions 34a and 34b of the wire connecting portion later, the heat at the time of connection becomes difficult to be transmitted to the pressure sensitive element 50. In the embodiment shown in FIGS. 8 to 10, other configurations and operational effects are the same as those of the above-described embodiment.

Third Embodiment As shown in FIG. 11, the coil device according to this embodiment is the same as the embodiment shown in FIG. 1 to FIG. 7 or FIG. 8 to FIG. 10 except that the configuration of the core body 4 is different. Description of common parts is omitted.
In the present embodiment, as shown in FIG. 11A, the first passage 12c formed in the first wire guide 10c and the second passage 12d formed in the second wire guide 10d are part of the circumferential direction of the ring. Is not cut out completely, leaving the groove bottom 13 and cut out. The groove depths of the concave grooves for forming these passages 12c and 12d are considered to be shallower than the groove depths of the passages 12a and 12b in the above-described embodiment. No problem. In the embodiment shown in FIG. 11A, other configurations and operational effects are the same as those of the above-described embodiment, and other descriptions are omitted.

  Further, in the embodiment shown in FIG. 11B, two or more first wire passages 12e1 and 12e2 are formed along the circumferential direction of the first wire guide 10e. In addition, two or more second wire passages 12f1 and 12f2 are formed along the circumferential direction of the second wire guide 10f. In this embodiment, there are two or more second passages 12f1 and 12f2 along the circumferential direction of the second wire guide 10f.

  For this reason, the wire (not shown) that has come out of the second wire guide 10f through one second passage 12f1 can be returned to the direction of the second terminal (not shown) through another second passage 12f2. Therefore, the wire is locked to the second wire guide 10f by winding the wire at least about 1/8 around the outer periphery of the core body 4 located between the second wire guide 10f and the tip 4b. Can do.

  In the above-described embodiment, the second passage 12b is single along the circumferential direction of the second wire guide 10b. Therefore, the wires that have passed through the second passage 12b to the outside of the second wire guide 10b are the same. It is necessary to return to the direction of the second terminal 30b through the two passages 12b. In that case, the wire 22 is locked to the second wire guide 10b by winding the wire around the outer periphery of the core body 4 positioned between the second wire guide 10b and the tip 4b by about one turn or more. Can be made.

  In the embodiment shown in FIG. 11 (B), a wire (not shown) that goes out of the second wire guide 10f through one second passage 12f1 is connected to a second terminal (not shown) through another second passage 12f2. You can return to the direction. Therefore, the wire is locked to the second wire guide 10f by winding the wire at least about 1/8 around the outer periphery of the core body 4 located between the second wire guide 10f and the tip 4b. Can do. In the embodiment shown in FIG. 11B, other configurations and operational effects are the same as those of the above-described embodiment.

Fourth Embodiment As shown in FIG. 12, the coil device of the present embodiment is the same as the embodiment shown in FIG. 1 to FIG. 7 or FIG. 8 to FIG. 10 except that the configuration of the core body 4 is different. Description of common parts is omitted. In this embodiment, the 1st wire guide 10a and the 2nd wire guide 10b are integrally molded with the core body 4 comprised by the ferrite core etc.

  As a method for integrally molding, in addition to insert molding, magnetic field injection molding (CIM) or the like may be used. In the case of insert molding, it is easy to configure at least one of the first guide wire and the second wire guide and the core body from different materials. On the other hand, in the case of magnetic field injection molding, at least one of the first guide wire and the second wire guide and the core body can be made of a magnetic material. In any case, in this embodiment, the distance in the X-axis direction between the first wire guide 10a and the second guide wire 10b can be easily kept constant. In the embodiment shown in FIG. 12, other configurations and operational effects are the same as those of the above-described embodiment.

Fifth Embodiment As shown in FIG. 13, the coil device of the present embodiment is the same as the embodiment shown in FIG. 1 to FIG. 7 or FIG. 8 to FIG. 10 except that the configuration of the core body 4 is different. Description of common parts is omitted. In the present embodiment, a part in the circumferential direction of the first wire guide 10a and a part in the circumferential direction of the second wire guide 10b are connected to the outer peripheral surface of the core body 4 by a connecting piece 19 extending in the X-axis direction. is there. In this example, the connecting piece 19 extends linearly along the X-axis direction. However, the connecting piece 19 does not necessarily have to be linear, and may have a spiral shape or other shapes, and the circumference of the first wire guide 10a. What is necessary is just to connect a part of direction and a part of the circumferential direction of the 2nd wire guide 10b to a X-axis direction.

  The thickness of the connecting piece 19 is thinner than the radial thickness of the guides 10a and 10b. The wire 22 of the above-described embodiment is wound around the outer periphery of the core body 4 and the outer periphery of the connecting piece 19 that are not covered with the connecting piece 19 to constitute the coil unit 20. Since the wire 22 is wound around the outer periphery of the connecting piece 19, it is preferable that the outer periphery of the coil portion 20 does not exceed the radial thickness of the first wire guide 10a and the second wire guide 10b.

  In the present embodiment, by connecting the first wire guide 10a and the second wire guide 10b with the connecting piece 19, it is easy to keep the distance in the X-axis direction between the first wire guide 10a and the second guide wire 10b constant. . In the embodiment shown in FIG. 13, other configurations and operational effects are the same as those of the above-described embodiment.

Sixth Embodiment As shown in FIGS. 14 and 15, the coil device of this embodiment is the same as the embodiment shown in FIG. 1 to FIG. 7 or FIG. 8 to FIG. 10 except that the configuration of the core body 4 is different. Therefore, description of common parts is omitted. In the present embodiment, the fitting groove is formed on the outer peripheral surface of the core body 4 at a depth of 50% or less, preferably equal to or less than the thickness of the connecting piece 19 along the shape in which the connecting piece 19 extends in the X-axis direction. 4d is formed.

  The fitting groove 4d is preferably formed in a straight line over the entire length along the X-axis direction of the core body 4. This is because the connecting piece 19 and the guides 10a and 10b can be easily attached to the outer periphery of the core body 4 from the X-axis direction. When the connecting piece 19 and the guides 10a and 10b are integrally formed with the core body 4 by insert molding or the like, the connecting piece 19 does not necessarily have to be linear, and the fitting groove 4d is not straight. May be.

  Further, the fitting groove 4d need not be formed over the entire length of the core body 4, and may be formed only at a position where the connecting piece 19 is present. In the embodiment shown in FIGS. 14 and 15, other configurations and operational effects are the same as those of the above-described embodiment.

Seventh Embodiment As shown in FIG. 16, the coil device of the present embodiment is the same as the embodiment shown in FIG. 1 to FIG. 7 or FIG. 8 to FIG. 10 except that the configuration of the core body 4 is different. Description of common parts is omitted. The present embodiment is different in that the first wire guide 10g also serves as a wire holding portion, and the following points are different. That is, in the present embodiment, the third wire guide 10i is disposed between the first wire guide 10g and the second wire guide 10h. The third wire guide 10i protrudes radially outward from the outer peripheral surface of the core body 4 and has at least one concave third wire passage 12i along the circumferential direction.

  In the present embodiment, the third wire guide 10i is disposed closer to the second wire guide 10h than the first wire guide 10g. The third wire passage 12i formed in the third wire guide 10i includes a first wire passage 12g formed in the first wire guide 10g, and a second wire passage 12h formed in the second wire guide 10h. Are formed at the same position in the circumferential direction.

  In the present embodiment, the outer peripheral cover 15 constituting the first wire guide 10g is formed in a cylindrical shape (in this example, a cylindrical shape) so as to cover the outer peripheral portion on the proximal end side of the core body 4, and in the circumferential direction thereof In part, an axial notch 16 is formed in the X-axis direction continuously to the first passage 12g at the same circumferential position as the first passage 12g. In the notch 16, the outer peripheral surface of the core body 4 is formed. Is exposed.

  Further, the outer peripheral cover 15 is formed with a radially outward convex portion 15 a and a spacer convex portion 17. At the axial X position where the spacer convex portion 17 is formed, the convex portion 17 and the convex portion 17 are formed. The part 15a is connected via a bottom thin part, and a first holding groove 32c and a second holding groove 32d as wire holding parts are formed between the convex part 17 and the convex part 15a.

  The projecting heights of the convex portions 17 and 15a are approximately the same as the projecting heights of the ring-shaped guides 10i and 10h. In the present embodiment, since the coil portion 20b having double turns or more is formed between the ring-shaped guides 10i and 10h, the radial protruding heights of the ring-shaped guides 10i and 10h are the other embodiments. It is formed higher than that of the wire guide. This is because the radial protrusion heights of the ring-shaped guides 10i and 10h are preferably set higher than the outer diameter of the coil portion 20b.

  In the present embodiment, after fixing the first lead 22a, which is the start of winding, with the holding groove 32c, the wire 22 is positioned between the first wire guide 10g and the third wire guide 10i through the first wire passage 12g. The coil part 20a is formed by being wound around the outer periphery of the core body 4 in a coil shape. The wire 22 after forming the coil portion 20a is passed between the third wire guide 10i and the second wire guide 10h through the third passage 12i, where it is first wound in a single winding, Through the two passages 12h, the second wire guide 10h is once taken out to the tip 4b side. After that, after winding the outer periphery of the core body 4 about one or more times, it is returned again between the guide 10h and the guide 10i through the second wire passage 12h, and is wound again to be a double-winding coil portion. 20b is formed.

  After that, the second lead 22b, which is the winding end of the wire 22, is directed to the first passage 12g through the third wire passage 12i, and is inserted into the second holding groove 32d and fixed there.

  In this embodiment, coil part 20a, 20b comprises the coil part 20 as a whole. The wires 22 are more than doubled on the outer periphery of the core body 4 located between the third wire guide 10i and the second wire guide 10h or between the third wire guide 10i and the first wire guide 10g. It can wind and can adjust the inductance as the whole coil apparatus. Of course, a total of four or more wire guides may be provided, and any two or more wire guides may be integrated in the axial direction.

  In the present embodiment, since the first wire guide 10g has the holding grooves 32c and 32d as the wire holding portions, before attaching the housings 70 and 70a according to the above-described embodiment to the base end 4b of the core body 4, The coil portion 20 can be formed on the core body 4. Such a first wire guide 10g may be used instead of the first wire guide 10a of the above-described embodiment. In the embodiment shown in FIG. 16, other configurations and operational effects are the same as those of the above-described embodiment.

Eighth Embodiment As shown in FIG. 17, the coil device of the present embodiment is the same as the embodiment shown in FIG. 16 in that the first wire guide 10g also serves as a wire holding portion. Is different. That is, in the present embodiment, the third wire guide 10o is not disposed between the first wire guide 10g and the second wire guide 10h.

  Moreover, in this embodiment, the coil part 20 is not divided | segmented along the axial direction. In the present embodiment, first, after fixing the first lead 22a of the wire 22 and the first lead 22a, which is the beginning of winding, with the first holding groove 32c, the wire 22 is connected to the first wire passage 12g of the first wire guide 10g. Through, it is made to go straight to the 2nd channel 12h, without forming a coil part. After that, the wire 22 is taken out to the outside (the tip 4c side) of the second wire guide 10h through the second passage 12h, and, for example, is wound approximately once and then returned to the second passage 12h. The coil portion 20 is formed by winding a wire in the shape of a coil around the outer periphery of the core body 4 positioned between the second wire guide 10h and the first wire guide 10g. . Thereafter, the second lead portion 22b of the wire 22 is fitted and fixed to the second holding groove 32d through the first passage 12g.

  In the present embodiment, since the linear lead portion 22a is hidden under the coil portion 20, it is possible to reduce the possibility that the lead portion is detached by an external force as compared with the case where the lead portion passes over the coil portion 20. it can. In the embodiment shown in FIG. 17, other configurations and operational effects are the same as those of the above-described embodiment.

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

  For example, the protrusion height from the outer peripheral surface of the core body 4 in the guides 10 a to 10 i is preferably about 1.5 to 2.5 times the wire diameter of the wire 22. This is to prevent the outer periphery of the coil portion 20 from exceeding the maximum diameter of the wire guides 10a to 10i. The outer periphery of the guides 10a to 10i may be configured to contact the inner peripheral surface of the outer casing of the electronic pen, which contributes to the reduction of the outer diameter of the electronic pen. The core body may have a cylindrical shape other than a cylinder, or may have no axial hole, or may have a column shape other than a column.

  A coil device in which the core body 4 does not have the shaft hole 4a is used in, for example, an electronic pen of a type that detects the position by changing the inductance instead of the capacitance of the capacitor.

  The first element connection pieces 44a and 44c of the first terminals 30a and 30c and the second element connection pieces 44b and 44d of the second terminals 30b and 30d may be integrally formed with the housing by insert molding or the like. In that case, the accuracy of the interval between these element connection pieces is improved. When the first element connection pieces 44a and 44c of the first terminals 30a and 30c and the second element connection pieces 44b and 44d of the second terminals 30b and 30d are formed integrally with the housing 70, the claw portions 34a and 34b are formed. The positional relationship between the element connection pieces 44a and 44b is not particularly limited.

  Furthermore, in embodiment mentioned above, although the wire connection part is comprised by a pair of nail | claw part 34a, 34b in which the locking grooves 32a and 32b were formed in between, this invention is not limited to this, Other The shape of the connecting portion may be used. In the above-described embodiment, the board connection portion is configured by the connection claws 38a and 38b. However, other connection structures may be used. For example, the wire connection portion may not have a groove shape, but may have a convex shape in which the first lead 22a and the second lead 22b are entangled and fixed. Similarly to the wire connecting portion, the wire holding portion made of an insulating material is not limited to the groove shape.

  Moreover, in embodiment mentioned above, although the wire part 22 is wound around the outer periphery of the core body 4 using the wire guides 10a-10i, and a coil part is formed, in this invention, means other than wire guides 10a-10i are used. The coil portion 20 may be formed by winding the wire 22 around the outer periphery of the core body 4. For example, the winding operation may be performed by fixing the winding start and winding end of the wire with an adhesive. However, the wire guides 10a to 10i may be formed on the outer periphery of the core body 4 in order to improve the inductance, Q characteristics, and high frequency characteristics of the coil part 20 by accurately controlling the number of turns and the position of the coil part. preferable.

2 ... Coil device for electronic pen 4 ... Core body 4a ... Shaft hole 4b ... Base end (first core end)
4c ... Tip (second core end)
6 ... Core 6a ... Pen tips 10a, 10c, 10e, 10g ... First wire guides 10b, 10d, 10f, 10h ... Second wire guide 10i ... Third wire guides 12a, 12c, 12e1, 12e2, 12g ... First Passage 12b, 12d, 12f1, 12f2, 12h ... second passage 12i ... third passage 15 ... outer peripheral cover 15a ... radially outward projection 16 ... axial notch 17 ... spacer projection 20, 20a, 20b ... coil Portion 22 ... Wire 22a ... First lead (first end)
22b ... Second lead (second end)
30a ... 1st terminal 30b ... 2nd terminal 32a ... 1st locking groove 32b ... 2nd locking groove 34a ... 1st nail | claw part 34b ... 2nd nail | claw part 35a ... 1st protrusion piece 35b ... 2nd protrusion piece 36a ... First terminal base 36b ... Second terminal base 38a ... First board connection claw 38b ... Second board connection claw 40a ... First connection piece 40b ... Second connection piece 44a, 44c ... First element connection piece 44b, 44d ... First Two-element connecting piece 46 ... Pressing pin mounting hole 50 ... Pressure sensitive element 52 ... First element electrode surface 54 ... Second element electrode surface 60 ... Pressing member 62 ... Pen proximal end mounting hole 64 ... Pressing pin 66 ... Large diameter portion 70 ... Housing 72 ... Board mounting base 74 ... Board mounting pin 75 ... Flat surfaces 76a, 76c ... First projection holes 76b, 76d ... Second projection holes 77 ... Flat surface 78 ... Element insertion holes 79a ... First through holes 79b ... 2nd through-hole 80 ... element connection piece holding part 82 ... cover part 84 ... core connection piece 86 ... notch part 88 ... accommodation inner peripheral surface 100 ... circuit board 102 ... board attachment holes 104a, 104b ... connection hole 106 ... circuit element

Claims (8)

Arranged inside the electronic pen and spaced apart from the first core end of the core body having a first core end and a second core end respectively positioned on opposite sides in the axial direction along the axial direction A first terminal and a second terminal,
A pressure-sensitive element holding device for an electronic pen, comprising: a housing having a cover portion that covers the circumference of the pressure-sensitive element held by the first terminal and the second terminal with a half or more of the entire circumference. ,

The first terminal is
A first terminal base extending in the axial direction;
A first element connection formed integrally with the first terminal base and connected from the axial direction to a first surface of a pressure sensitive element disposed at a predetermined distance in the axial direction with respect to the first core end. And having a piece,

The second terminal is
A second terminal base insulated from the first terminal base and extending substantially in parallel;
A second element connection piece formed integrally with the second terminal base and connected from the axial direction to a second surface opposite to the first surface of the pressure sensitive element;

The housing is integrally formed with a core connection piece extending in the axial direction from the cover portion in the direction of the core body, and the core connection piece is fixed to the outer periphery of the first core end of the core body. And
The pressure-sensitive element holding device for an electronic pen is characterized in that an element insertion hole for inserting the pressure-sensitive element from a direction substantially perpendicular to the axial direction is formed in the cover portion.   The pressure-sensitive element holding device for an electronic pen according to claim 1, wherein the first element connection piece and the second element connection piece are insertable from the element insertion hole. The housing has an injection hole for injecting an adhesive from a direction substantially perpendicular to the direction in which the pressure sensitive element is inserted from the element insertion hole,
The adhesive can be injected into the connecting portion between the first element connecting piece and the pressure sensitive element or the connecting portion between the second element connecting piece and the pressure sensitive element through the injection hole. 3. A pressure-sensitive element holding device for an electronic pen according to 1 or 2. The first terminal has a first wire connection portion to which a first end of a wire wound around the core body is connected,
The second terminal has a second wire connection portion to which the second end of the wire is connected,
The pressure-sensitive element holding device for an electronic pen according to any one of claims 1 to 3, wherein the first wire connecting portion and the second wire connecting portion protrude from an outer periphery of the housing. The first wire connecting portion is formed on the first element connecting piece;
The pressure-sensitive element holding device for an electronic pen according to claim 4, wherein the second wire connection portion is formed on the second element connection piece. The first wire connecting portion is formed integrally with the first terminal base separately from the first element connecting piece,
The pressure-sensitive element holding device for an electronic pen according to claim 4, wherein the second wire connection portion is formed integrally with the second terminal base separately from the second element connection piece. A first substrate connection portion is formed on the opposite side of the first element connection piece along the axial direction of the first terminal base;
A second substrate connection portion is formed on the side opposite to the second element connection piece along the axial direction of the second terminal base;
The pressure-sensitive element holding device for an electronic pen according to any one of claims 1 to 6, wherein the first substrate connecting portion and the second substrate connecting portion are respectively connected to one end in the axial direction of the circuit board. The cover part is formed integrally with the board mounting base,
The pressure-sensitive element holding device for an electronic pen according to any one of claims 1 to 7, wherein a board mounting pin for positioning and mounting an end portion of the circuit board is integrally formed on the board mounting base.

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