JP5209345B2 - Vibration generator, image engraving device, and spring of vibration generator - Google Patents

Description

  The present invention relates to a vibration generating device, an image engraving device, and a spring of the vibration generating device that are used for engraving a plate to be engraved by relative movement of an engraving needle and a plate to be engraved.

  2. Description of the Related Art Conventionally, an image engraving apparatus used for engraving a booklet-like engraving medium such as a passport or an engraving medium such as a sheet or card made of paper to prevent forgery or add aesthetic value is known. (For example, Patent Document 1).

  Such an image engraving apparatus performs fine engraving with an engraving needle that vibrates based on an image signal obtained by converting image data into an electrical signal, and generates an image such as a photograph or a figure on a medium.

In the vibration generating device that vibrates the engraving needle, a coil spring or the like is used as an elastic body, and the elastic body cannot cope with minute vibrations, which has caused a limit to accurate fine engraving.
JP 2002-86993 A

  The problem to be solved is that a vibration generator that vibrates the engraving needle uses a coil spring or the like as an elastic body, and cannot cope with fine vibrations, which limits the precision of fine engravings. It is a point.

  In the present invention, in order to be able to accurately cope with minute vibrations, the pole part on the electromagnet side or the permanent magnet side has a gap between the opposing pole parts on the permanent magnet side or the electromagnet side supported on the fixed side. A cross-sectional water droplet shape that is arranged and floating-supports the electromagnet side or permanent magnet side with a spring with respect to the permanent magnet side or electromagnet side, and has a pointed portion on one side and an arc-shaped portion on the other side. The pointed end side of the spring is supported on the permanent magnet side or the electromagnet side, and the arcuate portion side of the spring supports the electromagnet side or the permanent magnet side, and the electromagnet or permanent magnet side The main feature of the vibration generator is to vibrate the electromagnet side or the permanent magnet side by switching the energization to the forward and reverse.

  The main feature of the image engraving apparatus is to energize the coil based on engraving signals and engrave the medium to be engraved with the engraving needle interlocked with the electromagnet.

  The most important feature of the spring of the vibration generator is that it is bent and formed into a cross-sectional water droplet shape having a pointed portion on one side and an arc-shaped portion on the other side.

  In the vibration generator of the present invention, the pole part on the electromagnet side or the permanent magnet side is a gap between the opposing pole parts on the permanent magnet side or the electromagnet side supported on the fixed side in order to be able to accurately cope with minute vibrations. The electromagnet side or the permanent magnet side is floatingly supported by a spring with respect to the permanent magnet side or the electromagnet side, the spring is provided with a pointed portion on one side and an arc-shaped portion on the other side. The spring is pointed and formed into a water droplet shape, the tip end side of the spring is supported on the permanent magnet side or the electromagnet side, and the arcuate portion side of the spring supports the electromagnet side or the permanent magnet side, and the electromagnet Alternatively, the electromagnet side or the permanent magnet side is vibrated by switching the energization to the permanent magnet side between forward and reverse.

  For this reason, the spring can cope with minute vibrations and can output minute vibrations.

  The energization of the coil is switched based on the engraving signal, and the medium to be engraved is engraved by the engraving needle linked to the electromagnet side.

  For this reason, accurate fine engraving and the like are possible.

  It was bent and formed into a cross-sectional water droplet shape having a pointed portion on one side and an arc-shaped portion on the other side.

  For this reason, it becomes possible to accurately cope with minute vibrations.

  The objective of accurately responding to minute vibrations was realized with a spring with a water droplet cross section.

  FIG. 1 is a schematic perspective view showing an appearance of an image engraving apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing a main part of the image engraving apparatus.

  As shown in FIGS. 1 and 2, the image engraving apparatus 1 has an apparatus main body 3 in which a control device and the like are stored, and an X-axis table (engraving table) 5 and a Y-axis table (see FIG. Not shown) and a Z drive mechanism.

  The X-axis table (engraving table) 5 places the medium to be engraved on and fixes it to reciprocate in the X-axis direction (lateral direction). A Y-axis table (not shown) reciprocates the engraving table 5 in the Y-axis direction orthogonal to the X-axis direction. The Z-axis mechanism includes an engraving head 7 and the like, and moves the engraving head 7 in the vertical direction.

  The engraving head 7 has an engraving needle, vibrates the engraving needle based on an input image signal (engraving signal), and engraves an image on the medium to be engraved.

  The engraving head 7 can be moved up and down by a driving mechanism such as a stepping motor, a timing belt, and a ball screw provided in the Z-axis drive unit 9 disposed behind the engraving head 7 and is disposed below the Y The Y-axis table driven by the shaft drive unit 11 can move in the front-rear direction.

An X-axis drive device 13 is disposed in front of the engraving head 7. The X-axis drive device 13 includes a reciprocating mechanism (X-axis driving unit) 15 and a sculpture table 17 mounted on the mechanism 15 and reciprocating (moving) in the lateral direction (X-axis direction). Has been. this
1204275244687_0
In the figure, a booklet-shaped engraving medium 19 such as a passport is held and fixed on the engraving table 17.

  The engraving head 7 is provided with a vibration generator 21 as shown in FIGS. FIG. 3 is a front view in which a part of the vibration generator is omitted, and FIG. 4 is a plan view thereof.

  As shown in FIGS. 3 and 4, the vibration generator 21 is mainly configured such that the electromagnet side 25 is floatingly supported by a spring 27 with respect to the permanent magnet side 23.

  5A and 5B relate to a permanent magnet. FIG. 5A is a plan view and FIG. 5B is a partially omitted front view.

  As shown in FIGS. 3 to 5, the permanent magnet side 23 includes a magnet block 29 and a yoke 31. The magnet block 29 is formed in a rectangular parallelepiped shape, and three are stacked vertically. The yoke 31 is formed by laminating a plurality of yoke plates 33 in the horizontal direction. One end of each of the upper part 35 and the lower part 37 is coupled to the upper and lower parts of the magnet block 29, and the permanent magnets are opposed to the upper and lower parts of the other end. Two pairs of the pole portions 35a and 37b on the side 23 are provided.

  The permanent magnet side 23 is provided with a coil housing space 41 in the central portion of the yoke 31 for housing the electromagnet side 25 coil 39 side so as to vibrate. In the coil housing space 41, upper and lower portions 41a and 41b are formed in the shape of upper and lower long circular holes, and are formed so as to penetrate in the stacking direction of the yoke plate 33. Two coil portions 35a and 37a facing each other on the permanent magnet side 23 are provided on both sides of the coil housing space 41.

  The permanent magnet side 23 is provided with a pointed support recess 43 that fits and supports the pointed end 27 a side of the spring 27. The shape of the pointed support recess 43 corresponds to the outer shape of the spring 27 on the side of the pointed end 27a, and is configured to fit and support the pointed end 27a without a gap.

  A pair of mounting brackets 45 are attached to the permanent magnet side 23, and a fastening portion 45a of the mounting bracket 45 is fastened and fixed to the base of the engraving head 7 on the fixed side.

  6A is a plan view of the coil, FIG. 6B is a schematic side view thereof, FIG. 7A is a plan view of the mover, and FIG. 6B is a schematic front view thereof.

  As shown in FIGS. 3 to 7, the electromagnet side 25 is obtained by fitting the mover 47 to the coil 39.

  As shown in FIG. 6, the coil 39 is wound around the center fitting hole 49, and the wirings 51 and 53 are connected to the drive circuit on the control unit side.

  As shown in FIG. 7, the mover 47 includes a plurality of mover plates 55 stacked in the same direction as the stacking direction of the yoke plate 33, and both pole portions 47 a on both sides of the center fitting portion 57. , 47b are formed. The fitting portion 57 of the mover 47 is fitted into the fitting hole 49 of the coil 39. Although there is a slight gap between the fitting hole 49 and the fitting portion 57, it is also possible to fix the two with an adhesive or the like.

  Thus, both pole portions 47a and 47b protrude from both sides of the coil 39. The two pole portions 47a and 47b are disposed with a vertical gap between the two pole portions on the permanent magnet side 23, respectively.

  On the mover 47, arcuate surfaces 59 for fitting and supporting the arcuate portion 27 b of the spring 27 are formed at four positions on the both sides of the fitting portion 57.

  A pin support block 63 is attached to the center of the mover in the width direction (upper and lower center in FIG. 7) via a pair of plate-like support arms 61, and the upper end of the support pin 65 is fixed to the pin support block 63. Yes. A needle support block (not shown) to which an engraving needle (not shown) is attached is fixed to the lower end of the support pin 65. The needle support block is supported on the base side of the engraving head 7 by a leaf spring or the like and guided in movement.

  8A and 8B relate to a spring, where FIG. 8A is a front view and FIG. 8B is a side view.

  As shown in FIG. 3, the springs 27 are provided at four locations between the coil housing space 41 on the permanent magnet side 23 and the two pairs of pole portions 35 a and 37 a and both sides of the coil 39 of the mover 47 on the electromagnet side 25. They are arranged symmetrically.

  As shown in FIGS. 3 and 8, the spring 27 is a leaf spring and is formed into a line-symmetric cross-sectional water droplet shape. The spring 27 includes the pointed portion 27a on one side and the arc-shaped portion 27b on the other side. The pointed portion 27a is a butted portion formed by bending a leaf spring. The pointed portion 27a is shaped to fit into the pointed support recess 43 on the permanent magnet side 23 with almost no gap, and the arcuate portion 27b has a curvature to fit into the arcuate surface 59 on the electromagnet side 25 with almost no gap. doing.

  When the spring 27 is interposed between the pointed support recess 43 and the arcuate surface 59, the setting is positioned so that the symmetry line of the spring 27 is inclined 45 °.

  The spring 27 is formed long so that both side portions 27c of the pointed portion 27a protrude from the arcuate portion 27b side. Accordingly, the arcuate portion 27b can be reliably brought into contact with the arcuate surface 59 on the electromagnet side 25 while the apex portion 27a side is securely supported by the apex support recess 43 on the permanent magnet side 23.

  FIG. 9 shows the magnetic poles on the permanent magnet side 23, and FIG. 10 is an explanatory diagram showing the switching of the magnetic poles on the electromagnet side 25.

  As shown in FIG. 9, if the upper part of the magnet block 29 is an N pole and the lower part is an S pole, both pole parts 35a and 37b become an N pole and an S pole, respectively.

  On the other hand, when the energization to the coil 39 is switched between forward and reverse, the two pole portions 47a and 47b are alternately switched to (S pole, N pole) and (N pole, S pole) as shown in FIG. By this switching, when both pole portions 47a and 47b are (S pole, N pole), the pole portion 47a is attracted to the N pole of the pole portion 35a on the permanent magnet side 23 and the pole portion 47b is the pole portion on the permanent magnet side 23. It is attracted to the S pole of 37a. When both pole portions 47a and 47b are switched to (N pole, S pole), the pole portion 47a is attracted to the S pole of the pole portion 37a on the permanent magnet side 23 and the pole portion 47b is N of the pole portion 35a on the permanent magnet side 23. Attracted to the pole.

  Due to the action between the permanent magnet side 23 and the electromagnet side 25, the electromagnet side 25 swings and rotates slightly.

  During this swinging rotation, the spring 27 is bent so as to receive a load from the arcuate surface 59 on the electromagnet side 25 and deform the cross section, and when the load from the arcuate surface 59 is released, the arcuate surface 59 is restored. Energize.

  Therefore, even the small spring 27 can accurately follow the minute swinging rotation on the electromagnet side 25 and bias the minute vibration on the electromagnet side 25.

  In addition, the four springs 27 are arranged in line symmetry 45 and the urging force of the springs 27 can be made to uniformly act on the arc surface 59 in the swinging and rotating direction of the electromagnet side 25. An accurate urging force can be exerted against it.

Such minute vibrations are transmitted to the pin support block 63 and the support pin 65 through the support arm 61, and the energization of the coil 39 is switched based on the engraving signal, so that the image data is converted into an electrical signal. Fine engraving can be performed reliably by vibrating the engraving needle based on the converted signal.
[Effect of Example]
In the image engraving apparatus 1 according to the embodiment of the present invention, the pole portions 47a and 47b on the electromagnet side 25 including the coil 39 and the mover 47 are disposed with a gap between the opposing pole portions 35a and 37a on the permanent magnet side 23. The electromagnet side 25 is floatingly supported by a spring 27 with respect to the permanent magnet side 23, and the spring 27 is bent and formed into a cross-sectional water droplet shape having a pointed portion 27a on one side and an arcuate portion 27b on the other side. The pointed portion 27 a side of the spring 27 is supported by the permanent magnet side 23, and the arcuate portion 27 b side of the spring 27 supports the mover 47 on the electromagnet side 25. The electromagnet side 25 is vibrated by switching the energization between forward and reverse.

  For this reason, even the small spring 27 can accurately follow the minute swinging rotation on the electromagnet side 25 and bias the minute vibration on the electromagnet side 25. Therefore, by switching the energization to the coil 39 based on the engraving signal, the fine engraving can be surely performed by vibrating the engraving needle based on the signal obtained by converting the image data into the electric signal.

  The permanent magnet side 23 is provided with a coil housing space portion 41 for oscillatingly accommodating the coil 39 portion of the electromagnet side 25 in the center portion, and the opposing permanent magnet side 23 on both sides of the coil housing space portion 41. A pair of both pole portions 35a and 37a are provided, and the mover 47 on the electromagnet side 25 is disposed between the pole portions 35a and 37a on the permanent magnet side 23 with both pole portions 47a and 47b protruding on both sides of the coil 39, respectively. It was.

  For this reason, fine engraving can be performed more reliably by switching the energization to the coil 39.

  The springs 27 are arranged symmetrically at four locations between the coil accommodating space 41 and the pair of pole portions 35a, 37a on the permanent magnet side 23 and both sides of the coil 39 of the mover 47 on the electromagnet side 25.

  For this reason, the micro-oscillation on the electromagnet side 25 can be surely micro-vibrated via the urging force uniformly taken by the four springs 27, and the fine engraving can be performed more reliably. .

  The permanent magnet side 23 is provided with a pointed support recess 43 for fitting and supporting the pointed end 27a side of the spring 27, and the armature 47 on the electromagnet side 25 is fitted and supported with the arcuate portion 27b of the spring 27. An arc surface 59 is provided.

For this reason, the electromagnet side 25 is accurately supported by the spring 27, and reliable minute vibration without waste is possible.
[Others]
The arrangement of the permanent magnet side 23 and the electromagnet side 25 is changed, the pole portion of the permanent magnet side 23 is interposed between the pole portions of the electromagnet side 25, and the permanent magnet side 23 is minutely vibrated. It is also possible.

  The shape of the spring 27 can be freely selected as long as the tip 27a and the arcuate portion 27b are formed to have the same length as long as the spring 27 is formed in a water droplet shape in cross section.

It is a schematic perspective view which shows the external appearance of an image engraving apparatus. Example 1 It is a perspective view which shows the principal part of an image engraving apparatus. Example 1 It is the front view which abbreviate | omitted a part of vibration generator. Example 1 It is the top view which abbreviate | omitted a part of vibration generator. Example 1 In connection with the permanent magnet, (a) is a plan view and (b) is a partially omitted front view. Example 1 (A) is a top view of a coil, (b) is the schematic side view. Example 1 (A) is a top view of a needle | mover, (b) is the same schematic front view. Example 1 In relation to the spring, (a) is a front view and (b) is a side view. Example 1 It is explanatory drawing which shows the magnetic pole by the side of a permanent magnet. Example 1 It is explanatory drawing which shows switching of the magnetic pole by the side of an electromagnet. Example 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image engraving apparatus 23 Permanent magnet side 25 Electromagnet side 27 Spring 27a Pointed part 27b Arc-shaped part 35a, 37a Polar part 47 Movable element 47a, 47b Polar part

Claims (7)

The pole part on the electromagnet side or the permanent magnet side is arranged with a gap between the opposing pole parts on the permanent magnet side or the electromagnet side supported on the fixed side,
Floating support of the electromagnet side or permanent magnet side with a spring with respect to the permanent magnet side or electromagnet side,
The spring is bent and formed into a cross-sectional water drop shape having a pointed portion on one side and an arc-shaped portion on the other side,
The pointed end side of the spring is supported on the permanent magnet side or the electromagnet side, and the arc-shaped portion side of the spring supports the electromagnet side or the permanent magnet side,
The electromagnet side or the permanent magnet side is vibrated by switching the energization to the electromagnet or permanent magnet side between forward and reverse,
A vibration generator characterized by that. The pole part on the electromagnet side consisting of the coil and the mover is arranged with a gap between the opposing pole parts on the permanent magnet side supported on the fixed side,
Floating support of the electromagnet side with a spring with respect to the permanent magnet side,
The spring is bent and formed into a cross-sectional water drop shape having a pointed portion on one side and an arc-shaped portion on the other side,
The pointed end side of the spring is supported on the permanent magnet side, and the arcuate portion side of the spring supports the electromagnet side movable element,
Vibrate the electromagnet side by switching forward and reverse energization to the electromagnet side;
A vibration generator characterized by that. The vibration generator according to claim 2,
The permanent magnet side is provided with a coil housing space portion that accommodates the coil portion on the electromagnet side so as to be able to vibrate in the center portion, and has a pair of opposing pole portions on the permanent magnet side on both sides of the coil housing space portion,
The electromagnet-side mover is disposed between both pole portions on the permanent magnet side with both pole portions protruding on both sides of the coil,
A vibration generator characterized by that. The vibration generator according to claim 3,
The springs are arranged symmetrically at four locations between the coil housing space on the permanent magnet side and the two pairs of poles and between the coil sides of the mover on the electromagnet side,
A vibration generator characterized by that. The vibration generator according to any one of claims 2 to 4,
Provided on the permanent magnet side is a pointed support recess for fitting and supporting the pointed end side of the spring,
An arc surface for fitting and supporting the arc-shaped portion of the spring is provided on the mover of the electromagnet,
A vibration generator characterized by that. An image engraving apparatus comprising the vibration generator according to any one of claims 2 to 5,
Engraving the medium to be engraved with an engraving needle linked to the electromagnet side by switching energization to the coil based on an engraving signal;
An image engraving apparatus. The image engraving apparatus according to any one of claims 1 to 6,
The spring is formed long so that the tip end side protrudes on both sides with respect to the arcuate portion side,
An image engraving apparatus .

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