JP7017244B2 - Date stamp - Google Patents

Description

The present invention relates to a date stamp provided with a printing unit capable of changing the date, and more particularly to a date stamp provided with a height adjusting mechanism for adjusting the height of the stamp surface of the printing unit.

This type of date stamp is disclosed in the date stamp of Patent Document 1 according to the proposal of the present applicant. In the date stamp of Patent Document 1, the printing unit is pushed up and urged by a spring provided between the frame of the printing unit and the bottom wall of the inner case, and the printing unit is pressed by the height adjustment mechanism provided between the outer case and the frame. By receiving it, the height of the stamp surface of the printing unit can be adjusted. The height adjustment mechanism is screwed into the adjustment dial (rotation adjustment body) that is externally engaged and engaged with the guide boss provided at the upper end of the outer case, but cannot be removed but cannot be removed, and the screw hole of the adjustment dial. It consists of two parts, an adjustment screw body (adjustment mat body) that is adjusted up and down with an adjustment dial, and a guide boss. The adjusting screw body is provided with a screw shaft screwed into the screw hole at the tip thereof, and a pair of square shaft-shaped pressing pieces for receiving the frame of the printing unit are integrally provided at the lower end thereof. Since the pressing piece can slide up and down with respect to the outer case, but cannot rotate, when the adjustment dial is rotated, the adjustment screw body moves up or down to adjust the receiving position of the pressing piece. It can be changed, and the height of the stamp surface of the printing unit can be adjusted. Further, the receiving wall protruding from the upper end of the guide boss and the elastic engaging piece provided on the adjusting dial form a pulsating mechanism, so that the adjusting dial can be held at a new adjustment position. A continuous corrugated uneven portion is formed on the peripheral surface of the receiving wall, and a ridge surface that engages with the corrugated concave portion is formed on a pair of elastic engaging pieces facing each other.

Japanese Patent No. 3642402

According to the date stamp of Patent Document 1, the height of the stamp surface of the printing unit can be adjusted by moving the adjusting screw body up or down by rotating the adjusting dial provided on the upper part of the outer case. However, when the date stamp is stored in a bag and carried, the adjustment dial may move by receiving an external force, and the height of the stamp surface of the printing unit may change. Further, when the rotation dial is rotated to change the date, the adjustment dial may be erroneously rotated to change the stamp surface height of the printing unit. In order to prevent such inadvertent rotation of the adjustment dial, the moderation mechanism is convenient in that the rotation of the adjustment dial can be suppressed. However, since the engaging force between the concave portion of the continuous waveform and the elastic engaging piece is small, a large external force acts on the adjustment dial, or if the adjustment dial is forcibly rotated, the adjustment dial rotates and the printing unit It is inevitable that the height of the stamp surface will change. Further, since the height adjustment mechanism is composed of two parts of the adjustment dial and the adjustment screw body and the guide boss, it is extremely difficult to newly add a lock structure for preventing the rotation of the adjustment dial.

An object of the present invention is to provide a lock structure that prevents the rotation adjuster from being rotated, and eliminates the rotation of the rotation adjuster unless the user has a clear intention to change the rotation adjuster to prevent the rotation adjuster from rotating. The purpose is to provide a date stamp that can surely prevent the height of the stamp face from changing.

In the present invention, the printing unit 2 provided with a plurality of printing belts 21 is housed inside the main case 5 so as to be vertically movable, and is pushed up and urged toward the stamp surface changing position by the spring 22. The target is a date stamp in which a height adjusting mechanism for adjusting the stamp surface height of the printing unit 2 is provided on the upper portion of the cover cylinder 6 that covers the outer surface of the printing unit 2. The height adjusting mechanism includes an adjusting nut body 43 mounted on the guide boss 42 on the upper wall of the cover cylinder 6, a stopper body 44 screwed into the screw boss 47 of the adjusting nut body 43, and a peripheral surface of the adjusting nut body 43. It is assembled on the upper wall of the cover cylinder 6 in a covered state, and includes a rotation adjusting body 45 for rotating the adjusting nut body 43. The adjusting nut body 43 is provided with an elastic engaging claw 49 that is engaged and mounted on the guide boss 42, and is freely rotated with respect to the guide boss 42, but is connected to the guide boss 42 so as not to be detachably connected to adjust the rotation. The body 45 is pulled out and held. The rotation adjusting body 45 includes a joint seat 60 that is received by the upper wall of the cover cylinder 6, and has a locked posture (state shown in FIG. 4) in which the joint seat 60 is joined to the upper wall of the cover cylinder 6 and a joint seat. The 60 can move up and down between the unlocked postures (state shown in FIG. 1) separated from the upper wall of the cover cylinder 6. Further, the joint surface of the joint seat 60 of the rotation adjuster 45 and the upper wall of the cover cylinder 6 in the lock posture is provided with a lock structure that engages with each other to prevent the rotation of the rotation adjuster 45 from rotating. do.

The lock structure is composed of a group of lock recesses 70 formed in a recess on the upper wall of the cover cylinder 6 and arranged in an annular shape, and a lock protrusion 71 provided on the joint seat 60 of the rotation adjusting body 45. In a state where the rotation adjusting body 45 is switched to the lock posture, the lock protrusion 71 engages with the lock recess 70 to regulate the rotation operation of the rotation adjusting body 45.

Between the rotation adjusting body 45 and the adjusting nut body 43, a driving body 64 and a passive body 65 that engage with each other and transmit the rotational operation of the rotation adjusting body 45 to the adjusting nut body 43 are provided.

A cylinder wall 61 is formed on the upper surface of the joint seat 60, and a notch 63 for receiving the elastic engaging claw 49 is provided between the adjacent cylinder walls 61 (see FIG. 5). The end wall of the tubular wall 61 facing the notch 63 also serves as the driving body 64, and the elastic engaging claw 49 also serves as the passive body 65.

An engaging piece 68 and an engaging rib 69 that engage with each other to hold the rotation adjusting body 45 in the locked posture are provided on the facing surfaces of the inner ring 59 of the rotation adjusting body 45 and the passive ring 46 of the adjusting nut body 43. (See Fig. 7). In the state where the rotation adjusting body 45 is switched to the unlocked posture, the engaging piece 68 gets over the engaging rib 69, and the upper end of the tubular wall 61 is received by the lower surface of the bridge wall 48.

A moderation structure is provided on the facing surface of the cylinder wall 61 of the rotation adjusting body 45 and the guide boss 42 to give a click feeling to the rotation adjusting body 45 to be rotated. As shown in FIG. 5, the moderation structure is composed of a moderation recess 72 formed on the peripheral surface of the guide boss 42 and a moderation rib 73 formed on the inner surface of the cylinder wall 61 and engaged with the moderation recess 72. ..

The rotation adjusting body 45 includes an operation ring 58 continuous with the upper shape of the cover cylinder 6, an inner ring 59 provided on the inner surface of the lower half of the ring 58, and a flange-shaped joint seat 60 provided at the lower end of the inner ring 59. , A partially arcuate tubular wall 61 provided on the upper surface of the joint seat 60 is integrally provided. The adjusting nut body 43 connects a passive ring 46 that is externally fitted to the guide boss 42 and inherits the rotational operation of the rotation adjusting body 45, a screw boss 47 that is internally fitted to the guide boss 42, and the passive ring 46 and the screw boss 47. It is equipped with a bridge wall 48. The elastic engaging claw 49 provided on the passive ring 46 is press-fitted and mounted in the circumferential groove 50 of the guide boss 42, and the adjusting nut body 43 retains and holds the rotation adjusting body 45.

In the present invention, the height adjusting mechanism is composed of the adjusting nut body 43, the stopper body 44, the rotation adjusting body 45, and the guide boss 42, and the joint seat 60 of the rotation adjusting body 45 is the upper wall of the cover cylinder 6. The rotation adjusting body 45 can be moved up and down between the lock posture for joining to the joint and the unlock posture for the joint seat 60 to be separated from the upper wall of the cover cylinder 6. Further, the joint surface of the joint seat 60 of the rotation adjuster 45 and the upper wall of the cover cylinder 6 in the lock posture is provided with a lock structure that engages with each other to prevent the rotation of the rotation adjuster 45 from rotating. According to such a date mark, when the rotation adjusting body 45 is switched to the locked posture, the rotation adjusting body 45 can be prevented from being rotated by the lock structure. Further, unless the user switches the rotation adjusting body 45 from the locked posture to the unlocked posture and performs a rotation operation with a clear intention of change, the stamp surface height of the printing unit 2 cannot be changed. Therefore, the rotation adjusting body 45 cannot be changed. Can be reliably prevented from rotating carelessly.

The lock structure is composed of a group of lock recesses 70 formed in a recess on the upper wall of the cover cylinder 6 and arranged in an annular shape, and a lock protrusion 71 provided on the joint seat 60 of the rotation adjusting body 45. According to such a lock structure, when the rotation adjusting body 45 is switched to the locked posture, the lock protrusion 71 engages with the lock recess 70 to reliably regulate the rotational operation of the rotation adjusting body 45. Further, it can be confirmed whether or not the rotation adjusting body 45 has switched to an appropriate locked posture by checking whether or not the joining seat 60 is in close contact with the upper wall of the cover cylinder 6. In a state where the lock protrusion 71 is supported by the upper wall of the cover cylinder 6, a gap is formed between the cover cylinder 6 and the rotation adjusting body 45. It can be easily and clearly confirmed that it is not engaged with. In addition, the presence of the gap can arouse the user's attention and urge that the rotation adjusting body 45 needs to be switched to an appropriate locked posture.

According to the date mark in which the drive body 64 and the passive body 65 are provided between the rotation adjusting body 45 and the adjusting nut body 43, the rotational movement of the rotation adjusting body 45 is adjusted by the driving body 64 and the passive body 65 that engage with each other. It can be transmitted to the nut body 43 to change and adjust the receiving position of the printing unit 2 by the stopper body 44. That is, similarly to the date mark provided with the conventional height adjusting mechanism, the receiving position of the printing unit 2 by the stopper body 44 is changed and adjusted by simply rotating the rotation adjusting body 45 switched to the unlocked posture. Therefore, even a user who is accustomed to using a date stamp equipped with a conventional height adjustment mechanism can perform height adjustment work without discomfort.

In the date mark where the cylinder wall 61 and the notch 63 are provided on the upper surface of the joint seat 60 of the rotation adjusting body 45, the end wall of the cylinder wall 61 facing the notch 63 can also serve as the drive body 64, and further adjustment is made. The elastic engaging claw 49 of the nut body 43 can also serve as the passive body 65. Therefore, the height adjusting mechanism is prevented from being unnecessarily complicated as compared with the case where the driving body 64 and the passive body 65 that engage with each other are provided separately from the cylinder wall 61 and the elastic engaging claw 49. The manufacturing cost of the mark can be reduced.

An engaging piece 68 and an engaging rib 69 that engage with each other to hold the rotation adjusting body 45 in the locked posture are provided on the facing surfaces of the inner ring 59 of the rotation adjusting body 45 and the passive ring 46 of the adjusting nut body 43. I made it. According to such a date mark, when the rotation adjusting body 45 is switched to the locked posture, the engaging piece 68 and the engaging rib 69 engage with each other to hold the rotation adjusting body 45 in the locked posture. For example, it is possible to reliably prevent the rotation adjusting body 45 from receiving an external force and switching to the unlocked posture. Further, in a state where the rotation adjusting body 45 is switched to the unlocking posture by the user, the rotation adjusting body 45 is in the unlocking posture due to the operating resistance and the disappearance of the operating resistance while the engaging piece 68 gets over the engaging rib 69. It is possible to recognize that the switch has been made to. Further, in the state where the rotation adjusting body 45 is switched to the unlocking posture, the upper end of the cylinder wall 61 is received by the lower surface of the bridge wall 48, and the rotation adjusting body 45 is moved upward beyond the unlocking posture. Can be regulated.

A moderation structure including a moderation recess 72 and a moderation rib 73 is provided on the facing surface of the cylinder wall 61 of the rotation adjusting body 45 and the guide boss 42. According to such a date mark, when the rotation adjusting body 45 switched to the unlocked posture is rotated, the moderation rib 73 is pulled out from the moderation recess 72 and then falls into the adjacent moderation recess 72 again and clicks each time it engages. While giving a feeling, the rotation adjusting body 45 can be held at a new adjustment position operated by rotation. Therefore, the rotation operation of the rotation adjusting body 45 and the confirmation of the printing status of the printing unit 2 can be alternately performed to accurately adjust the printing surface height of the printing unit 2.

The rotation adjusting body 45 is provided with an operation ring 58, an inner ring 59, a flange-shaped joint seat 60, and a partially arc-shaped tubular wall 61 integrally. Further, the adjusting nut body 43 includes a passive ring 46 that inherits the rotational operation of the rotation adjusting body 45, a screw boss 47 that is internally fitted in the guide boss 42, and a bridge wall 48 that connects the passive ring 46 and the screw boss 47. I did it. According to such a date mark, the elastic engaging claw 49 provided on the passive ring 46 is press-fitted and mounted in the circumferential groove 50 of the guide boss 42, so that the adjusting nut body 43 itself cannot be removed from the guide boss 42. The rotation adjusting body 45 can be pulled out and held by the adjusting nut body 43 at the same time while being connected to the adjusting nut body 43.

It is a vertical sectional front view of the main part of the date stamp which concerns on this invention. It is a partially broken front view of the date mark which concerns on this invention. It is a side view of the date stamp which concerns on this invention, and shows the state which the cover cylinder is switched to the open posture. It is a vertical sectional front view of the date stamp which concerns on this invention. It is an exploded perspective view of the height adjustment mechanism. It is an exploded sectional view of the height adjustment mechanism. It is a vertical sectional side view of the main part which shows the state which the rotation adjustment body has switched to the unlocked posture. It is a vertical sectional side view of the main part which shows the state which the rotation adjustment body has switched to the lock posture. FIG. 4 is a cross-sectional view taken along the line AA in FIG.

(Example)
1 to 9 show examples of date stamps according to the present invention. The front / rear, left / right, and up / down in the present invention follow the crossing arrows shown in FIGS. 2 and 3 and the notations of front / back, left / right, and up / down in the vicinity of the arrows. In FIG. 2, the date stamp is a stamp surface covering the main body case 1, the printing unit 2 housed inside the main body case 1, the fixed printing body 3 arranged at the lower end of the main body case 1, and the stamp surface of the fixed printing body 3. It is equipped with a cap 4 and the like.

The main body case 1 is composed of a main case 5 for accommodating the printing unit 2 and a cover cylinder 6 for covering the outer surface of the main case 5. The main case 5 is formed by joining a half-split front case 5A and a rear case 5B, each of which is made of a plastic molded product, and has recesses 7 and 7 on the front surface of the front case 5A and the rear surface of the rear case 5B, respectively. A slit 8 is formed in each of the recesses 7 and 7 for exposing the adjustment dial 19 of the printing unit 2 described later (see FIG. 3). Square-shaped guide protrusions 9 for opening and closing the cover cylinder 6 are provided on the upper left and right sides of the main case 5. As described above, when the space between the adjustment dials 19 is blocked by the concave wall, it is possible to prevent the fingertips from touching the printing belt 21 described later when the adjustment dial 19 is rotated to change the date. Therefore, it is possible to eliminate the stain on the fingertips with the ink adhering to the printing belt 21.

The cover cylinder 6 is made of a round tubular plastic molded product whose upper end is closed by an upper wall, and slide grooves 12 guided by the guide protrusions 9 on the left and right sides of the inner surface of the cylinder wall are formed on the lower end of the cylinder wall. It is formed from the side to the upper part of the cylinder (see FIGS. 3 and 6). A regulation groove 13 for restricting the upper slide of the cover cylinder 6 is formed at the upper end of the slide groove 12. By fitting the cover cylinder 6 to the main case 5 and sliding the slide groove 12 with the guide protrusion 9, the cover cylinder 6 has a closed posture (state shown in FIG. 2) covering the outer surface of the main case 5 and a recess. The posture can be changed to the open posture (state shown in FIG. 3) in which the outer surface of 7 is opened. Further, by rotating the cover cylinder 6 in the closed posture in the clockwise rotation direction, the regulation groove 13 can be engaged with the guide protrusion 9 to restrict the cover cylinder 6 from being pulled out upward. A moderation protrusion 14 is provided in the middle of the regulation groove 13 to regulate the cover cylinder 6 from rotating in the counterclockwise rotation direction. Therefore, when changing the date, the cover cylinder 6 is rotated in the counterclockwise rotation direction, and the cover cylinder 6 is moved in a state where the guide protrusion 9 overcoming the moderation protrusion 14 is located at the upper end of the slide groove 12. The adjustment dial 19 is exposed by pulling it upward. A front mark 15 made of a flat surface is formed on the front peripheral surface of the cover cylinder 6.

In FIG. 4, the printing unit 2 is mounted on a gate-shaped frame 17, a dial shaft 18 supported by the facing wall thereof, five adjustment dials 19 supported by the dial shaft 18, and the dial 19 and the lower end of the frame 17. It is composed of five printing belts 21 and the like wound around the plastic bridge 20. The printing belt 21 is provided with double-digit year numbers, month numbers, and letter blocks for printing day numbers at regular intervals, and only the printing belt 21 for printing month numbers prints one. It consists of a belt.

The print unit 2 can move up and down in the main case 5 to move between the lower print position and the upper date change position. The printing unit 2 is a compression coil type spring 22 that is pushed up and urged toward the date change position. The spring 22 is located between the spring receiving seats 23 provided on the left and right sides of the lower end of the frame 17 and the lower case 24 described later. Have been placed. In order to restrict the printing unit 2 from moving upward beyond the date change position, a rib-shaped stopper 25 for receiving the spring receiving seat 23 is provided near the lower end of the inner surface of the main case 5.

The lower case 24 includes an upper cylinder portion 24a that is externally fitted to the lower portion of the main case 5 and a lower cylinder portion 24b to which the fixed printing body 3 is mounted, and the stamp face cap 4 can be detachably removed from the lower cylinder portion 24b. It is fitted and attached (see FIG. 2). The fixed printing body 3 is composed of a disk-shaped stamp surface holder 28 and a circular rubber printing body 29 fixed to the holder 28, and a mounting claw 30 projecting from the upper surface of the stamp surface holder 28 is provided with a mounting hole for the lower cylinder portion 24b. The stamp face holder 28 is integrated with the lower case 24 by being press-fitted and engaged with. The inner bottom wall of the lower case 24 and the upper wall of the stamp face holder 28 are opened with exits 31 and 32 that allow the printing belt 21 to enter and exit. A group of non-slip grooves is formed on the peripheral surface of the upper cylinder portion 24a.

In FIG. 2, the stamp face cap 4 includes a cap main body 34 and a cap lid 35 that closes the lower opening of the main body 34, and an ink coating unit is arranged on the inner bottom of the cap main body 34. The ink coating unit includes a mat holder 37 that is vertically movable and is pushed up and urged by a mat spring 36, and an ink impregnated mat 38 that is fixed to the mat holder 37. When the stamp surface cap 4 is attached to the lower case 24 (see FIG. 3), the stamp surface of the fixed printing body 3 and the stamp surface of the printing belt 21 are pressed against the ink-impregnated mat 38, and the ink coating unit is a mat spring. It is pushed down and moved against the urging force of 36.

In the state where the printing unit 2 is held at the printing position, a height adjusting mechanism is provided on the upper part of the cover cylinder 6 in order to adjust the printing surface height of the printing unit 2 with respect to the printing surface of the fixed printing body 3. The height adjustment mechanism rotates the adjustment nut body 43 mounted on the guide boss 42 provided on the upper wall of the cover cylinder 6, the stopper body 44 screwed into the screw boss 47 of the adjustment nut body 43, and the adjustment nut body 43. It is equipped with a rotation adjusting body 45 or the like to be operated. The rotation adjusting body 45 is assembled to the upper wall of the cover cylinder 6 so as to cover the peripheral surface of the adjusting nut body 43.

In FIGS. 5 and 6, the adjusting nut body 43 includes a passive ring 46 that is externally fitted to the guide boss 42 and inherits the rotational operation of the rotation adjusting body 45, a screw boss 47 that is internally fitted to the guide boss 42, and a passive ring 46. A pair of bridge wall 48s connecting the screw boss 47 and the screw boss 47, and elastic engaging claws 49 extending to the lower surface side of two facing portions of the passive ring 46 are integrally provided. With the rotation adjusting body 45 sandwiched between the cover cylinder 6 and the adjusting nut 43, the elastic engaging claw 49 is press-fitted into the circumferential groove 50 of the guide boss 42 while the screw boss 47 is internally fitted into the guide boss 42. By doing so, the adjusting nut body 43 can rotate freely, but is connected to the guide boss 42 so as not to be detachable, while retaining and holding the rotation adjusting body 45. At the time of actual assembly, the elastic engaging claw 49 is press-fitted and mounted in the circumferential groove 50 while the stopper body 44 is screwed into the screw boss 47 and the stopper protrusion 53 is inserted into the opening 55.

The stopper body 44 has a screw shaft 52 screwed into the screw hole 51 of the adjusting nut body 43, a square shaft-shaped stopper protrusion 53 projecting from the lower surface of the screw shaft 52, and a circle extending over the upper surface of the screw shaft 52. It is provided with a plate-shaped lid wall 54. A circular display label (not shown) indicating the print content of the fixed printing body 3 can be attached to the lid wall 54. The stopper protrusion 53 projects into the inside of the cover cylinder 6 through a square through hole 55 formed on the upper wall of the cover cylinder 6, and the upper wall of the frame 17 of the printing unit 2 is received at the lower end portion thereof. The stopper protrusion 53 can move up and down at the through port 55, but is held so that it cannot rotate. Therefore, when the adjusting nut body 43 is rotated by the rotation adjusting body 45, the screw shaft 52 of the stopper body 44 moves up and down, the receiving position of the stopper protrusion 53 is changed up and down, and the stamp surface height of the printing unit 2 is increased. Can be adjusted. Engagement claws 56 for elastically deformable fall prevention are formed on the left and right sides of the lower end of the stopper protrusion 53.

The rotation adjusting body 45 includes an operation ring 58 that is continuously formed in the upper shape of the cover cylinder 6 in an upward squeeze shape, an inner ring 59 provided on the inner surface of the lower half of the ring 58, and a lower end of the inner ring 59. The flange-shaped joint seat 60 provided in the joint seat 60 and the partially arcuate tubular wall 61 provided at two facing positions on the upper surface of the joint seat 60 are integrally provided. A notch 63 for receiving the elastic engaging claw 49 is provided between the adjacent cylinder walls 61, and the lid wall 54 is accommodated in the upper recess 62 on the inner surface of the upper half of the operation ring 58. In the state where the rotation adjusting body 45 is attached to the cover cylinder 6, the elastic engaging claw 49 is accommodated in the notch 63 between the pair of cylinder walls 61. Therefore, when the rotation adjusting body 45 is rotated, the notch portion is formed. The end wall of the tubular wall 61 facing the 63 is engaged with the elastic engaging claw 49, and the adjusting nut body 43 can be rotated along with the rotation adjusting body 45. As described above, the end wall of the cylinder wall 61 facing the notch 63 also serves as a drive body 64 that transmits the rotation operation of the rotation adjusting body 45 to the adjusting nut body 43, and the elastic engaging claw 49 is the rotation adjusting body 45. It also serves as a passive body 65 that inherits the rotational movement. Therefore, there is an advantage that the height adjusting mechanism can be simplified as compared with the case where the drive body 64 and the passive body 65 that engage with each other are separately provided.

As described above, the rotation adjusting body 45 mounted on the cover cylinder 6 is held by the adjusting nut body 43 engaged and mounted on the guide boss 42. Specifically, engaging pieces 68 are projected at eight positions on the inner surface of the inner ring 59, and engaging ribs 69 are provided on the peripheral wall of the passive ring 46. The rotation adjusting body 45 has a lock posture in which the joint seat 60 is in close contact with the upper wall of the cover cylinder 6 (states shown in FIGS. 4 and 8) and an unlock posture in which the joint seat 60 is separated from the upper wall of the cover cylinder 6 (states shown in FIGS. 4 and 8). It can move up and down between the states shown in FIG. 7). In the state where the rotation adjusting body 45 is in the locked posture, the upper portion of the engaging piece 68 is held and held by the engaging rib 69. Further, when the rotation adjusting body 45 switched to the locked posture is pulled upward, the engaging piece 68 gets over the engaging rib 69 and becomes the unlocked posture as shown in FIG. 7, and the cylinder wall 61 in this state. The upper end of the bridge is received by the lower surface of the bridge wall 48. Therefore, the rotation adjusting body 45 does not move upward beyond the unlocked posture.

A lock structure is provided on the joint surface (upper surface) of the upper wall of the joint seat 60 of the rotation adjuster 45 and the cover cylinder 6 in order to prevent the rotation of the rotation adjuster 45 switched to the lock posture. Further, in a state where the rotation adjusting body 45 is switched to the unlocked posture, a moderation structure is provided on the facing surface of the cylinder wall 61 and the guide boss 42 in order to give a click feeling to the rotation adjusting body 45 to be rotated. There is.

The lock structure is composed of a group of lock recesses 70 formed in recesses on the upper wall of the cover cylinder 6 and arranged in an annular shape, and lock protrusions 71 provided at two facing positions on the lower surface of the joint seat 60. The lock recess 70 is formed of a rectangular recess having long sides along the radial direction, and is radially arranged around the guide boss 42. The lock protrusion 71 is formed of a rectangular protrusion having a long side portion along the radial direction having the same shape as the lock recess 70.

As shown in FIG. 1, when the rotation adjusting body 45 is switched to the unlocked posture, the lock protrusion 71 is separated from the lock recess 70. Therefore, the rotation adjusting body 45 is rotated to increase the printing unit 2 stamp surface height. However, as shown in FIG. 4, when the rotation adjusting body 45 is switched to the lock posture and the pair of lock protrusions 71 are engaged with the lock recess 70, the rotation operation applied to the rotation adjusting body 45 is performed. Since the force is received by the lock recess 70, the rotation adjusting body 45 rotates and the stamp surface height of the printing unit 2 does not change. In this embodiment, since the lock recesses 70 are formed at 20 positions around the guide boss 42, the lock protrusion 71 can be engaged with the lock recess 70 every time the rotation adjusting body 45 rotates 18 degrees. Contrary to this embodiment, a group of lock recesses 70 may be formed in the joint seat 60, and a plurality of lock protrusions 71 may be formed in the upper wall of the cover cylinder 6.

As shown in FIG. 5, the moderation structure consists of a moderation recess 72 formed on the peripheral surface of the guide boss 42 facing the inside and outside, and a pair of moderation recesses 72 formed at the facing positions on the inner surface of the cylinder wall 61 and engaged with the moderation recess 72. It is composed of a moderation rib 73. The moderation recess 72 is formed from the base end of the guide boss 42 to the circumferential groove 50, and the moderation rib 73 is formed from the lower end to the upper end of the inner surface of the cylinder wall 61. In the state where the rotation adjusting body 45 is switched to the unlocked posture, the lower part of the moderation rib 73 gets over the upper part of the moderation recess 72 to give a click feeling to the rotation adjusting body 45 to be rotated.

According to the date mark configured as described above, in the state where the rotation adjusting body 45 is switched to the locked posture, the rotation adjusting body 45 can be prevented from being rotated by the lock structure. Specifically, in the state where the rotation adjusting body 45 is switched to the lock posture, even if a rotational force is applied to the rotation adjusting body 45, the lock protrusion 71 and the lock recess 70 are engaged with each other, so that the rotation adjusting body 45 is engaged. The 45 cannot be rotated. Therefore, unless the user switches the rotation adjusting body 45 to the unlocked posture and performs the rotation operation with a clear intention of change, the printing unit 2 cannot change the stamp surface height, and the rotation adjusting body 45 is inadvertently prepared. It can surely prevent it from rotating. When the date stamp is stored in a bag and carried, or when the date is changed by operating the adjustment dial 19, the rotation adjusting body 45 is erroneously rotated to raise the stamp surface height of the printing unit 2. The change can be surely eliminated.

According to the lock structure composed of a group of lock recesses 70 formed in the upper wall of the cover cylinder 6 and a lock protrusion 71 provided on the joint seat 60 of the rotation adjusting body 45, the joint seat 60 is the upper wall of the cover cylinder 6. It can be confirmed whether or not the rotation adjusting body 45 has switched to the proper locked posture depending on whether or not the rotation adjusting body 45 is in close contact with the lock posture. Incidentally, when the lock protrusion 71 is supported by the upper wall of the cover cylinder 6, a gap is formed between the cover cylinder 6 and the rotation adjusting body 45, so that the lock protrusion 71 is locked only by checking the presence or absence of the gap. It can be easily and clearly confirmed that the recess 70 is not engaged. Further, there is an advantage that the presence of the gap attracts the user's attention and prompts that the rotation adjusting body 45 needs to be switched to an appropriate locked posture.

According to the date mark in which the drive body 64 and the passive body 65 are provided between the rotation adjusting body 45 and the adjusting nut body 43, the rotation operation of the rotation adjusting body 45 is engaged with each other via the driving body 64 and the passive body 65. The position of the printing unit 2 received by the stopper body 44 can be changed and adjusted by transmitting the information to the adjusting nut body 43. That is, similarly to the date mark provided with the conventional height adjusting mechanism, the receiving position of the printing unit 2 by the stopper body 44 is changed and adjusted by simply rotating the rotation adjusting body 45 switched to the unlocked posture. Therefore, even a user who is accustomed to using a date stamp equipped with a conventional height adjustment mechanism can perform height adjustment work without discomfort.

According to the date mark provided with the cylinder wall 61 and the notch 63 on the upper surface of the joint seat 60 of the rotation adjusting body 45, the end wall of the cylinder wall 61 facing the notch 63 can also serve as the drive body 64. The elastic engaging claw 49 of the adjusting nut body 43 can also serve as the passive body 65. Therefore, the height adjusting mechanism is prevented from being unnecessarily complicated as compared with the case where the driving body 64 and the passive body 65 that engage with each other are provided separately from the cylinder wall 61 and the elastic engaging claw 49. The manufacturing cost of the mark can be reduced.

Since the engaging piece 68 and the engaging rib 69 are provided on the facing surfaces of the inner ring 59 and the passive ring 46, the engaging piece 68 and the engaging rib 69 are mutually provided in a state where the rotation adjusting body 45 is switched to the locked posture. Since the rotation adjusting body 45 can be engaged with each other to hold the position of the rotation adjusting body 45 in the locked posture, for example, it is possible to reliably prevent the rotation adjusting body 45 from receiving an external force and switching to the unlocked posture. Further, in a state where the rotation adjusting body 45 is switched to the unlocking posture by the user, the rotation adjusting body 45 is in the unlocking posture due to the operating resistance and the disappearance of the operating resistance while the engaging piece 68 gets over the engaging rib 69. It is possible to recognize that the switch has been made to. Further, in the state where the rotation adjusting body 45 is switched to the unlocking posture, the upper end of the cylinder wall 61 is received by the lower surface of the bridge wall 48, and the rotation adjusting body 45 is moved upward beyond the unlocking posture. Can be regulated.

Since a moderation structure including a moderation recess 72 and a moderation rib 73 is provided on the facing surface of the cylinder wall 61 of the rotation adjustment body 45 and the guide boss 42, when the rotation adjustment body 45 switched to the unlocked posture is rotated. After the moderation rib 73 is pulled out from the moderation recess 72, the rotation adjusting body 45 can be held at a new adjustment position operated by rotation while giving a click feeling each time the moderation rib 73 falls into the adjacent moderation recess 72 again and engages with the moderation recess 72. Therefore, the rotation operation of the rotation adjusting body 45 and the confirmation of the printing status of the printing unit 2 can be alternately performed to accurately adjust the printing surface height of the printing unit 2.

The rotation adjusting body 45 is integrally provided with an operation ring 58, an inner ring 59, a flange-shaped joint seat 60, and a partially arc-shaped tubular wall 61. Further, the adjusting nut body 43 includes a passive ring 46 that inherits the rotational operation of the rotation adjusting body 45, a screw boss 47 that is internally fitted in the guide boss 42, and a bridge wall 48 that connects the passive ring 46 and the screw boss 47. I made it. According to such a date mark, the elastic engaging claw 49 provided on the passive ring 46 is press-fitted and mounted in the circumferential groove 50 of the guide boss 42, so that the adjusting nut body 43 itself cannot be removed from the guide boss 42. The rotation adjusting body 45 can be pulled out and held by the adjusting nut body 43 at the same time while being connected to the adjusting nut body 43.

In the above embodiment, the lock recess 70 and the lock protrusion 71 are formed of a rectangular recess and protrusion having long sides along the radial direction, but it is not necessary, for example, the lock recess 70 is formed of a circular recess. The lock protrusion 71 can be formed in the shape of a round pin. Further, three or more lock protrusions 71 can be provided. The stopper protrusion 53 does not have to have a square shaft shape, and may be a shaft or a tube having a non-circular cross section such as an oval or D-shaped cross section. A group of non-slip grooves or a group of ribs may be formed on the peripheral surface of the operation ring 58.

2 Printing unit 5 Main case 6 Cover cylinder 17 Frame 21 Printing belt 22 Spring 42 Guide boss 43 Adjusting nut body 44 Stopper body 45 Rotation adjusting body 46 Passive ring 47 Screw boss 49 Elastic engaging claw 50 Circumferential groove 51 Thread hole 52 Thread shaft 53 Stopper protrusion 55 Passage port 58 Operation ring 59 Inner ring 60 Joint seat 61 Cylinder wall 63 Notch 64 Drive body 65 Passive body 68 Engagement piece 69 Engagement rib 70 Lock recess 71 Lock protrusion 72 Moderation recess 73 Moderation rib

Claims (7)

A printing unit (2) provided with a plurality of printing belts (21) is housed inside the main case (5) so as to be vertically movable, and is pushed up and urged by a spring (22) toward a printing surface change position. A date stamp having a height adjusting mechanism for adjusting the height of the printing unit (2) on the upper part of the cover cylinder (6) covering the outer surface of the main case (5).
The height adjustment mechanism includes an adjustment nut body (43) mounted on the guide boss (42) on the upper wall of the cover cylinder (6) and a stopper body (47) screwed into the screw boss (47) of the adjustment nut body (43). 44) and a rotation adjusting body (45) that is assembled to the upper wall of the cover cylinder (6) so as to cover the peripheral surface of the adjusting nut body (43) and rotates the adjusting nut body (43). And
The adjusting nut body (43) is provided with an elastic engaging claw (49) that is engaged and mounted on the guide boss (42) so that it can rotate freely with respect to the guide boss (42), but from the guide boss (42). It is connected so that it cannot be pulled out, and the rotation adjuster (45) is held in place.
The rotation adjusting body (45) is provided with a joint seat (60) that is received by the upper wall of the cover cylinder (6), and has a lock posture in which the joint seat (60) is joined to the upper wall of the cover cylinder (6). , The joint seat (60) can move up and down between the unlocked postures separated from the upper wall of the cover tube (6).
A lock structure is provided on the joint surface of the upper wall of the joint seat (60) of the rotation adjuster (45) and the cover cylinder (6) in the locked posture to engage with each other and prevent the rotation of the rotation adjuster (45) from rotating. A date stamp characterized by being. The lock structure is a group of lock recesses (70) formed in a recess on the upper wall of the cover cylinder (6) and arranged in an annular shape, and a lock protrusion (71) provided on the joint seat (60) of the rotation adjuster (45). ) And
Claim 1 in which the lock protrusion (71) engages with the lock recess (70) to regulate the rotational operation of the rotation adjuster (45) in a state where the rotation adjuster (45) is switched to the lock posture. The date stamp listed in. A drive body (64) and a passive body (65) that engage with each other between the rotation adjusting body (45) and the adjusting nut body (43) and transmit the rotational operation of the rotation adjusting body (45) to the adjusting nut body (43). ) And the date stamp according to claim 1 or 2. A cylinder wall (61) is formed on the upper surface of the joint seat (60), and a notch (63) for receiving the elastic engaging claw (49) is provided between the adjacent cylinder walls (61).
The date according to claim 3, wherein the end wall of the tubular wall (61) facing the notch (63) also serves as a driving body (64), and the elastic engaging claw (49) also serves as a passive body (65). mark. Engagement that engages with the facing surfaces of the inner ring (59) of the rotation adjusting body (45) and the passive ring (46) of the adjusting nut body (43) to hold the rotation adjusting body (45) in the locked posture. A piece (68) and an engaging rib (69) are provided and
In a state where the rotation adjusting body (45) is switched to the unlocked posture, the engaging piece (68) gets over the engaging rib (69), and the upper end of the tubular wall (61) is the lower surface of the bridge wall (48). The date stamp according to claim 4, which is accepted in. A moderation structure is provided on the facing surface of the cylinder wall (61) of the rotation adjusting body (45) and the guide boss (42) to give a click feeling to the rotation adjusting body (45) to be rotated.
The moderation structure consists of a moderation recess (72) formed on the peripheral surface of the guide boss (42) and a moderation rib (73) formed on the inner surface of the cylinder wall (61) and engaged with the moderation recess (72). The date stamp according to claim 4 or 5 that is configured. The rotation adjusting body (45) includes an operation ring (58) continuous with the upper shape of the cover cylinder (6), an inner ring (59) provided on the inner surface of the lower half of the ring (58), and an inner ring (59). A flange-shaped joint seat (60) provided at the lower end of the joint seat (60) and a partially arcuate tubular wall (61) provided on the upper surface of the joint seat (60) are integrally provided.
The adjusting nut body (43) has a passive ring (46) that is externally fitted to the guide boss (42) and inherits the rotational operation of the rotation adjusting body (45), and a screw boss (47) that is internally fitted to the guide boss (42). ), And a bridge wall (48) connecting the passive ring (46) and the screw boss (47).
The elastic engaging claw (49) provided on the passive ring (46) is press-fitted into the circumferential groove (50) of the guide boss (42), and the adjusting nut body (43) pulls out the rotation adjusting body (45). The date stamp according to any one of claims 1 to 6 which is held and held.

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