Stamp

Abstract

To provide a stamp which facilitates the replacement of parts and can suppress the contamination of the surroundings during the replacement of the parts.SOLUTION: The seal holder includes an inner cylinder 10, an outer cylinder 11 which houses the inner cylinder 10 and is vertically movable with respect to the inner cylinder 10, a seal holding cylinder 13 which is disposed inside the inner cylinder 10 so as to be interlocked with the vertical movement of the outer cylinder 11, a printing body which is housed in the seal holding cylinder 13, and a rotary lid 12 which is opened and closed in conjunction with the vertical movement of the outer cylinder 11. In a seal 1 in which a seal face is housed in an inner cylinder 10 at a position where an outer cylinder 11 is moved upward to be in a non-sealing state, a rotary lid 12 can be fixed in an opened state in the non-sealing state.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to a stamp that stamps by pressing down a printing body housed inside an inner cylinder together with an outer cylinder. [Background technology]

[0002] In order to eliminate the need to touch the seal surface to the vermilion ink pad each time a stamp is stamped, a stamp stamp is known in which the vermilion ink pad is held in a rotating lid facing the seal surface, and the rotating lid opens and closes in conjunction with the stamping operation. Among these stamp stamps, some are known to have a mechanism that can hold the rotating lid in an open position for maintenance such as replacing the vermilion ink pad.

[0003] For example, Patent Document 1 describes a seal case in which the rotating lid can be held in an inverted position by pressing down on the outer tube (holder) to open it, and then gripping the rotating lid with the hand and rotating it in the opening direction. However, this seal requires manual release of the inverted rotating lid, making the operation cumbersome. Furthermore, the rotating lid is not fixed in the inverted position shown in Figure 14 of the document, but rather swings within a predetermined range. Therefore, depending on the orientation of the seal case relative to the direction of gravity, it may be necessary to hold the rotating lid in place with a fingertip to prevent it from moving during operation.

[0004] Patent Document 2 describes a stamp that can fix the rotating lid in the open position by sliding a slide operation piece provided on the side of the outer tube with a fingertip. This stamp does not require the rotating lid to be directly gripped with the fingertip to operate as in Patent Document 1, and can be fixed and unlocked in the open position by operating the slide operation piece provided on the side of the outer tube. However, because the rotating lid is fixed with the outer tube pressed down and the printing surface exposed, there is a risk of ink getting on the surrounding area. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4316828 [Patent Document 2] Patent No. 6924407 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a stamp which solves the above-mentioned problems of the conventional art, which allows easy replacement of parts, and which can suppress contamination of the surrounding area when replacing parts. [Means for solving the problem]

[0007] The present invention, which has been made to solve the above-mentioned problems, comprises an inner tube, an outer tube that houses the inner tube and is capable of moving up and down relative to the inner tube, a seal holding tube arranged inside the inner tube so that it can be linked to the up and down movement of the outer tube, a printing body stored in the seal holding tube, and a rotating lid that opens and closes in linkage with the up and down movement of the outer tube, and when the outer tube is moved downwards, the printing surface of the printing body is exposed from the lower end of the inner tube, entering a stamping state, and when the outer tube is moved upwards, the printing surface is stored in the inner tube, entering a non-stamping state, and is characterized in that when in the non-stamping state, the rotating lid can be fixed in an open position.

[0008] In addition, the stamp is equipped with a lid opening / closing mechanism that opens the rotating lid as the outer tube moves downward and closes the rotating lid as the outer tube moves upward, and it is preferable that the lid opening / closing mechanism has the function of fixing the rotating lid in an open position when the rotating lid is opened more than a predetermined angle.

[0009] Furthermore, it is preferable that the rotating lid has the tips of its left and right arms rotatably held on the left and right side walls of the inner tube, and that the lid opening and closing mechanism comprises cam followers provided on the back surfaces of the tips of the left and right arms and protruding inward from the side walls, and a cam member formed on the lower part of the seal holding tube that rotates the cam followers in the lid opening direction as the outer tube moves downward.

[0010] In addition, it is preferable that the cam member comprises a cam plate portion and a cam protrusion formed on the lower end side of the cam plate portion, and that the cam protrusion engages with the cam follower when the rotating lid is opened to a predetermined angle or more, thereby restricting the rotation of the cam follower, thereby fixing the rotating lid in the open position.

[0011] Furthermore, it is preferable that, with the rotary lid fixed at an opening angle equal to or greater than a predetermined angle, the engagement between the cam protrusion and the cam follower is released by moving the outer cylinder downward relative to the inner cylinder.

[0012] It is also preferable that the cam protrusion fixes the rotary lid at an opening angle of 90 degrees or more. [Effects of the Invention]

[0013] The stamp of the present invention can be fixed with the rotary lid open when the seal face is stored and in a non-stamping state, making it easy to replace parts such as red ink, and eliminating the risk of contaminating the surrounding area with the seal face or red ink.

[0014] Furthermore, with the configuration described in claim 2, the downward movement of the outer cylinder causes the rotating lid to become less than the predetermined angle due to its own weight, and the fixed rotating lid can be easily released. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is an external perspective view of the stamp of the embodiment, seen from diagonally the front side. [Figure 2] 1A and 1B are perspective views of the stamp of the embodiment, seen from the diagonal rear side, showing a state in which the downward movement of the outer tube relative to the inner tube is unlocked, and a state in which the downward movement of the outer tube relative to the inner tube is locked. [Figure 3] FIG. 2 is a front view of the stamp of the embodiment. [Figure 4] FIG. 2 is a right side view of the stamp of the embodiment. [Figure 5] 1A and 1B are exploded perspective views of a stamp according to an embodiment, in which (a) is a view of the stamp as seen from the diagonally front right, and (b) is a view of the stamp as seen from the diagonally rear right. [Figure 6] 5 is a cross-sectional view taken along the line AA in FIG. 4. [Figure 7] FIG. 10 is a schematic diagram showing the position of the seal in the initial position. [Figure 8] FIG. 10 is a schematic diagram showing a state in which the outer cylinder is pressed down to perform a stamping operation. [Figure 9] 1A is a schematic diagram showing the positional relationship between the operating piece and the inner cylinder when the outer cylinder is locked in the initial position, and FIG. 1B is a partially enlarged rear view of the stamp as seen from the rear side, and FIG. 1B is a partially enlarged cross-sectional view taken along the dashed line in FIG. 1A. [Figure 10] 1A is a schematic diagram showing the positional relationship between the operating piece and the inner cylinder when the outer cylinder is in the initial position and unlocked. FIG. 1B is a partially enlarged rear view of the stamp as seen from the rear side, and FIG. 1B is a partially enlarged cross-sectional view taken along the dashed line in FIG. 1A. [Figure 11] 10A to 10C are explanatory diagrams showing a series of stamping operations. [Figure 12] 1 is a diagram showing a schematic diagram of the positional relationship between a cam follower and a cam member, in which a part of a rotary lid and a part of a seal holding tube are shown by solid lines. [Figure 13] 1A is a schematic diagram showing a cam member of an embodiment, in which (a) is a perspective view of the seal holder tube as seen obliquely from the front, (b) is a side view of the seal holder tube, and (c) is an enlarged side view of the cam member. [Figure 14] 1A and 1B are schematic diagrams showing a rotary lid and a cam follower according to an embodiment, in which (a) and (b) are perspective views of the rotary lid, (c) is a diagram showing the back surface of the arm of the rotary lid, (d) is a diagram showing the positional relationship between the cam follower and the inner cylinder, and (e) is a front view of the cam follower. [Figure 15] 10A to 10C are a series of explanatory diagrams illustrating the operation of the lid opening and closing mechanism of the embodiment. [Figure 16] 10A to 10C are a series of explanatory diagrams illustrating the operation of the lid opening and closing mechanism of the embodiment. [Figure 17] 10A to 10C are explanatory diagrams illustrating a series of operations for opening and fixing the rotary lid in the embodiment. [Figure 18] 10A to 10C are explanatory diagrams illustrating a series of operations for opening and releasing the rotary lid in the embodiment. [Figure 19]10A and 10B are explanatory diagrams showing the opening and fixing operation of the rotary lid in a modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] A preferred embodiment of the present invention will be described below. In this specification, as shown in Figure 1, the side where the cap C is located is referred to as the upper side of the stamp 1, and the opposite side is referred to as the lower side. Furthermore, the side where the rotary cover 12 is provided is referred to as the front side of the stamp 1, and the opposite side where the operating piece 17 is provided is referred to as the rear side.

[0017] (Overall composition) As shown in Figures 1 to 4, the stamp 1 of this embodiment comprises an inner tube 10, an outer tube 11 that houses the inner tube 10 and is movable relative to the inner tube 10, and a rotating lid 12 that is adapted to open and close in conjunction with the relative movement between the outer tube 11 and the inner tube 10. As shown in Figures 5 and 6, the stamp 1 of this embodiment also comprises a seal holding tube 13 that is disposed inside the inner tube 10 so as to be movable in conjunction with the movement of the outer tube 11. A seal 130 is housed inside the seal holding tube 13 as a printing body (see Figure 6). A compressed coil spring 16 is provided inside the outer tube 11 (see Figure 6), and the elastic force of the coil spring 16 constantly urges the outer tube 11 upward so that it protrudes from the inner tube 10.

[0018] (Outer cylinder) The outer tube 11 constitutes the main body of the stamp 1 and also functions as a handle (grip) when stamping. As shown in FIG. 5, the outer tube 11 of this embodiment has a generally rectangular cylindrical shape overall, with a cylindrical portion 111 with a male thread cut on the outer periphery protruding from its top plate. An adjustment screw S is threaded into the cylindrical portion 111. The adjustment screw S adjusts the vertical position of the seal surface 130a (see FIG. 6) of the seal 130 held in the seal holding tube 13 (adjusting the position of the seal surface 130a will be described later).

[0019] An opening is formed at the base end of the cylindrical portion 111 to form a seal holding tube fitting portion 112 for fitting the upper portion (fitted portion 132) of the seal holding tube 13. As shown in Figure 5, the seal holding tube fitting portions 112 in this embodiment are provided in two locations, one on the front side and one on the rear side of the cylindrical portion 111. In addition, the outer tube 11 in this embodiment is formed with a locking claw 113 for elastically locking the cap C. In addition, as shown in Figures 2 and 5(b), a circular operating piece mounting hole 114 for mounting the operating piece 17 is formed on the back side of the outer tube 11.

[0020] (inner cylinder) The inner tube 10 is a hollow member having a generally rectangular cylindrical shape, as shown in Fig. 5. The inner tube 10 has an opening at its lower end 10a for exposing the stamp surface 130a (see Fig. 6). The upper part of the inner tube 10 is slidably inserted into the lower open part of the outer tube 11.

[0021] As shown in Figure 5, an upper opening 103 is formed in the top plate of inner tube 10, which is adapted to allow seal holder tube 13 to pass through. An open section 101 is formed in the lower front part of inner tube 10, which is adapted to be closed by rotating lid 12. An attachment hole 102 is provided in the side wall of inner tube 10, above open section 101, into which an attachment shaft 123 of rotating lid 12, described below, is fitted. In this embodiment, attachment hole 102 is provided on the front end side of the side wall of inner tube 10.

[0022] An elongated hole 104 (see FIG. 5(b)) is provided on the rear surface of the inner tube 10 to guide a restricting portion 172 (see FIG. 5(a)) provided on the operating piece 17. In this embodiment, the elongated hole 104 is a hole that extends in the vertical direction. The restricting portion 172 inserted into the elongated hole 104 can slide vertically within the elongated hole 104.

[0023] The elongated hole 104 is provided with a locking portion to which the restricting portion 172 is locked. In the embodiment shown in FIG. 5(b), the locking portion is a short horizontal hole formed on the right side of the elongated hole 104 in the drawing, and is provided on both ends of the elongated hole 104 in the vertical direction (upper locking portion 105, lower locking portion 106). In this embodiment, the operation piece 17 is rotated to lock the restricting portion 172 into the locking portion, thereby locking the movement of the outer tube 11 relative to the inner tube 10. This movement locking means will be described later.

[0024] (Seal holding tube) The seal holding tube 13 is housed within the inner tube 10, but is fitted into the outer tube 11 so that it can move in conjunction with the movement of the outer tube 11. As shown in Figure 5, the seal holding tube 13 of this embodiment comprises a cylindrical holder 131 and a seal holding spring FS fixed inside the holder 131, and a seal 130 is attached inside the seal holding spring FS (see Figure 6).

[0025] 6, the seal surface 130a of the seal 130 attached to the holder 131 protrudes downward from the lower end 13a of the holder 131. In addition, the top surface of the seal 130 abuts against the bottom surface of the shaft of the adjustment screw S, and the vertical position of the seal surface 130a can be adjusted by turning the adjustment screw S to move it up and down.

[0026] 5, the holder 131 of this embodiment has a claw-shaped fitting portion 132 that protrudes upward. The fitting portion 132 is inserted into the cylindrical portion 111 of the outer tube 11 from below and engages with the seal holding tube fitting portion 112. This holds the seal holding tube 13 so that it can move in conjunction with the movement of the outer tube 11.

[0027] In this embodiment, a guide protrusion 133 is formed on the front side of the middle part of the holder 131, following the inner peripheral shape of the inner cylinder 10. A cam member 134 is provided below the guide protrusion 133. The cam member 134 in this embodiment has a slope on which a cam follower 124 of the rotating lid 12, which will be described later, can rotate. The shapes and functions of the cam member 134 and the cam follower 124 will be described in detail later.

[0028] (Rotating lid) 5, the rotating lid 12 includes a side plate 121 that closes the open portion 101 of the inner cylinder 10, and a pair of left and right arms 122. A substantially cylindrical mounting shaft 123 is formed to protrude from the rear surface of the tip end of each arm 122.

[0029] The rotating lid 12 has its left and right arms (arms 122) whose tip ends are rotatably held on the left and right side walls of the inner cylinder 10. More specifically, the mounting shafts 123 at the tip of each arm 122 are inserted from the outside into the left and right mounting holes 102 of the inner cylinder 10, respectively (see FIG. 14(d)).

[0030] As shown in Figure 5, a cam follower 124 is integrally provided on the tip surface of each mounting shaft portion 123 in this embodiment. The cam follower 124 protrudes inside the side wall of the inner tube 10 through the mounting hole 102 and contacts and follows the cam member 134 (see Figure 12). In this embodiment, the cam follower 124 and the cam member 134 form a cam mechanism that converts the up and down movement of the outer tube 11 and the seal holding tube 13 into rotation of the rotating lid 12. This cam mechanism causes the rotating lid 12 to rotate in the opening direction as the outer tube 11 moves downward relative to the inner tube 10, and conversely, to rotate in the closing direction as the outer tube 11 moves upward relative to the inner tube 10. The lid opening and closing mechanism, including the cam mechanism, will be described in detail below.

[0031] On the back surface of the rotating lid 12 of the embodiment, a vermilion ink container 14 and a vermilion ink pad 15 held in this vermilion ink container 14 are provided.

[0032] The material for the vermilion ink pad 15 can be, for example, polyolefin fibers made from polyethylene (PE) and polypropylene (PP). The ink impregnated into the vermilion ink pad 15 can be any of pigment, dye, oil, and water-based inks. For example, a quick-drying ink for stamping on hard-to-absorb paper or non-absorbent materials such as coated paper, plastic film, aluminum, or iron can be an oil-based ink made by dissolving and mixing colorants, resins, etc. in a quick-drying solvent.

[0033] The vermilion ink container 14 is preferably removably held in a container holder on the back side of the rotating lid 12. The vermilion ink container 14 of the embodiment is removably attached to the rotating lid 12 and is replaceable.

[0034] When the stamp 1 is not in use, the elastic force of the coil spring 16 causes the outer tube 11 to protrude most from the inner tube 10. At this time, the open portion 101 on the front side of the inner tube 10 is closed by the rotating lid 12, and as shown in Figures 6 and 7, the vermilion ink 15 held in the vermilion ink container 14 on the back side of the rotating lid 12 comes into contact with the seal surface 130a of the seal 130, and ink is supplied to the seal surface 130a.

[0035] When stamping the stamp 1, the outer tube 11 is pressed downward against the resilient force of the coil spring 16, and in response, the rotary lid 12 rotates upward and opens. Then, as shown in Figure 8, when the outer tube 11 moves further downward and reaches a predetermined position, the seal surface 130a of the seal 130 is exposed from the lower end 10a of the inner tube 10 and is pressed against the paper P, enabling stamping. After stamping, when the pressure on the outer tube 11 is released, the resilient force of the coil spring 16 causes the outer tube 11 to move upward, and in response, the rotary lid 12 rotates downward to close the open portion 101 of the inner tube 10.

[0036] (Movement locking means) Here, we will explain the movement locking means that can restrict movement of the outer tube 11 relative to the inner tube 10 in the stamp 1 of this embodiment. The movement locking means of this embodiment includes an operating piece 17 rotatably provided on one side of the outer tube 11, a restricting portion 172 provided on this operating piece 17, an elongated hole 104 provided in the inner tube 10 to guide the restricting portion 172, and locking portions (upper locking portion 105 and lower locking portion 106 in this embodiment) provided on the elongated hole 104.

[0037] As shown in Fig. 5, the operating piece 17 of the embodiment includes a knob portion 171 formed on the front surface (the surface exposed to the outside from the outer tube 11) and a restricting portion 172 formed on the back surface. As shown in Fig. 2, the operating piece 17 is operated by the knob portion 171 protruding outward from an operating piece attachment hole 114 formed on the back surface of the outer tube 11. In the embodiment, the operating piece 17 is unlocked when the knob portion 171 is oriented vertically (see Fig. 2(a)), and is locked when the operating piece 17 is turned so that the knob portion 171 is oriented horizontally (see Fig. 2(b)).

[0038] (Movement locking of the outer cylinder at the initial position) Figure 9(a) is a partially transparent view of the operating piece 17 when the stamp 1 is locked in its unused state (when the outer tube 11 is not pressed downward; hereinafter, the position of the outer tube 11 at this time may be referred to as the "initial position"), as seen from the rear side of the stamp 1. Figure 9(b) shows a cross section taken along the dashed line in Figure 9(a).

[0039] As shown in Figure 9(b), the approximately disk-shaped main body portion of the operating piece 17 is fitted into the operating piece mounting hole 114 of the outer tube 11 and assembled. A knob portion 171 on the front surface of the operating piece 17 protrudes outward from the outer tube 11, and a restricting portion 172 on the back surface of the operating piece 17 engages with the upper engaging portion 105 of the inner tube 10. If an attempt is made to move the outer tube 11 downward relative to the inner tube 10 in this state, the restricting portion 172 interferes with the lower side of the upper engaging portion 105, thereby restricting the downward movement of the outer tube 11. When the outer tube 11 is in the downward movement locked state, the outer tube 11 will not move downward even if an unexpected external force is applied to the outer tube 11. This prevents the stamp 1 from accidentally stamping.

[0040] In the state shown in Figure 9(a), when the operator holds the knob portion 171 and turns the operating piece 17 counterclockwise by 90 degrees, the restricting portion 172 escapes from the upper locking portion 105 and is displaced to a position where it can move up and down within the elongated hole 104, thereby releasing the lock (see Figure 10).

[0041] As shown in Figure 11, when the movement lock at the initial position is released, the outer cylinder 11 can be pressed down against the biasing force of the coil spring 16 to stamp (see Figure 11(c)). After stamping, when the operator turns the operating piece 17, which has returned to the initial position shown in Figure 11(b), clockwise by 90 degrees, it returns to the state shown in Figure 11(a) and is locked again.

[0042] In this embodiment, a locking portion is also formed at the lower end of the elongated hole 104, and by pushing down the outer tube 11 and locking the restricting portion 172 with the lower locking portion 106, the outer tube 11 can be locked in a stamping state in which the stamp surface 130a is exposed from the lower end 10a of the inner tube 10 (see FIG. 11(d)). With this configuration, stamping can be performed continuously without having to push down the outer tube 11 each time.

[0043] (Lid opening / closing mechanism) Next, we will explain the opening and closing mechanism of the rotary lid 12 in the stamp 1 of this embodiment. As mentioned above, the lid opening and closing mechanism of this embodiment opens the rotary lid 12 as the outer tube 11 moves downward, and closes the rotary lid 12 as the outer tube 11 moves upward.

[0044] The lid opening / closing mechanism of this embodiment includes a cam follower 124 provided on the back surface of the tip of the arm portion 122 of the rotating lid 12, and a pair of left and right cam members 134 formed on the lower portion of the seal holding tube 13. Figure 12 shows a part of the rotating lid 12 and a part of the seal holding tube 13 in solid lines, and is a diagram showing a schematic diagram of the positional relationship between the cam follower 124 and the cam member 134. The cam follower 124 protrudes inside the side wall of the inner tube 10 through the mounting hole 102, and the cam member 134 comes into contact with the cam follower 124 to rotate it.

[0045] (cam member) The shape of the cam member 134 of the embodiment will be described. As shown in Figures 13(a) and (b), the cam members 134, 134 of the embodiment are provided on the outer surface of the lower front side of the holder 131 of the seal holding tube 13. The cam members 134 of the embodiment each include a cam plate portion 135 formed long in the vertical direction, and a cam protrusion 136 formed on the lower end side of the cam plate portion 135. The cam protrusion 136 of the embodiment is formed so as to protrude forward at the lower end of the cam plate portion 135.

[0046] 13(b) and 13(c), the cam plate portion 135 of the embodiment includes a first inclined cam surface 135a. The first inclined cam surface 135a of the embodiment shown in Fig. 13(b) is inclined at approximately 45 degrees with respect to the central axis CL along the longitudinal direction of the holder 131. As will be described later, the first inclined cam surface 135a of the embodiment presses the cam follower 124 from above to rotate it in the cover-opening direction.

[0047] Cam plate portion 135 of this embodiment is provided with, from bottom to top, first vertical cam surface 135b, second inclined cam surface 135c, and second vertical cam surface 135d, continuing from first inclined cam surface 135a (see FIGS. 13(b) and 13(c)). Cam plate portion 135 of this embodiment is also provided with horizontal surface 135e below first inclined cam surface 135a, facing first inclined cam surface 135a with a gap between them. Horizontal surface 135e abuts against the underside of cam follower 124, causing cam follower 124 to rotate in the cover-closing direction.

[0048] In this embodiment, the cam protrusion 136 is formed on the front side of the horizontal surface 135e so as to extend diagonally upward. The upper inclined surface 136a of the cam protrusion 136 abuts against the tip of the short side portion 124b of the cam follower 124, causing the cam follower 124 to rotate in the closing direction of the rotating lid 12. The tip portion 136b of the cam protrusion 136 acts as a restricting portion that restricts the movement of the cam follower 124.

[0049] (Cam follower) The shape of the cam follower 124 of the embodiment will be described. As described above, the cam follower 124 of the embodiment is formed to protrude from the mounting shaft portion 123 formed on the back surface of the left and right arm portions 122 (see FIGS. 14(a) to 14(c)). The rotating lid 12 rotates around the mounting shaft portion 123 as a support shaft, and the center of the mounting shaft portion 123 is the rotation center of the rotating lid 12. The cam follower 124 also rotates around the center of the mounting shaft portion 123. Although the cam follower 124 of the embodiment is provided above the center of the mounting shaft portion 123, this is not limiting, and the cam follower 124 may be provided at the center of the mounting shaft portion 123 or below. Furthermore, as described above, when the rotating lid 12 is attached to the mounting hole 102 of the inner tube 12, the cam follower 124 protrudes inward from the side wall of the inner tube 10 (see FIG. 14(d)).

[0050] As shown in FIG. 14(e), the cam follower 124 of this embodiment has a long side portion 124a and a short side portion 124b that are substantially perpendicular to each other, and is formed generally in an L-shape. The upper surface of the long side portion 124a of this embodiment is flat. An obliquely cut-out abutment surface 124c is formed on the upper side (outer corner side) of the corner of the cam follower 124. The abutment surface 124c is rotated by a first inclined cam surface 135a of the cam plate portion 135. Furthermore, the outer surface of the lower end side of the short side portion 124b of this embodiment is a circumferential surface 124d.

[0051] (Operation of the lid opening and closing mechanism) Next, the operation of the lid opening / closing mechanism in this embodiment will be described. Figure 15 shows the operation when opening the rotating lid 12 in a continuous cross section taken along line BB in Figure 14(d). Note that Figure 15 does not show the vermilion ink holder 14 and vermilion ink pad 15 attached to the back side of the rotating lid 12. An enlarged view of the cam follower 124 and its vicinity is shown at the bottom of the figure.

[0052] First, we will explain the operation of opening the rotating lid 12. In the initial position shown in Figure 15(a), the tip of the short side portion 124b of the cam follower 124 abuts against the horizontal surface 135e of the cam plate portion 135. At this time, rotation of the rotating lid 12 in the opening direction is restricted.

[0053] When outer tube 11 is moved downward relative to inner tube 10, seal holding tube 13 also moves downward in conjunction with the downward movement of outer tube 11. As a result, as shown in Figure 15(b), first inclined cam surface 135a of cam member 134 comes into contact with abutment surface 124c of cam follower 124, pushing abutment surface 124c downward and causing cam follower 124 to rotate clockwise in the figure. As cam follower 124 rotates, mounting shaft 123 rotates clockwise in the figure, and rotating lid 12 rotates in the opening direction.

[0054] When the outer cylinder 11 is further pressed down, the corner at the boundary between the first inclined cam surface 135a and the first vertical cam surface 135b abuts against the abutment surface 124c of the cam follower 124, causing the cam follower 124 to rotate further, and as shown in Figure 15(c), the first vertical cam surface 135b abuts against the abutment surface 124c.

[0055] When the outer cylinder 11 is further pressed down, the second inclined cam surface 135c, which is inclined slightly forward, further rotates the cam follower 124 (see FIG. 15(d)). Note that in FIGS. 15(c) and 15(d), the position of the second inclined cam surface 135c is indicated by an auxiliary line (dotted line).

[0056] When the outer cylinder 11 is pushed down to the stamping position, the outer flat surface of the long side portion 124a of the rotated cam follower 124 abuts against the second vertical cam surface 135d, as shown in Figure 15(e). At this time, the rotating lid 12 opens to a position rotated approximately 90 degrees from the closed state, and is in the fully open state.

[0057] Forming two inclined surfaces on the cam plate 135 as in this embodiment is preferable because it can cushion the impact when the rotating lid 12 is opened. The shape of the cam plate 135 is not limited to the configuration of this embodiment, and for example, a second inclined cam surface 135c may be formed continuous with the first inclined cam surface 135a. The cam follower 124 is also not limited to this embodiment, and for example, the position or size of the cam follower 124 may be changed so that the rotating lid 12 opens to an angle of 90 degrees or more in the stamped state shown in Figure 15(e).

[0058] Next, we will explain the movement of the lid opening and closing mechanism when the rotating lid 12 is closed. After stamping, when the operator releases the pressure on the outer tube 11, the outer tube 11 rises due to the biasing force of the coil spring 16. As the outer tube 11 rises, the seal holding tube 13 also rises relative to the inner tube 10.

[0059] In the stamp 1 of this embodiment, the vermilion ink container 14 and the vermilion ink pad 15 (both not shown) are provided on the back side of the rotating lid 12, so that when the rotating lid 12 is open, a force is constantly acting on the rotating lid 12 due to its own weight, tending to rotate it in the closing direction. However, when the outer tube 11 is in the stamping position where it is pressed down to near the bottom end of the inner tube 11 (see Figure 16(a)), the cam follower 124 interferes with the second vertical cam surface 135d of the cam plate portion 135, so the rotation of the rotating lid 12 is restricted.

[0060] 16(a), the second inclined cam surface 135c, which is inclined slightly forward, passes behind the cam follower 124. This creates room for the cam follower 124 to rotate counterclockwise in the figure, and the cam follower 124 rotates counterclockwise in the figure due to the weight of the rotating lid 12.

[0061] The cam follower 124 gradually tilts forward as it rotates counterclockwise in the figure. When the outer cylinder 11 rises to the position shown in Figure 16(b), the rotating lid 12 rotates further in the closing direction due to its own weight, and the first vertical cam surface 135b abuts against the abutment surface 124c of the cam follower 124.

[0062] 16(c), when outer cylinder 11 rises further, cam protrusion 136 is inserted from below into the front side of short side portion 124b of cam follower 124, which is tilted forward. Upper inclined surface 136a of inserted cam protrusion 136 comes into contact with circumferential surface 124d of short side portion 124b of cam follower 124, and rotates cam follower 124 counterclockwise in the figure as it rises.

[0063] As the cam follower 124 rotates counterclockwise in the figure, the rotating lid 12 rotates in the closing direction (see FIG. 16(d)). The outer tube 11 further rises, and the horizontal surface 135e abuts against the short side portion 124b, causing the cam follower 124 to rotate counterclockwise in the figure, and the rotating lid 12 enters the closed state (see FIG. 16(e)). In the stamp 1 of the embodiment, when the rotating lid 12 is closed, the tip portion 136b of the cam protrusion 136 abuts against the underside of the long side portion 124a of the cam follower 124. In this way, in the lid opening / closing mechanism of the embodiment, the rotating lid 12 automatically closes as the outer tube 11 rises.

[0064] (Lid fixing mechanism) The rotary lid 12 of the stamp 1 can be fixed in an open position when the stamp surface 130a is in a non-stamping state with the stamp surface 130a housed in the inner tube 10. This allows the stamp 1 to be easily replaced and also reduces contamination of the surrounding area when replacing parts.

[0065] In this embodiment, the lid opening / closing mechanism has the function of fixing the rotary lid 12 in an open position when the rotary lid 12 is opened beyond a predetermined angle. The lid fixing function of this embodiment will be described below.

[0066] FIG. 17 is a diagram showing the sequence of operations for fixing the rotary lid 12 in the open position in the non-sealing state. Note that hatching has been omitted from the enlarged view of the periphery of the cam follower 124 in FIG. 17. In the initial position shown in FIG. 17(a), the cam follower 124 is oriented so that the long side 124a is substantially horizontal and the short side 124b is positioned on the rear side (right side in the figure). When the outer tube 11 is moved downward from the initial position relative to the inner tube 10, the rotary lid 12 begins to open by the lid opening / closing mechanism, as described above (see FIG. 17(b)). At this time, the seal surface 130a of the seal 130 (not shown) held in the seal holding tube 13 is stored inside the inner tube 10 and is not exposed from the lower end 10a of the inner tube 10.

[0067] While holding the depressed outer tube 11 at a position such that the printing surface 130a is not exposed from the lower end 10a of the inner tube 10, the rotating lid 12 is manually opened as shown in FIG. 17(c). In the stamp 1 of this embodiment, the fully open angle of the rotating lid 12 in the stamping state described above is approximately 90 degrees, but in the non-stamping state, the fully open angle of the rotating lid 12 is greater than 90 degrees. In this embodiment, the rotating lid 12 is held by hand and opened to a position rotated approximately 90 degrees or more from the closed state of the rotating lid 12. When the rotating lid 12 of this embodiment is opened to an opening angle greater than approximately 90 degrees in the non-stamping state, the cam follower 124 tilts backward so that the short side 124b is positioned downward (see FIG. 17(c)).

[0068] Next, with the rotary lid 12 still open more than approximately 90 degrees, the force pushing on the outer tube 11 is released to lift the outer tube 11. As the outer tube 11 lifts, the cam member 134 also lifts, and as shown in Figure 17(d), the tip 136b of the cam protrusion 136 formed on the lower end of the cam member 134 comes into contact with the outside of the short side 124b of the cam follower 124.

[0069] 17(d), corner 136c formed by upper inclined surface 136a and tip end 136b of cam protrusion 136 abuts against outer circumferential surface 124d of short side portion 124b of cam follower 124. At this time, cam protrusion 136, which is attempting to rise, presses cam follower 124 upward, causing a force to act on cam follower 124 that tends to rotate clockwise in the figure (a force that tends to tilt backward) about the center of mounting shaft portion 123. At this time, the tip end of long side portion 124a abuts against cam plate portion 135, restricting cam follower 124 from rotating clockwise in the figure.

[0070] At this time, the force of cam protrusion 136 tending to tilt cam follower 124 backward is greater than the force of cam follower 124 tending to tilt forward due to the weight of rotating lid 12, so cam follower 124 remains stationary in its backward tilted position. This fixes rotating lid 12 in the open position. When rotating lid 12 is fixed in the open position, there is no need to manually open rotating lid 12 when replacing parts such as vermilion ink container 14, making the replacement work easier.

[0071] At this time, the outer tube 11 and the associated seal holding tube 13 attempt to rise due to the biasing force of the coil spring 16, but the cam protrusion 136 interferes with the cam follower 124, restricting the upward movement of the outer tube 11. In this way, when the rotating lid 12 is fixed in the open position, the cam follower 124 and the cam protrusion 136 interfere with each other, locking the movement of the outer tube 11, so that the rotating lid 12 remains open even if the operator releases his or her hand from the outer tube 11.

[0072] In addition, in the stamp 1 of the embodiment, when the rotating lid 12 is fixed in the open position, the printing surface 130a is not exposed from the lower end 10a of the inner tube 10, so that when parts are replaced, contamination of the surrounding area by ink adhering to the printing surface 130a can be prevented.

[0073] In the embodiment shown in FIG. 17(d), the cam protrusion 136 secures the rotating lid 12 at an opening angle θ of approximately 110 degrees. The opening angle θ when the rotating lid 12 is secured is not limited to the angle of this embodiment, but the opening angle θ when secured is preferably 90 degrees or greater. In this embodiment, the cam follower 124 tilts backward when the rotating lid 12 is opened at an opening angle greater than 90 degrees (see FIGS. 17(c) and 17(d)). When the cam follower 124 is tilted backward, the raised cam protrusion 136 does not enter the front of the short side 124b of the cam follower 124, causing the lid to close (see FIG. 16(c)). This makes it easier to securely open and secure the rotating lid 12. Furthermore, when the opening angle θ of the rotating lid 12 is secured, a wider working area is provided for replacing parts such as the vermilion ink dispenser 14, making the work easier and less likely to result in soiling the surrounding area.

[0074] In addition, in this embodiment, the lid opening / closing mechanism has a function of fixing the rotating lid 12 in the open position, so there is no need to operate a separate knob or the like to fix the rotating lid 12, and the rotating lid 12 can be reliably fixed in the open position with minimal effort.

[0075] Next, the procedure for releasing the fixed state of the rotary lid 12 when it is fully open will be described with reference to Figure 18. In Figure 18, hatching is omitted from the enlarged view showing the periphery of the cam follower 124.

[0076] Figure 18(a) shows the state in which the rotating lid 12 is fixed in the open position by the cam protrusion 136. In this example, the rotating lid 12 is fixed at an opening angle θ1 of approximately 110 degrees. When the outer tube 11 is moved downward relative to the inner tube 10 in the fixed state shown in Figure 18(a), the seal holding tube 13 also moves downward as the outer tube 11 moves downward, and the cam protrusion 136 moves away from the cam follower 124, releasing the fixed state of the rotating lid 12 (see Figure 18(b)). When the restriction by the cam protrusion 136 is released, the rotating lid 12 becomes able to rotate in the closing direction.

[0077] 18(c), when the outer cylinder 11 is further moved downward slightly, the rotating lid 12 rotates in the closing direction due to its own weight, and the opening angle θ2 becomes smaller than the opening angle θ1 when fixed. Note that the cam plate portion 135 of this embodiment is formed with a second inclined cam surface 135c that is slightly inclined forward, and when this second inclined cam surface 135c passes behind the cam follower 124 (moves downward), the cam follower 124 is guided to incline forward.

[0078] In this embodiment, when the opening angle θ2 becomes less than 90 degrees, the cam follower 124 tilts forward, and the closing operation shown in Figure 18(d) becomes possible, i.e., the upper inclined surface 136a of the cam protrusion 136 enters the front side of the cam follower 124, and the cam follower 124 rotates in the closing direction.

[0079] As shown in Figure 18(d), when the pressure on outer tube 11 is released after the fixed state of rotating lid 12 is released and the opening angle of rotating lid 12 becomes less than a predetermined angle (less than 90 degrees in this embodiment), outer tube 11 rises due to the biasing force of coil spring 16. As outer tube 11 rises and returns to its initial position, rotating lid 12 closes due to the operation of the lid opening / closing mechanism described above (see Figure 18(e)).

[0080] In this way, if the lid opening / closing mechanism is configured to have the function of fixing the rotating lid 12 in the open position, the rotating lid 12 is automatically released from the open position by moving the outer tube 11 downward, and the opening angle of the rotating lid 12 becomes equal to or less than a predetermined angle due to the weight of the rotating lid 12, causing the cam follower 124 to tilt forward and enabling the cam protrusion 136 to perform the closing operation. In other words, the rotating lid 12 that is fixed in the open position can be released simply by moving the outer tube 11 up and down. This makes it possible to provide a stamp 1 that is easy to release the rotating lid 12 and requires few steps, making it easy to operate.

[0081] In the embodiment shown in Figures 17 and 18, the operator can manually close the rotating lid 12 by holding the rotating lid 12, which is fixed in the open position, and moving it in the closing direction, thereby tilting the cam follower 124 forward against the pressure of the cam protrusion 136.

[0082] (Variation) Although the present invention has been described above by taking the embodiments as examples, the present invention is not limited to the above-described embodiments and can be embodied in various forms.

[0083] For example, as shown in Figure 19(a), the cam follower 124 may be provided below the center of the mounting shaft portion 123. In this example of the stamp 1, when fixing the rotating lid 12 in the open position in the non-stamping state, the rotating lid 12 is manually opened to 90 degrees or more while holding the outer tube 11 in a position lower than the initial position, as in the example shown in Figure 17(c) (see Figure 19(b)).

[0084] Next, while the rotating lid 12 is still open more than 90 degrees, the downward pressure on the outer tube 11 is released, causing the outer tube 11 to rise, and the cam member 134 also rises as the outer tube 11 rises. In this example, as shown in FIG. 19(c), the tip 136b of the raised cam protrusion 136 abuts against the abutment surface 124c of the cam follower 124. In this way, even in a configuration in which the cam protrusion 136 enters the rear side of the cam follower 124, the rotation of the cam follower 124 in the lid closing direction (counterclockwise rotation in the figure) can be restricted, and the rotating lid 12 can be fixed in the open position.

[0085] 19, when the outer tube 11 is moved downward, the engagement between the cam protrusion 136 and the cam follower 124 is released, and the rotating lid 12 is released. After the rotating lid 12 is released, if the pressure on the outer tube 11 is released, the rotating lid 12 will automatically close due to the operation of the lid opening and closing mechanism described above.

[0086] Also, although not shown in the figures, by changing the position and shape of the cam follower 124 and the shape of the cam member 134, for example, it is possible to configure the rotating lid 12 to be fixed in an open position at an opening angle of 90 degrees. [Explanation of symbols]

[0087] 1 seal 10 Inner cylinder 10a Bottom end 101 Open area 102 Mounting hole 104 long hole 105 Upper locking part 106 Lower locking part 11 Outer cylinder 12 Rotating lid 121 Side plate part 122 Arm 123 Mounting shaft 124 Cam follower 124a Long side 124b Short side 124c Abutted surface 124d Circumference 13 Seal holding cylinder 131 Holder 130 Seal 130a Seal face 134 Cam member 135 Cam plate part 135a first inclined cam surface 135b First vertical cam surface 135c Second inclined cam surface 135d Second vertical cam surface 135e horizontal plane 136 Cam protrusion 136a Upper slope 136b Tip 136c Corner 14 Vermilion ink container 15 Vermilion ink 16 Coil spring 17 Operation piece 171 Knob 172 Regulatory Department

Claims

1. A stamp comprising an inner tube, an outer tube that houses the inner tube and is movable up and down relative to the inner tube, a seal holding tube arranged inside the inner tube so as to be linked to the up and down movement of the outer tube, a printing body housed in the seal holding tube, and a rotating lid that opens and closes in linkage with the up and down movement of the outer tube, wherein when the outer tube is moved downwards, the printing surface of the printing body is exposed from the lower end of the inner tube and is in a stamped state, and when the outer tube is moved upwards, the printing surface is housed in the inner tube and is in a non-stamped state; A stamp characterized in that the rotary cover can be fixed in an open position when in a non-sealing state.

2. The stamp includes a lid opening / closing mechanism that opens the rotary lid as the outer cylinder moves downward and closes the rotary lid as the outer cylinder moves upward, 2. The stamp according to claim 1, wherein the cover opening / closing mechanism has a function of fixing the rotary cover in an open position when the rotary cover is opened beyond a predetermined angle.

3. The rotating lid has its left and right arms rotatably held at their tip ends on the left and right side walls of the inner cylinder, The lid opening and closing mechanism is cam followers provided on the rear surfaces of the distal ends of the left and right arms and protruding inward from the side walls; The stamp described in claim 2, characterized in that it is provided with a cam member formed at the lower portion of the seal holding tube and which rotates the cam follower in the opening direction as the outer tube moves downward.

4. The cam member is a cam plate portion and a cam protrusion formed on a lower end side of the cam plate portion, The cam projection is 4. The stamp according to claim 3, wherein the rotary cover is fixed in the open position by engaging with the cam follower to restrict the rotation of the cam follower when the rotary cover is opened to a predetermined angle or more.

5. A stamp as described in claim 4, wherein when the rotating lid is fixed at an opening angle equal to or greater than a predetermined angle, the engagement between the cam protrusion and the cam follower is released by moving the outer tube downward relative to the inner tube.

6. 6. The stamp according to claim 4, wherein the cam projection fixes the rotary cover at an opening angle of 90 degrees or more.

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