JP7464306B2 - Coating film transfer tool - Google Patents

Description

The present invention relates to a coating film transfer tool equipped with a transfer tape for application or correction, etc.

Conventionally, there is a coating film transfer tool in which a supply reel and a take-up reel are arranged inside a case that is open at the front end, a transfer head protrudes from the opening, and the transfer tape unwound from the supply reel is reversed at the tip of the transfer head, and then taken up by the take-up reel, which is driven by transmitting the rotational torque of the supply reel via a supply gear and a take-up gear.

In some coating film transfer tools, ratchet teeth are provided on the inner surface of one of the housings as a mechanism for preventing reverse rotation of the transfer tape, which are concentric with the supply gear or the take-up gear and face inward in the radial direction. An opening is provided on the side of the supply gear or the take-up gear, and an arm extending in the circumferential direction is provided within the opening, and a ratchet pawl facing outward in the radial direction that engages with the ratchet teeth is provided at the tip of the arm (see Patent Document 1).

In this conventional technology, the ratchet teeth are molded integrally when the housing is molded. Here, the ridges of the ratchet teeth are provided perpendicular to the inner surface of the housing. This allows the ratchet teeth provided radially inward on the circumference to be tilted relative to the radial direction, allowing the die to be removed. If the ratchet teeth are tilted relative to the radial direction, the ratchet pawl that engages with the ratchet teeth will be difficult to remove when reversed.
Therefore, the height of the ratchet teeth can be made short, and by making the height short, the ratchet noise caused by the ratchet pawl during forward rotation can be reduced.

JP2003-145996

However, in the above-mentioned conventional technology, because the arm extends in the circumferential direction, when force is applied to the ratchet pawl at the end of the arm due to reverse rotation, the arm may distort in the radial direction or in a direction perpendicular to the circumferential direction, causing the arm to deform or the ratchet pawl to fall off the ratchet teeth, which would cause the reverse rotation prevention function to fail.
An object of the present invention is to provide a coating film transfer tool that is capable of reducing ratchet noise and has an improved durability of an anti-reverse mechanism.

The present invention solves the above problems by the following means.
a supply reel on which a transfer tape is wound, a transfer head that transfers a coating film held on the transfer tape to a transfer target portion, a take-up reel that takes up the transfer tape that is unwound from the supply reel and has the coating film transferred to the transfer target portion by the transfer head, a first frame member that is disposed on one side of the supply reel or the take-up reel in the direction of the rotation axis of the supply reel or the take-up reel, an annular protrusion that is provided on the supply reel or the take-up reel side of the first frame member and has ratchet teeth formed in an annular shape around the rotation axis of one of the supply reel or the take-up reel, and a ratchet pawl holder provided at the tip of the arm and having a ratchet pawl that engages with the ratchet teeth to prevent the supply reel from rotating in reverse when the supply reel rotates in reverse; and a ratchet arm holder located on the supply reel or take-up reel side of the ratchet pawl holder and rotating with the one of the reels, wherein the ratchet arm holder and the first frame member limit the movement of the ratchet pawl holder in the thickness direction on the arm.

The present invention also solves the above problems by the following means.
a supply reel on which a transfer tape is wound, a transfer head that transfers the coating film held on the transfer tape to a transfer target portion, a take-up reel that winds up the transfer tape that is unwound from the supply reel and has the coating film transferred to the transfer target portion by the transfer head, a first frame member that is disposed on one side of the supply reel or the take-up reel in the direction of the rotation axis of the supply reel or the take-up reel, and a ring-shaped protrusion that is provided on the first frame member side of the supply reel or the take-up reel and has ratchet teeth formed in a ring shape around the rotation axis of one of the reels, the supply reel or the take-up reel, a ratchet arm holder that rotates together with one of the reels, an arm that is positioned closer to the first frame member than the supply reel or the take-up reel and is restricted in rotation by the first frame member, and extends in a circumferential direction centered on the rotation axis of the one of the reels, and a ratchet pawl holder that is provided at the end of the arm and has a ratchet pawl that engages with the ratchet teeth to prevent the supply reel from rotating in reverse when the supply reel rotates in reverse, wherein the ratchet arm holder and the first frame member limit movement of the arm in the thickness direction.

The ratchet teeth may be formed radially inward.

The ratchet teeth may be provided on the inner surface of the annular projection at regular intervals.

The ratchet arm retainer may be provided with a protrusion, and the movement of the arm in the thickness direction may be limited by the protrusion.

Furthermore, the present invention also solves the above problems by the following means.
a supply reel on which a transfer tape is wound, a transfer head that transfers the coating film held on the transfer tape to a transfer target portion, a take-up reel that winds up the transfer tape that is unwound from the supply reel and has the coating film transferred to the transfer target portion by the transfer head, a first frame member that is disposed on one side of the supply reel or the take-up reel in the direction of the rotation axis of the supply reel or the take-up reel, and a ratchet tooth that faces inward in an annular shape centered on the rotation axis of one of the supply reel or the take-up reel, the first frame member being provided on the supply reel or the take-up reel side. a ratchet pawl holder provided at the tip of the arm and having a ratchet pawl that engages with the ratchet teeth to prevent reverse rotation of the supply reel when the supply reel rotates in reverse, and when the supply reel rotates in reverse, a part of the arm abuts against the ratchet teeth, thereby limiting radial movement of the arm.

The present invention also solves the above problems by the following means.
a supply reel on which a transfer tape is wound, a transfer head that transfers the coating film held on the transfer tape to a transfer target portion, a take-up reel that winds up the transfer tape that is unwound from the supply reel and has the coating film transferred to the transfer target portion by the transfer head, a first frame member that is disposed on one side of the supply reel or the take-up reel in the direction of the rotation axis of the supply reel or the take-up reel, and a ratchet tooth that is provided on the first frame member side of the supply reel or the take-up reel and faces inward in an annular shape centered on the rotation axis of one of the reels, the supply reel or the take-up reel. a ratchet pawl holder provided at the tip of the arm and having a ratchet pawl that engages with the ratchet teeth to prevent reverse rotation of the supply reel when the supply reel rotates in reverse, and wherein when the supply reel rotates in reverse, a part of the arm abuts against the ratchet teeth, thereby restricting radial movement of the arm.

The ratchet pawl holder may be an integral member made of a material that is softer than the member on which the ratchet teeth are provided.

The present invention provides a coating film transfer tool that can reduce ratchet noise and has an improved durability of the anti-reverse mechanism.

FIG. 1 is an exploded perspective view showing a coating film transfer tool 1 according to a first embodiment. FIG. 2 is an exploded perspective view showing only a part of the coating film transfer tool 1, seen from the opposite direction to that of FIG. 1. 13 is a partially enlarged plan view showing the state in which the first frame member 3L and the ratchet pawl retaining ring 23 are engaged with each other, as viewed from the right side. FIG. 2 is a partially enlarged plan view showing the ratchet arm pressing plate 20 and the ratchet pawl retaining ring 23 engaged with each other, as viewed from the left side. FIG. 5 is a cross-sectional perspective view taken along the line B-B of FIG. 4, showing an engagement state between the first frame member 3L, the ratchet pawl retaining ring 23, and the ratchet arm pressing plate 20. FIG. 5 is a cross-sectional perspective view of the ratchet pawl retaining ring 23 taken along the line AA in FIG. 4. FIG. 11 is a partially exploded perspective view of a second embodiment. FIG. 8 is a partially exploded perspective view of FIG. 7 as seen from the opposite direction.

First Embodiment
Hereinafter, a coating film transfer tool 1 according to a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an exploded perspective view showing the coating film transfer tool 1 according to the first embodiment. Fig. 2 is an exploded perspective view showing only a part of the coating film transfer tool 1 as seen from the opposite direction to Fig. 1.
Hereinafter, the left and right, front and back, and top and bottom when a user holds the coating film transfer tool 1 in his or her hand during use will be referred to as left and right, front and back, and top and bottom in the specification.
The coating film transfer tool 1 transfers the coating film onto the portion to be transferred by pressing a transfer head 5 protruding from an opening 2a provided on the front side of a housing 2 against the portion to be transferred below and moving it backward.

The coating film transfer tool 1 comprises a housing 2 consisting of a pair of left and right housing members 2L, 2R, each of which is approximately elliptical in shape, and a frame body 3 consisting of a pair of left and right frame members 3L and 3R, arranged inside the housing 2.
Between the first frame member 3L and the second frame member 3R, there are arranged a supply reel 4 on which transfer tape 4T is wound, a transfer head 5 which transfers the transfer tape 4T pulled out from the supply reel 4 onto the transferred portion, and a take-up reel 6 which takes up the transfer tape 4T after transfer.

(Rotational force transmission mechanism)
A supply reel spindle 8 having a locking portion 8a at one end thereof is provided on the inner surface of the right-side housing member 2R so as to stand toward the left.
A supply reel gear 7 is inserted into the supply reel spindle 8. The supply reel gear 7 is equipped with a cylindrical rotating shaft 7b having a locking portion 7a at one end. A compression spring 9, an annular first spacer 10, an annular rotational force transmission ring 11, and an annular second spacer 12 are fitted onto the rotating shaft 7b in this order, and the second spacer 12 is locked to the locking portion 7a, thereby preventing the compression spring 9, the first spacer 10, the rotational force transmission ring 11, and the second spacer 12 from coming off.
The rotating shaft 7 b is inserted into the supply reel support shaft 8 and is prevented from coming off by a locking portion 8 a, and the supply reel gear 7 is rotatably held on the supply reel support shaft 8 .

The outer peripheral surface of the rotational force transmission ring 11 is provided with a locking protrusion 11a. On the other hand, the inner peripheral surface of the supply reel 4 is provided with a rib-shaped locking portion 4a to which the locking protrusion 11a locks. When the locking protrusion 11a locks with the rib-shaped locking portion 4a, the rotational force transmission ring 11 rotates integrally with the supply reel 4.

The left half of the rotating shaft 7b of the supply reel gear 7 has its outer periphery cut at approximately equal intervals to form four flat surfaces 7c. Meanwhile, the inner holes 10a, 12a of the first spacer 10 and the second spacer 12 are quadrilaterals with arc-shaped corners in plan view. As a result, the first spacer 10 and the second spacer 12 are non-rotatably fitted to the rotating shaft 7b of the supply reel gear 7, and the supply reel gear 7, compression spring 9, first spacer 10, and second spacer 12 rotate together.

When the supply reel 4 rotates, the torque transmission ring 11 rotates, and the friction between the torque transmission ring 11 and the first spacer 10 and the second spacer 12 causes the first spacer 10 and the second spacer 12 to rotate, and together with this, the supply reel gear 7 rotates.

(Transfer head 5)
The transfer head 5 is a part that transfers the transfer tape 4T pulled out from the supply reel 4 onto a transferred portion, and has a hole 5a at the rear into which a head holding member shaft 17a is inserted. By inserting the head holding member shaft 17a of the head holding member 17 described below into the hole 5a, the transfer head 5 is held so as to be swingable around the head holding member shaft 17a.

(Take-up reel 6)
The take-up reel 6 is pivotally supported on a take-up reel spindle 13 that is erected on the housing member 2R. A take-up reel gear (not shown in FIG. 1 because the right end is not visible) is provided on the right end of the take-up reel 6. Transmission gears 15a, 15b are provided between the supply reel gear 7 and the take-up reel spindle 13, and when the take-up reel 6 is attached to the take-up reel spindle 13, the supply reel gear 7, the transmission gears 15a, 15b, and the take-up reel gear mesh with each other.

When the transfer tape 4T is unwound during the transfer operation, the supply reel 4 rotates. When the supply reel 4 rotates, the rotational force transmission ring 11 rotates. When the rotational force transmission ring 11 rotates, the first spacer 10 and the second spacer 12, which are pressed against the rotational force transmission ring 11 by the compression spring 9, also rotate, and the supply reel gear 7 rotates due to the rotational force. When the supply reel gear 7 rotates, the rotational force is transmitted to the transmission gears 15a, 15b and the take-up reel gear, and the take-up reel 6 rotates.

Between the pair of left and right frame members 3R, 3L, in addition to the supply reel 4, transfer head 5, and take-up reel 6 described above, there are arranged a ratchet pawl retaining ring (ratchet pawl retaining body) 23, a ratchet arm pressing plate 20, and a head retaining member 17, and a circular protrusion (annular protrusion) 35 is provided on the inner surface of the first frame member 3L.

Support pillars 32a, 32b, and 32c are provided upright on the first frame member 3L, while support pillars 31a, 31b, and 31c are provided upright on the second frame member 3R, with which the support pillars 32a, 32b, and 32c engage, respectively.
When the frame members 3R, 3L are opposed to each other and pressed toward each other, the supports 32a, 32b, 32c engage with the supports 31a, 31b, 31c, respectively, connecting the frame members 3R, 3L to form the frame 3.

(Head holding member 17)
The head retaining member 17 is a member that is positioned in front of the frame body 3 and has wall portions 17L, 17R provided on the left and right sides, a head retaining member shaft 17a that is positioned at the tip, a shaft insertion hole 17e that penetrates the front of the wall portions 17L, 17R, a pillar insertion hole 17b that penetrates the wall portion 17L, and a locking claw 17d that is positioned at the upper rear part of the right surface of the wall portion 17L.

(Head holding member shaft 17a)
As described above, the transfer head 5 has the hole 5a journaled by the head holding member shaft 17a, and is held to be swingable about the head holding member shaft 17a relative to the head holding member 17.

(Support shaft insertion hole 17e)
A support post 32d erected on the first frame member 3L is inserted into the support shaft insertion hole 17e.

(Support insertion hole 17b)
The left wall 17L extends further rearward than the right wall 17R, and a post insertion hole 17b is provided in the left wall 17L at a portion rearward of the right wall 17R. The post insertion hole 17b is an elongated hole, and by inserting a post 32a erected on the first frame member 3L therethrough, the head holding member 17 can rotate within a predetermined range with the post 32d as the center of rotation.

(Latching claw 17d)
The locking pawl 17d is a rotation stopping portion for stopping the rotation of the supply reel 4, and engages with a locking tooth 20a of a ratchet arm pressing plate 20 which will be described next.

(Ratchet arm retainer plate 20)
The ratchet arm pressing plate (ratchet arm pressing portion) 20 is a disk member arranged on the left side of the supply reel 4, with an opening in the center and an engagement portion 20b that protrudes radially inwardly on the inner circumferential surface of the opening 20e.
A locking tooth 20a, which engages with the locking pawl 17d, is integrally attached to the circumferential edge of the outer periphery of the left surface of the ratchet arm pressing plate 20.
Three projections 20d of the same shape are provided at three locations immediately outside the edge of the opening 20e on the left surface (the side surface of the ratchet pawl holding ring 23) of the ratchet arm pressing plate 20. The three projections 20d are provided at approximately equal angles with respect to the center of the ratchet arm pressing plate 20.
A fixed claw 20c is provided on the right surface (the side surface of the supply reel 4) of the ratchet arm presser plate 20. The fixed claw 20c engages with a fixed claw engagement hole 4b formed on the left surface (the surface on the ratchet arm presser plate 20 side) of the supply reel 4, whereby the ratchet arm presser plate 20 is fixed to the supply reel 4 and rotates together with the supply reel 4.

(Spring member 21)
A spring holding portion 17c is provided behind the right wall portion 17R of the head holding member 17. Meanwhile, a spring holding portion 33 to which the other end of the spring member 21 is fixed is provided on the second frame member 3R. When the spring member 21 is attached between the spring holding portion 17c and the spring holding portion 33, the spring member 21 biases the head holding member 17 in a direction in which the locking claw 17d of the head holding member 17 engages with the locking tooth 20a of the ratchet arm presser plate 20.

(Anti-rotation mechanism)
When the coating film transfer tool 1 is not in use, the locking pawl 17d is biased in the direction of non-use as shown by the arrow in Figure 1, whereby the locking pawl 17d engages with the locking tooth 20a of the ratchet arm presser plate 20, preventing rotation of the supply reel 4, which rotates integrally with the ratchet arm presser plate 20.

On the other hand, when the coating film transfer tool 1 is in use, when the transfer head 5 is pressed against the part to be transferred, the head holding member 17 moves in the direction of use as indicated by the arrow to the position of the locking claw 17d in FIG. 1. This releases the lock between the locking tooth 20a of the ratchet arm pressing plate 20 and the locking claw 17d, allowing the supply reel 4 to rotate and the transfer tape 4T wound on the supply reel 4 to be pulled out.

(Reverse prevention mechanism)
3 is a partially enlarged plan view from the right side showing the state in which the first frame member 3L and the ratchet pawl holding ring 23 are engaged. FIG. 4 is a partially enlarged plan view from the left side showing the state in which the ratchet arm pressing plate 20 and the ratchet pawl holding ring 23 are engaged. FIG. 5 is a cross-sectional perspective view taken along line B-B in FIG. 4, showing the state in which the first frame member 3L, the ratchet pawl holding ring 23, and the ratchet arm pressing plate 20 are engaged. FIG. 6 is a cross-sectional perspective view taken along line A-A in FIG. 4 of the ratchet pawl holding ring 23. The arrow r in FIG. 3 and FIG. 4 indicates the forward rotation direction of the supply reel 4, i.e., the ratchet pawl holding ring 23. The forward rotation direction is the rotation direction of the supply reel 4 when the coating film of the transfer tape 4T is transferred to the transfer target portion using the coating film transfer tool 1.

(Ratchet teeth 36)
A shaft portion 34 and an annular protrusion 35 of a predetermined diameter centered on the shaft portion 34 are integrally provided on the right surface (inner surface) of the first frame member 3L at a position corresponding to the supply reel spindle 8. Ratchet teeth 36 protruding toward the inner diameter side are provided on the inner surface of the annular protrusion 35. The ratchet teeth 36 are not provided on the entire circumference of the annular protrusion 35, but are provided at equal intervals with gaps between them. The number of ratchet teeth 36 is the minimum necessary, and is eight in this embodiment.
The ratchet teeth 36 are mountain-shaped, with a gentle inclination on the rear side in the r direction and a steeper inclination on the front side in the r direction than on the rear side in the r direction. In this embodiment, the inclination on the front side in the r direction is approximately 90 degrees.
Here, the ridgeline of the ratchet teeth 36 is provided perpendicular to the inner surface of the first frame member 3L. Therefore, when manufacturing the first frame member 3L using a mold, even if the front side in the r direction of the ratchet teeth 36 provided radially inward on the circumference is at an angle of 90 degrees or more, the mold can be removed.

(Ratchet pawl retaining ring 23)
The ratchet pawl retaining ring 23 is disposed between the first frame member 3L and the ratchet arm retaining plate 20.

(Cylindrical portion 23a)
The ratchet pawl retaining ring 23 has a tubular portion 23a at the center of the disc member, through which the shaft portion 34 of the first frame member 3L is inserted. A notch 23b is provided at the tip of the tubular portion 23a, and the notch 23b engages with the engaging portion 20b of the ratchet arm pressing plate 20, so that the ratchet pawl retaining ring 23 rotates together with the ratchet arm pressing plate 20, i.e., the supply reel 4.
In this way, by making the shaft portion 34 of the member (first frame member 3L) having the ratchet teeth 36 and the tubular portion 23a of the member (ratchet pawl retaining ring 23) having the ratchet pawl 23i rotatable coaxially (without any other parts in between), rattle is reduced and the accuracy of the ratchet structure between the ratchet pawl 23i and the ratchet teeth 36 can be improved.

(First opening 23f, second opening 23e)
A first opening 23f and a second opening 23e, each of which is substantially sector-shaped, are formed on the outer periphery of the cylindrical portion 23a of the ratchet pawl retaining ring 23. The first opening 23f has an opening angle of 180 degrees or more from the central axis. The second opening 23e has an opening angle smaller than that of the first opening 23f, which is about 30 degrees in this embodiment.
The first opening 23f is formed by two radially extending walls, and an inner diameter side wall and an outer diameter side wall extending in the circumferential direction. The second opening 23e is provided at a substantially equal position from both of the two radially extending walls of the first opening 23f.

(Arm 23g)
The arm 23g extends through the first opening 23f. Specifically, the arm 23g extends in an arc shape in the opposite direction to the circumferential direction from the sidewall 23c, which is the front side in the r direction of the two walls extending radially through the first opening 23f. The arm 23g extends to just before the sidewall 23d, which is the rear side in the r direction.

(Relationship between arm 23g and protrusion 20d)
As described above, the three projections 20d are provided at approximately equal angles with respect to the center of the ratchet arm pressing plate 20. As shown in Fig. 4, when the ratchet pawl holding ring 23 is disposed on the left side of the ratchet arm pressing plate 20, if one of the projections 20d of the ratchet arm pressing plate 20 is positioned at the second opening 23e of the ratchet pawl holding ring 23, two of the projections 20d of the ratchet arm pressing plate 20 are positioned at positions in the first opening 23f of the ratchet pawl holding ring 23 that correspond to the start and tip ends of the arm 23g.

(Ratchet claw 23i)
The arm 23g has a tip end provided with a ratchet pawl 23i that protrudes slightly radially outward and has a pointed tip. The ratchet pawl 23i is elastically biased radially outward (toward the inner surface of the annular projection 35) by the arm 23g.

(Thick portion 23h)
The arm 23g is provided with a thick portion 23h that is thicker in the radial direction. The thick portion 23h is provided at the center of the arm 23g at a position that first comes into contact with one of the ratchet teeth 36 (ratchet teeth 36a in FIG. 4) when the ratchet pawl 23i is pushed by the ratchet teeth 36 during reverse rotation and the center of the arm 23g moves outward in the radial direction.
However, the thick portion 23h does not have to be provided, and if the thick portion 23h is not provided, when the ratchet pawl 23i is pressed by the ratchet teeth 36 during reverse rotation and the central portion of the arm 23g moves radially outward, a part of the arm 23g that does not have a thick portion will first come into contact with the ratchet teeth 36 (ratchet teeth 36a in Figure 4).

Unlike the present embodiment, conventionally, it is common to provide a ratchet pawl for preventing reverse rotation on the supply reel and the take-up reel. However, from a functional standpoint, the supply reel and the take-up reel must be made of a hard material. For this reason, conventionally, the ratchet pawl is also made of a hard material.
However, in the embodiment, the supply reel 4 and the take-up reel 6 are separate from the ratchet pawl retaining ring 23 having the ratchet pawl 23i. This makes it possible to individually select a material suitable for each. Therefore, in the embodiment, the ratchet pawl retaining ring 23 is formed of a material that is softer than other components such as the ratchet teeth 36, i.e., the first frame member 3L, the supply reel 4, and the take-up reel 6.
Furthermore, since the outer periphery of the arm 23g is covered by the ratchet pawl retaining ring 23, it does not come into direct contact with other parts or assembly jigs during molding or assembly, thereby preventing deformation of the arm 23g.

(Forward rotation)
In an embodiment, when the ratchet pawl retaining ring 23 rotates in the r direction, the radially outer surface of the ratchet pawl 23i moves along the gently sloping surface of the ratchet teeth 36, and when the arm 23g elastically deforms and overcomes the ratchet teeth 36, the elastically deformed arm 23g moves due to recoil (restoring force, biasing force) to the inner surface of the outer diameter side annular protrusion 35 where the ratchet teeth 36 are not provided.

At this time, a small gap is provided so that the ratchet pawl 23i does not collide with the inner surface on which the ratchet teeth 36 are not provided, thereby reducing the generation of ratchet noise. In this specification, ratchet noise includes not only the sound generated by the collision between the ratchet pawl 23i and the ratchet teeth 36, but also sounds generated by the ratchet function, such as sounds generated by flicking the ratchet pawl and sounds generated by the collision between the ratchet pawl 23i and a member other than the ratchet teeth 36.

Furthermore, the ratchet pawl 23i (arm 23g, ratchet pawl retaining ring 23) is made of a flexible material. Therefore, even if a ratchet sound occurs, its volume can be reduced.

Furthermore, by making the arc-shaped arm 23g longer (i.e., by increasing the central angle of the arc), the rigidity is weakened, which also reduces the volume of the ratchet noise. The central angle of the arc of the arc-shaped arm 23g is preferably 90 degrees or more, and more preferably 120 degrees or more. In this embodiment, it is formed to be about 180 degrees.
Furthermore, with this configuration, not only can the ratchet noise be reduced, but the rotational resistance due to the reverse rotation prevention mechanism can also be reduced, making it possible to transfer with a lighter force.

The ratchet teeth 36 are not provided all over the circumference of the annular protrusion 35, but are provided in the minimum number necessary with gaps between them. This also reduces the number of ratchet noises that occur.

(Reverse)
When the ratchet pawl holding ring 23 rotates in the direction opposite to the direction r, as shown in FIG. 4, the ratchet pawl 23i bites into the steeply inclined surfaces of the ratchet teeth 36, and the movement of the ratchet pawl 23i in the direction opposite to the direction r is restricted.
However, as described above, in the embodiment, the ratchet pawl holding ring 23 is made of a flexible material in order to reduce the ratchet noise caused by the ratchet pawl 23i and the ratchet teeth 36. Furthermore, in the embodiment, the arm 23g is formed in a long arc shape with a central angle of about 180 degrees. This reduces the rigidity of the arm 23g, making the arm 23g more susceptible to deformation, and there is a possibility that the arm 23g may be deformed and bent.

(Deformation in the thickness direction)
Here, as shown in Fig. 5, the protrusion 20d provided on the ratchet arm pressing plate 20 is provided adjacent to the right side of the arm 23g with a small gap therebetween that does not come into contact during forward rotation. When the arm 23g deforms to the right, it comes into contact with the protrusion 20d provided on the ratchet arm pressing plate 20, preventing the arm 23g from deforming excessively to the right. It is preferable that the size of the axial gap between the ratchet arm pressing portion that restricts deformation in the thickness direction of the arm 23g and the ratchet teeth 36 is smaller than the thickness of the ratchet pawl 23i. With this configuration, tooth skipping of the ratchet pawl 23i is reliably prevented.

5, the right surface (inner surface) of the first frame member 3L is disposed on the left side of the arm 23g. When the arm 23g deforms to the left, it comes into contact with the right surface of the first frame member 3L, preventing the arm 23g from deforming excessively to the left.
In this manner, deformation of the arm 23g in the left-right direction (thickness direction) is prevented, and irreversible deformation of the arm 23g is prevented, while tooth skipping of the ratchet pawl 23i is also prevented.

(Radial deformation)
Due to the deformation of the arm 23g, the center portion of the arm 23g may move radially outward as indicated by the arrow f in Fig. 4. Here, the arm 23g and the ratchet teeth 36a are formed so as to be disposed approximately concentrically, and the radial gap between the arm 23g and the ratchet teeth 36a is small.
Therefore, when the center portion of the arm 23g moves radially outward, the center portion of the arm 23g comes into contact with the ratchet teeth 36a, restricting the radially outward movement of the arm 23g. Furthermore, when the arm 23g comes into contact with a plurality of ratchet teeth (three in the first embodiment), the force applied to the arm 23g is dispersed, so that the arm 23g is less likely to bend even when pressed by the ratchet teeth 36. Therefore, irreversible deformation of the arm 23g during reverse rotation is prevented.

In the embodiment, the arm 23g has a thick portion 23h at its center, and when the arm 23g moves radially outward, the thick portion 23h comes into contact with the ratchet teeth 36a first, thereby further preventing irreversible deformation of the arm 23g during reverse rotation.
However, as described above, even if the thick portion 23h is not provided, a part of the arm 23g that does not have a thick portion first comes into contact with the ratchet teeth 36 (ratchet teeth 36a in Figure 4), so that the effect of preventing irreversible deformation can be obtained.

Second Embodiment
Next, a second embodiment of the present invention will be described. Fig. 7 is a partially exploded perspective view of a coating film transfer tool according to the second embodiment. Fig. 8 is a partially exploded perspective view of Fig. 7 viewed from the opposite direction. The second embodiment differs from the first embodiment in the following respects. In the following description, the description of the same parts as in the first embodiment will be omitted. Also, parts having the same functions as in the first embodiment will be given reference numbers obtained by adding 100 to the reference numbers in the first embodiment.

(First frame member 103L)
In the first embodiment, the ratchet arm pressing plate 20 is open at the center, and the inner peripheral surface of the opening 20e is provided with the engagement portion 20b that protrudes radially inward. Furthermore, the same shaped projections 20d are provided at three locations immediately outside the edge of the opening 20e.
However, in the second embodiment, a circular protrusion 120e is formed on the right surface (the side surface of the ratchet pawl retaining ring 123) of the first frame member 103L, and an engagement portion 120b that protrudes radially inward is provided on the inner circumferential surface of the circular protrusion 120e.
Furthermore, protrusions 120d of the same shape are provided at three positions on the right surface (the side surface of the ratchet pawl holding ring 123) of the ring-shaped protrusion 120e at equal angles to each other.

(Ratchet pawl retaining ring 123)
The ratchet pawl retaining ring 123 has the same shape as in the first embodiment and is disposed between the first frame member 103L and the ratchet arm pressing plate 120, but is oriented in the opposite direction to that in the first embodiment, i.e., the cylindrical portion 123a faces the first frame member 103L. A notch 123b is provided at the tip of the cylindrical portion 123a, and the notch 123b engages with the engaging portion 120b of the first frame member 103L, fixing the ratchet pawl retaining ring 123 to the first frame member 103L. An arm 123g extends through a first opening 123f of the ratchet pawl retaining ring 123, and a ratchet pawl 123i is provided at the tip of the arm 123g facing counterclockwise (in the direction of the arrow r) in FIG.

(Ratchet arm holding plate 120)
In the first embodiment, an axis portion 34 and an annular protrusion 35 of a predetermined diameter centered on the axis portion 34 are provided on the right surface of the first frame member 3L, and ratchet teeth 36 protruding toward the inner diameter side are provided on the inner surface of the annular protrusion 35.
However, in the second embodiment, a shaft portion 134 and an annular projection 135 of a predetermined diameter centered on the shaft portion 134 are integrally provided on the left surface of the ratchet arm presser plate 120. Ratchet teeth 136 protruding toward the inner diameter side are provided on the inner surface of the annular projection 135. As shown in Figure 7, the ratchet teeth 136 are mountain-shaped, with a gentle slope on the front side in the direction of travel of the arrow r and a steeper slope on the rear side in the direction r than on the front side in the direction r.

(Forward rotation)
In the second embodiment, when the ratchet arm pressing plate 120 rotates in the r direction, the radially outer surface of the ratchet pawl 123i moves along the gently sloping surface of the ratchet tooth 136, and when the arm 123g elastically deforms and overcomes the ratchet tooth 136, the elastically deformed arm 123g moves due to the recoil (restoring force, biasing force) to the inner surface of the outer diameter side annular protrusion 135 where the ratchet teeth 136 are not provided.
In the second embodiment, as in the first embodiment, a small gap is provided to prevent collision between the ratchet pawl 123i and the inner surface on which the ratchet teeth 136 are not provided, thereby reducing the possibility of ratchet noise occurring.
Furthermore, the ratchet pawl 123i (the arm 123g and the ratchet pawl holding ring 123) is made of a flexible material, so that even if a ratchet noise occurs, the volume of the noise can be reduced.
Furthermore, by making the arc-shaped arm 123g longer (i.e., increasing the central angle of the arc), the rigidity is weakened, which also makes it possible to reduce the volume of the ratchet noise.
Furthermore, with this configuration, not only can the ratchet noise be reduced, but the rotational resistance due to the reverse rotation prevention mechanism can also be reduced, making it possible to transfer with a lighter force.

In addition, the ratchet teeth 136 are not provided on the entire circumference of the annular protrusion 135, but are provided in the minimum number necessary with gaps between them. This also reduces the number of times the ratchet sound occurs.

(Reverse)
If the ratchet pawl retaining ring 123 rotates in the direction opposite to the direction r, the arm 123g may be deformed and bent, as in the first embodiment.

However, the left side of the arm 123g is adjacent to the protrusion 120d provided on the first frame member 103L with a small gap therebetween so that they do not come into contact during forward rotation. When the arm 123g deforms leftward, it comes into contact with the protrusion 120d provided on the first frame member 103L, preventing the arm 123g from deforming excessively to the left.
Further, the left surface (inner surface) of the ratchet arm pressing plate 120 is disposed on the right side of the arm 23g. When the arm 123g is deformed to the right, it comes into contact with the left surface of the ratchet arm pressing plate 120, thereby preventing the arm 123g from being deformed excessively to the right.
In this way, deformation of the arm 123g in the left-right direction (thickness direction) is prevented, and irreversible deformation of the arm 123g is prevented, and tooth skipping of the ratchet pawl 123i is also prevented.

The above describes a preferred embodiment of the present invention, but the present invention is not limited to this and various modifications are possible. For example, the left and right described above may be reversed. Also, the reverse rotation prevention mechanism may be provided coaxially with the take-up reel.

In the embodiment, the cartridge is of a refillable type, but the present invention is not limited to this and may be of a disposable type that cannot be refilled. In the case of a disposable type, for example, the first frame member is not separate from the first housing member, and the second frame member is not separate from the second housing member, but each may be a single member.

In the first embodiment, a protrusion 20d is provided on the ratchet arm pressing plate 20 as the ratchet arm pressing portion, and the protrusion 20d presses the arm 23g. However, this is not limited to this, and the arm 23g may be pressed by the surface of the ratchet arm pressing plate 20 without providing the protrusion 20d.

In the first embodiment, the ratchet arm pressing portion does not have to be a separate member from the take-up reel 6 or the supply reel 4, but may be formed integrally with the take-up reel 6 or the supply reel 4.
In the second embodiment, the ratchet teeth do not have to be separate members from the take-up reel 6 or the supply reel 4, but may be formed integrally with the take-up reel 6 or the supply reel 4.

In the first and second embodiments, the ratchet pawl holder is configured with a disc-shaped ratchet pawl holder ring 23, 123, but this is not limited to this and may be configured with other shapes.

In the embodiment, the annular protrusion is formed in a circular ring shape with an inner peripheral surface and an outer peripheral surface, but this is not limited to this. In other words, it is sufficient that the surface on the side where the ratchet pawl is formed (the inner peripheral surface or the outer peripheral surface) is formed in a circular shape.

REFERENCE SIGNS LIST 1 Coating film transfer tool 2 Housing 2L Housing member 2R Housing member 2a Opening 3 Frame 3L First frame member 3R Second frame member 4 Supply reel 4T Transfer tape 4a Rib-shaped engaging portion 4b Fixed claw engagement hole 5 Transfer head 5a Hole portion 6 Take-up reel 7 Supply reel gear 17 Head holding member 20 Ratchet arm pressing plate (ratchet arm pressing portion)
20a: locking tooth 20b: engagement portion 20c: fixed pawl 20d: protrusion 20e: opening 21: spring member 23: ratchet pawl retaining ring (ratchet pawl retaining body)
23a Tube portion 23b Notch 23c Side wall 23d Side wall 23e Second opening 23f First opening 23g Arm 23h Thick portion 23i Ratchet claw 33 Spring holding portion 34 Shaft portion 35 Annular protrusion (annular protrusion)
36 ratchet teeth

Claims (8)

A supply reel on which transfer tape is wound;
A transfer head that transfers the coating film held on the transfer tape to a transfer target;
a take-up reel that winds up the transfer tape after the transfer head transfers the coating film to the transfer target portion and that is linked to the supply reel;
a first frame member disposed in one of the supply reel and the take-up reel in the axial direction of the rotation of the reel,
Between the first frame member and the supply reel or the take-up reel,
an annular projection formed in an annular shape around a rotation axis of one of the supply reel or the take-up reel, the annular projection having a plurality of ratchet teeth on an inner surface thereof extending radially inward at regular intervals;
an arm extending in a circumferential direction about the rotation axis of the one reel and protruding radially outward, the arm having a ratchet pawl at its tip that meshes with the ratchet teeth to prevent the one reel from rotating in the reverse direction when the one reel rotates in the reverse direction;
Either the annular projection or the arm rotates together with the one reel ,
When the one reel rotates in the reverse direction, a part of the arm other than the ratchet pawl comes into contact with the ratchet teeth, thereby restricting radial movement of the arm.
Coating film transfer tool. The arm and the ratchet teeth are arranged on substantially concentric circles at overlapping positions in the rotation axis direction.
The coating film transfer tool according to claim 1 a member having the annular protrusion is disposed on one side of the arm in the direction of the rotation axis of the one reel, and a ratchet arm pressing portion for restricting extreme deformation of the arm in the direction of the rotation axis is disposed on the other side of the arm;
The coating film transfer tool according to claim 1 or 2 . A supply reel on which transfer tape is wound;
A transfer head that transfers the coating film held on the transfer tape to a transfer target;
a take-up reel that winds up the transfer tape after the transfer head transfers the coating film to the transfer target portion and that is linked to the supply reel;
a first frame member disposed in one of the supply reel and the take-up reel in the axial direction of the rotation of the reel,
Between the first frame member and the supply reel or the take-up reel,
an annular projection formed in an annular shape around a rotation axis of one of the supply reel or the take-up reel, the annular projection having a plurality of ratchet teeth on an inner surface thereof extending radially inward at regular intervals;
an arm extending in a circumferential direction about the rotation axis of the one reel and protruding radially outward, the arm having a ratchet pawl at its tip that meshes with the ratchet teeth to prevent the one reel from rotating in the reverse direction when the one reel rotates in the reverse direction;
Either the annular projection or the arm rotates together with the one reel,
a member having the annular protrusion is disposed on one side of the arm in the direction of the rotation axis of the one reel, and a ratchet arm pressing portion for restricting extreme deformation of the arm in the direction of the rotation axis is disposed on the other side of the arm ;
Coating film transfer tool. The ratchet arm pressing portion is provided with a protrusion that comes into contact with the arm when the arm rotates in the direction of the rotation axis.
The coating film transfer tool according to claim 3 or 4 . The size of the axial gap between the ratchet arm pressing portion and the ratchet teeth is smaller than the thickness of the ratchet pawl.
The coating film transfer tool according to any one of claims 3 to 5 . A gap is provided between the ratchet pawl and an inner surface of a portion of the annular projection where the ratchet teeth are not provided.
The coating film transfer tool according to any one of claims 1 to 6 . The arm is an arc having a central angle of 90 degrees or more.
The coating film transfer tool according to any one of claims 1 to 7 .

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