JPH04100878U - ribbon cassette - Google Patents

Abstract

(57) [Summary] [Objective] To provide a ribbon cassette which allows a ribbon to easily pass through a back tension structure, facilitates refilling of the ribbon into a cassette, and is structurally simple. [Structure] Consists of a cassette housing provided with a leaf spring and a ribbon holder provided with a ribbon support section. The cassette housing consists of a top plate, a right side outer wall, and a left side outer wall, and slide grooves are formed in both outer walls. The ribbon holder consists of a bottom plate on which the ink ribbon and the ribbon support portion are arranged, and protrusions that are fitted into the slide grooves are formed on the left and right edges of the bottom plate. The ribbon holder and the cassette housing are removably connected to each other via a regulating structure that restricts the ribbon contacting surface of the leaf spring and the ribbon contacting surface of the ribbon support portion from moving toward each other while facing each other.

Description

[Detailed explanation of the idea]

0001

[Industrial technical field]

The present invention includes a pancake-shaped ribbon roll and a ribbon wrapped around the ribbon roll. If the winding core to which the tip of the Both sandwich the ribbon between the ribbon winding body and the winding core from both the inside and outside surfaces. The present invention relates to a ribbon cassette provided with a back tension structure.

0002

[Conventional technology]

Conventionally, this type of ribbon cassette has a ribbon between the ribbon winding body and the winding core. A back tension structure is provided to eliminate slack in the The ribbon structure is designed to sandwich the ribbon from both the inside and outside, making it difficult to wind the ribbon. When tensioning the ribbon from the body to the take-up core, it is passed through the back tension structure. was difficult. Especially in recent years, as ribbons have become extremely thin, As people lose their waist and become difficult to operate with their fingers, this type of back tension The deterioration of workability when threading ribbons into ribbon structures has become significant.

0003 A removable outer case and inner case are provided to simplify the ribbon threading process. An ink ribbon case has been proposed consisting of . The ink ribbon case described in the publication has a drive for driving the ink ribbon. An outer case equipped with a wheel and a pressure contact wheel that contacts the drive wheel, and an ink ribbon. It consists of an inner case. and at least one of the drive wheel or the pressure contact wheel. is movable and can be attached to the inner case by attaching the inner case to the outer case. A pressing means such as a leaf spring biases the movable driving wheel or pressing wheel to It is something that brings people into close contact with each other. According to this ink ribbon case, the ink ribbon is , it rotates between the drive wheel and the pressure contact wheel, which have a relatively large gap before installation. By simply attaching the inner cassette to the outer cassette, the drive wheel or pressure The contact ring moves to obtain the necessary tension, making it easier to replace the ink ribbon. It is said that

0004 However, the ink ribbon case described in the above publication does not include a drive wheel. A method that separates the outer case with the drive mechanism and the inner case that stores the ink ribbon. is adopted. For this reason, the ink ribbon may become loose after combining both cases. It is necessary to correct it by dry operation.

[0005] In addition, the lower part of the outer case is extended to provide a side part that joins with the inner case, and this Both cases are connected by providing a bottom that reinforces the sides. The problem is that the structure is complex.

[0006] In view of these circumstances, the present invention has been developed so that even if it is an extremely thin ribbon, it can be Even users can easily pass the ribbon through the back tension structure This makes it easier to refill the ribbon into the cassette, and also improves the structure. The purpose is to provide a simple ribbon cassette.

[0007]

[Means to solve the problem]

To achieve this purpose, the present invention is designed to store the ink ribbon in a usable position. Store the ribbon holder and the ribbon holder and attach it to the printing device. The cassette housing is made of a separate member, and the leaf spring and ribbon A bag that clamps a ribbon between a supporting part and creates running resistance on the ribbon. A ribbon cassette with a tension structure, (a) the leaf spring is provided on the cassette housing, and the ribbon support portion is provided in the ribbon holder; (b) The cassette housing consists of a top plate, a right side outer wall, and a left side outer wall, with the front Slide grooves with a U-shaped cross section are formed on the right side outer wall and left side outer wall. (c) The ribbon holder has a bottom plate on which the ink ribbon and the ribbon support part are arranged. The cassette housing has a U-shaped cross section on the left and right edges of the bottom plate. A protrusion is formed that fits inside the ride groove, (d) Adjust the attachment/detachment direction of the ribbon holder to the cassette housing to the direction of the leaf spring. A direction in which the ribbon contact surface and the ribbon contact surface of the ribbon support part move toward each other while facing each other. The ribbon holder and the cassette housing are connected to each other through a regulating structure that regulates the ribbon holder and the cassette housing. The structure is such that they are removably joined.

[0008] With this configuration, the ink ribbon can be held by the spring and the ribbon support part. An improved structure that creates back tension by pinching the ink ribbon. a cassette housing for holding the holder, the holder being provided with a ribbon support part; A leaf spring is provided on the housing, and the direction in which the holder is inserted and assembled into the housing is determined by the spring. By regulating the direction in which the ribbon support parts face each other and approach each other, the spring and ribbon support parts can be Inserting the ink ribbon into the narrow gap between the Now you can replace the ink ribbon without performing potentially dangerous operations. It was.

[0009] Moreover, since the surfaces of the leaf spring and the ribbon support part face each other, the ink ribbon can be extended. It does not drag even in the vertical direction.

0010 Also, when the ink ribbon is attached to the ribbon holder, the ink ribbon may become loose. This will prevent the ink ribbon from becoming loose when the cassette housing is installed and removed. Since there is no interference, it can be operated as is after assembly. Also, There is no overlap between the set housing and the ribbon holder, simplifying the structure. I can do it.

[0011] In this way, the present invention overcomes the difficulty of passing a stiff ribbon through an extremely narrow passage. It is now possible to attach a pancake-shaped ribbon into the cassette without any additional work. .

0012

【Example】

Next, the present invention will be explained by giving examples.

[0013] Fig. 1 is a partially cutaway exploded perspective view showing an embodiment of the ribbon cassette of the present invention; Fig. 2 is a partially cutaway plan view of the embodiment shown in FIG. 1, and FIG. 3 is a partially cutaway plan view of the embodiment shown in FIG. FIG. 4 is a longitudinal sectional side view showing a modification example of the embodiment shown in FIG. It is an exploded perspective view.

[0014] The ribbon holder 1 consists of a bottom plate 2, a left side wall 3, a rear side wall 4, and a ribbon support section. It consists of a first ribbon support 6 and another second ribbon support 7.

[0015] The bottom plate 2 has a support shaft 9 that rotatably supports a pancake-shaped ribbon roll 8. A hole 11 is formed in which the lower part of the winding core 10 is rotatably fitted. Ru. Further, on the front and rear edges of the lower surface of the bottom plate 2, a slide groove 12, which is one of the regulating structures, is provided. 13 are formed parallel to each other. Said left side wall 3, rear side wall 4, first ribbon support 6 and the second ribbon support 7 from the bottom plate 2 are the heights of the ribbon roll 8. It is almost equal to or slightly higher. The first ribbon support 6 and the second ribbon support A space A is provided between the print head 7 and the print head 7. child The path of the ribbon stretched over blank space A is the printing location.

[0016] The cassette housing 14 includes a top plate 15 having substantially the same planar shape as the bottom plate 2, and A first front wall 16 facing the first ribbon support 6 and a second front wall facing the second ribbon support 7. It consists of a wall 17, a rear outer wall 18 facing both front walls, and a right outer wall 5.

[0017] The first front wall 16, the second front wall 17 and the rear outer wall 18 are provided with the strips, respectively. Projections 19, 20 and 21 that engage with the ride grooves 12 and 13 are formed.

[0018] A leaf spring 22 is fixed to the inner surface of the first front wall 16.

[0019] In this way, slide the ribbon holder 1 into the cassette housing 14. When assembling, the first ribbon support 6 and the leaf spring are 22, the ribbon contact surfaces approach each other while facing each other, and in the final assembled state The ribbon will be held between these two.

[0020] With the above configuration, the ribbon holder 1 and the cassette housing 14 are separated, the pancake-shaped ribbon roll 8 and the winding core 10 without any troublesome work of passing the ribbon through a narrow passage. It can now be attached to ribbon holder 1. Furthermore, the cassette When assembling with the housing 14, the first ribbon support 6 and the leaf spring 22 are connected. As the ribbon contact surfaces approach each other (on the contrary, ribbon holder 1 and cassette holder When disassembling Uzing 14, it moves away), and the ribbon in the final assembled state. Since the ribbon is held between the two sides, misalignment in the width direction of the ribbon may cause the ribbon to be held. Even in extremely thin ribbons, wrinkles do not occur. moreover, There is no need to perform forced operations that may cause damage to the leaf spring 22.

[0021] In addition, in the embodiment shown in FIG. Id grooves 30, 31, and 32 are formed in the cassette housing 14, and the slide grooves 12 , 13, the protrusions 33, 34, and 35 are fitted into the slide grooves having a U-shaped cross section. They are formed on the front and rear edges of the bottom plate 2, respectively. In this case, the bottom plate 2 and the top plate 15 is determined by the position of the slide groove having a U-shaped cross section. Therefore, the rear side wall 4 is not necessarily required. For this reason, as shown in Figure 1, The structure is simpler than that of .

[0022] Furthermore, in the embodiment shown in FIG. 4, the rear outer wall 18 of the cassette housing 14 is eliminated. , a left side outer wall 36 is added to the cassette housing 14, and this left side outer wall 36 and the right side outer wall Grooves 37 and 38 similar to the slide grooves having a U-shaped cross section are formed in the grooves 5 and 5. Sara The slides having a U-shaped cross section are attached to the left and right edges of the bottom plate 2 of the ribbon holder 1. Projections 39 and 40, which are similar to the projections that are fitted into the cassette groove, are formed. The ribbon holder 1 is assembled from the rear of the housing 14.

[0023]

[Effect of the idea] As explained above, according to the ribbon cassette of the present invention, a leaf spring is provided. It is a method in which only the lid member (cassette housing) is pulled out and divided in the front and back direction. This prevents the cassette housing from becoming loose when it is attached or detached, making it easier to assemble. It can be operated as is after installation.

[0024] Additionally, there is no overlap between the lid member and the ribbon holder, simplifying the structure. I can do it.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway exploded perspective view showing an embodiment of the ribbon cassette of the present invention.

FIG. 2 is a partially cutaway plan view of the embodiment shown in FIG. 1;

FIG. 3 is a longitudinal sectional side view showing a modification of the embodiment shown in FIG. 1;

FIG. 4 is an exploded perspective view showing another modification of the embodiment shown in FIG. 1;

[Explanation of symbols]

1 Ribbon holder 5 Right side outer wall 6 First ribbon support 7 Second ribbon support 8 Ribbon roll 10 Winding core 14 Cassette housing 22 Leaf spring 36 Left side outer wall

Claims (1)

[Scope of utility model registration request] 1. A ribbon holder in which the ink ribbon is stored in a usable position and a cassette housing that stores the ribbon holder and can be attached to a printing device are composed of separate members, and a leaf spring and a ribbon support are used. (a)
the leaf spring is provided on the cassette housing, and the ribbon support portion is provided on the ribbon holder; (b) the cassette housing includes a top plate, a right side outer wall, and a left side outer wall; A slide groove with a U-shaped cross section is formed on the outer wall and the left outer wall, (c)
The ribbon holder includes a bottom plate on which an ink ribbon and a ribbon support portion are arranged, and protrusions are formed on the left and right edges of the bottom plate to be fitted into the U-shaped slide grooves in the cassette housing. (d) via a regulating structure that regulates the direction in which the ribbon holder is attached to and detached from the cassette housing in a direction in which the ribbon contact surface of the leaf spring and the ribbon contact surface of the ribbon support part move toward each other while facing each other; A ribbon cassette characterized in that the ribbon holder and the cassette housing are removably connected.