JPH04120061U - Print head mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a print head with a low-cost configuration and to be easily attachable and detachable. [Structure] The carriage 4 has fitting recesses 4b formed at both ends in the width direction, a mounting hole 4c between both fitting recesses 4b, and a locking hole 4 perpendicular to the mounting hole 4c.
e is formed. The print head 1 has a fitting recess 4b.
A fitting piece 1b that fits into the mounting hole 4c is formed, and a mounting piece 1d that is inserted into the mounting hole 4c is formed. A locking hole 1e is formed at the tip of the mounting piece 1d, and the locking piece 5b of the lock plate 5 is inserted into and removed from the locking hole 1e through the locking hole 4e of the carriage 4. ing.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on the installation of a print head on a carriage that is slidably supported on a guide shaft. Regarding structure.

0002

[Conventional technology]

In serial printers, the print head is mounted on a carriage that is slidably supported on a guide shaft. The head is attached and the print head is fed by driving the carriage. It is designed to be able to print by moving in a direction perpendicular to the direction.

0003 By the way, with serial printers, you can print as needed during repairs, maintenance and inspections, etc. It is preferable that the head can be attached and detached, and conventionally it is possible to attach or detach the head using a fastening member such as a screw or a fixing member. The print head is detachably attached to the carriage via a tool.

0004 For example, the structure of attaching the print head to the carriage via a fixture is as follows: There is a technique disclosed in Hei 3-10053. According to this structure, the print head A locking protrusion with an enlarged diameter tip is formed on the carriage, and the print head is attached to the carriage. The locking protrusion can be inserted and removed freely in the retracted position of the print head, and the locking protrusion can be inserted and removed freely when the A locking hole is formed that locks the shaft so that it cannot be pulled out. and secure it to the carriage. A fixture is removably attached to the rear of the print head, and the print head is moved forward through the fixture. It is held in the advanced position so that it cannot be retracted, and the print head can be attached and detached by attaching and detaching the fixture. The sea urchin is turning.

[0005]

[Problem that the idea aims to solve]

However, in the former case, it is time-consuming to fasten the fastening members when installing the print head. In the latter case, after inserting the locking protrusion into the locking hole when installing the print head. Sliding the print head, such as when the print head needs to be slid into the forward position. The work is cumbersome, and in either case, the workability of attaching and detaching the print head is poor. Also In the latter case, the locking hole needs to have a complicated shape with an enlarged diameter at the bottom. It also increases costs.

[0006] This invention has a print head that has a low-cost configuration and can be easily attached and detached. The purpose is to provide a mounting structure.

[0007]

[Means to solve the problem]

This invention is based on the installation of a print head on a carriage that is slidably supported on a guide shaft. The structure consists of a mounting hole formed in the carriage, and a print head that can be inserted into and removed from the mounting hole. A mounting protrusion formed to be freely removable, a locking part formed on the mounting protrusion, and a locking portion formed on the mounting protrusion. It is locked in the stop part so that it can be inserted and withdrawn freely in the direction that crosses the insertion and withdrawal direction of the mounting protrusion. A locking member that prevents the mounting protrusion from being removed from the mounting hole. are doing.

[0008]

[Effect]

According to the print head mounting structure according to the present invention, the print head is attached to the mounting hole of the carriage. Insert the mounting protrusion of the card, and in this inserted state insert the locking member into the locking part of the mounting protrusion. When the print head is stopped, the locking member will pull out the print head's mounting protrusion into the carriage's mounting hole. is permanently locked, which attaches the print head to the carriage. . From this installed state, pull out the lock member and remove it from the locking part of the mounting protrusion. If so, the mounting protrusion of the print head can be pulled out from the mounting hole of the carriage, and this If you remove the print head mounting protrusion from the carriage mounting hole in this condition, the print head will It is removed from the carriage.

[0009]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. ◆ As shown in FIGS. 1 and 2, the print head 1 has a guide shaft 2 at one end that slides automatically. A U-shaped bearing 1a that fits into the shaft is integrally formed, and a guide is attached to the other end. A carriage 4 that is slidably fitted onto a guide shaft 3 parallel to the shaft 2 acts as a locking member. It is attached via the lock plate 5 of the It is possible to move parallel to Latin.

0010 A U-shaped belt receiver 4a is formed at the upper end of the carriage 4, and this belt A portion of the timing belt 6 is fixed to the receiver 4a. timing belt 6 There are pulleys 7 on both sides of the print head 1 in the direction of movement (one pulley is omitted in Figure 1). It is. ) is wrapped around. This timing belt 6 is connected to a cap (not shown). It is rotated by the driving force of the ridge motor, and moves to the carriage 4 by receiving this driving force. The print head 1 is driven to travel by applying force.

[0011] The carriage 4 has a mounting side for the print head 1 as shown in FIG. Fitting recesses 4b are formed on both sides in the width direction, and there is a space between both fitting recesses 4b. A mounting hole 4c is formed, and as shown in FIG. A locking hole 4e is formed on the opposite side to be perpendicular to the mounting hole 4c and communicate with the mounting hole 4c. Ru.

0012 The print head 1 has a side that is attached to the carriage 4 as shown in FIG. A fitting piece 1b is formed at both ends in the width direction to be inserted and fitted into the fitting recess 4b of the carriage 4. and is inserted into and engaged with the mounting hole 4c of the carriage 4 between the two fitting pieces 1b. A pair of engaging pawls 1c are formed between the two engaging pawls 1c, and the capacitor together with the engaging pawl 1c is formed between the two engaging pawls 1c. A mounting piece 1d is formed as a mounting protrusion to be inserted into the mounting hole 4c of the ridge 4. Ru.

[0013] The fitting piece 1b connects the print head 1 to the carriage 4 by fitting into the fitting recess 4b. positioning. This fitting piece 1b is attached to the base as shown in FIG. The wall is gradually thinned from the part to the tip, and the fitting recess is formed when the lock plate 5 is removed. It can be freely inserted into and removed from the portion 4b. In addition, when the carriage 4 is fitted The recess 4b gradually contracts in the direction of insertion of the fitting piece 1b in accordance with the shape of the fitting piece 1b. diameter.

[0014] The engaging claw 1c holds the print head 1 in the carriage by engaging with the mounting hole 4c of the carriage 4. It is designed to be temporarily fixed to ridge 4. The mounting hole 4c of the carriage 4 has an engaging A stepped portion 4d is formed to expand the diameter of the inner part of the claw 1c in the insertion direction, and the engaging claw is attached to this stepped portion 4d. 1c is adapted to be engaged. The engaging claws 1c are elastic in the direction of approaching each other. It is designed to be deformable, and fits into the mounting hole 4c of the carriage 4 when the lock plate 5 is removed. It is designed to be able to be inserted and extracted in the same direction as the insertion and extraction direction of the joint piece 1b. .

[0015] The mounting piece 1d is inserted with the engaging piece 1b together with the engaging claw 1c when the lock plate 5 is removed. It is designed to be able to be inserted and extracted freely into the mounting hole 4c of the carriage 4 in the same direction as the extraction direction. It has become. The mounting hole 4c of the carriage 4 has a mounting piece 1d and one engaging claw 1c. A partition plate 4f is formed between the front and back to prevent incorrect insertion of the mounting piece 1d from the reverse direction. It is now possible to do so. In other words, attach the mounting piece 1d to the carriage 4 from the front and back. When inserted into the mounting hole 4c, the mounting piece 1d comes into contact with the partition plate 4f and the mounting piece 1d is inserted into the mounting hole 4c. Further insertion is prevented.

[0016] This mounting piece 1d crosses the locking hole 4e of the carriage 4 when the print head 1 is temporarily fixed. (See Figure 5). At the tip of this mounting piece 1d, there is a carriage. A rectangular locking hole 1e as a locking portion is formed in a portion facing the locking hole 4e of No. 4. ing.

[0017] The lock plate 5 is made of a metal plate, and as shown in FIGS. A lock piece 5b and cable holding pieces 5c and 5d are formed in a comb-like shape on one side. At the same time, a detection piece 5e as a detection plate is formed at one end of the substrate 5a.

[0018] The lock piece 5b passes through the locking hole 4e of the carriage 4 and the locking hole 1e of the print head 1. The mounting piece 1d of the print head 1 is inserted and locked into the mounting hole 4c of the carriage 4 and pulled out. This makes it impossible to lock. This lock piece 5b has a section from the base to the tip. A protrusion 5f is formed in the vicinity, and this protrusion 5f prevents the print head 1 from engaging. It is inserted and locked into the stop hole 1e by frictional force. This protrusion 5f is located at the print head. Push in the print head 1 from the temporarily secured state to fit the fitting piece 1b of the print head 1 into the carriage 4. It also has the role of fitting into the fitting recess 4b. In other words, the print head 1 is temporarily fixed. In this state, the locking hole 1e of the print head 1 is aligned with the mounting piece 1d relative to the locking hole 4e of the carriage 4. It is positioned slightly off the extraction side. And this temporary seal In this state, the lock piece 5b passes through the locking hole 4e of the carriage 4 and locks into the locking hole 1 of the print head 1. e, the locking hole 1e of the print head 1 is fixed to the carriage 4 by the protrusion 5f. The print head 1 is pushed in so that it is aligned with the locking hole 4e of the so that the fitting piece 1b of the print head 1 is fitted into the fitting recess 4b of the carriage 4. It has become.

[0019] The lock piece 5b of the cable holding pieces 5c and 5d is inserted into the locking hole 1e of the print head 1. In the locked state, as shown in FIG. and is used to hold the flat cable 8 connected to the print head 1. It looks like this. The cable holding piece 5c is attached to the carriage 4 as shown in FIG. The flat cable 8 is held between the outer periphery and the cable holding piece 5d is locked on the outside. A flat cable 8 is sandwiched between the carriage 4 and the outer periphery thereof. child The cable holding pieces 5c and 5d are elastically deformed in the direction of approaching and separating from the outer peripheral surface of the carriage 4. The flat cable 8 is held between the outer circumference of the carriage 4 and the outer circumference of the carriage 4 by elastic force. It has become so. The flat cable 8 connects the print head 1 as shown in FIG. and the carriage 4 so that it is pulled out to the back side of the carriage 4. There is. This flat cable 8 runs in the width direction of the carriage 4 on the back side of the carriage 4. The cable holding piece 5c and the carriage 4 are bent at right angles so as to extend. It is designed to be held between the outer periphery of the In addition, the flat cable 8 is The width of the carriage 4 extends from the bent part on the back side of the ridge 4 in the width direction of the carriage 4. It is folded back to the opposite side at the end of the direction, and the cable holding piece 5d and the carrier are It is designed to be held between the outer periphery of the edge 4. The cable holding piece 5d has As shown in FIG. 3, a curved piece 5g is formed on the folded side of the flat cable 8. This curved piece 5g prevents the flat cable 8 from being damaged. ing. Note that the tip of the flat cable 8 is connected to a control circuit board (not shown). and is used for controlling the print head 1.

[0020] The detection piece 5e is in a state where the lock piece 5b is inserted and locked in the locking hole 1e of the print head 1. As shown in FIG. It is designed to be used as a detection part of the room sensor 10. carriage 4 The upper surface has a receiving groove 4f into which the lower end of the detection piece 5e is inserted, as shown in FIG. The detection piece 5e is positioned by the receiving groove 4f. Ru. The home sensor 10 is a photo interrupter type sensor, and is shown in FIG. As shown in FIG. It is designed to detect when the detection piece 5e enters between the detection piece 10b and the detection piece 5e. .

[0021] According to the above configuration, the fitting piece 1 of the print head 1 is fitted into the fitting recess 4b of the carriage 4. b, and at the same time, move the mounting piece 1d of the print head 1 into the carriage together with the engaging claw 1c. 4 into the mounting hole 4c of the carriage 4, and insert the engagement claw 1c of the print head 1 into the mounting hole 4c of the carriage 4. When the print head 1 is engaged with the stepped portion 4d of c, the print head 1 is temporarily fixed to the carriage 4, and this temporary In the stopped state, insert the lock into the locking hole 4e of the carriage 4 through the locking hole 1e of the print head 1. When the lock piece 5b of the locking plate 5 is inserted and locked, the print is inserted into the fitting recess 4b of the carriage 4. At the same time as the fitting piece 1b of the print head 1 is fitted, the mounting piece 1d of the print head 1 is attached to the carriage. The print head 1 is locked in the mounting hole 4c of the carriage 4 so that it cannot be removed. Fixed.

[0022] When the print head 1 is fixed, the cable holding pieces 5c and 5d of the lock plate 5 and the cable The flat cable 8 is held between the ridge 4 and the detection piece 5e is placed at the home. It acts as a detection part of the sensor 10.

[0023] When the print head 1 is in a fixed state, the lock piece 5b of the lock plate 5 is moved from the carriage 4. When pulled out from the locking hole 4e, the lock piece 5b of the lock plate 5 will fit into the locking hole of the print head 1. 1e, the print head 1 is in a temporarily fixed state, and the print head 1 is removed from this temporarily fixed state. The fitting piece 1b of the character head 1 is pulled out from the fitting recess 4b of the carriage 4, and printing is started. Pull out the mounting piece 1d of the head 1 together with the engagement claw 1c from the mounting hole 4c of the carriage 4. For example, the print head 1 is removed from the carriage 4.

[0024] In this way, in this embodiment, the print head 1 can be controlled by attaching and detaching the lock plate 5 as in the conventional case. It can be easily attached and detached without having to slide the print head 1. There is no need to form complex-shaped mounting holes or mounting protrusions on the carriage 4, resulting in low cost. It is.

[0025] In addition, in this embodiment, the lock plate 5 includes cable holding pieces 5c, 5d and a detection piece 5. e is formed integrally, so the lock plate 5 is connected to the cable holding plate and the home sensor 1. It is also used as a zero detection plate and is low cost. In addition, the lock plate 5 may be made of a metal plate. Since the detection piece 5e is formed with a thin structure, the detection piece 5e can be provided with high accuracy. Wear.

[0026]

[Effect of the idea]

As explained above, according to the print head mounting structure according to the present invention, the print head It has an excellent effect of being a low-cost structure and being easy to attach and detach.

[Brief explanation of drawings]

FIG. 1 is a plan view of the periphery of a print head showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a sectional view taken along line BB in FIG. 2;

FIG. 4 is a right side view of FIG. 1.

FIG. 5 is an exploded perspective view corresponding to FIG. 1;

FIG. 6 is a plan view of the lock plate.

FIG. 7 is a left side view of the lock plate.

[Explanation of symbols]

1 Print head 1d Mounting piece (mounting protrusion) 1e Locking hole (locking part) 2, 3 Guide shaft 4 Carriage 4c Mounting hole 5 Lock plate (lock member) 5c, 5d Cable holding piece 5e Detection piece

Claims (3)

[Scope of utility model registration request] 1. A structure for mounting a print head on a carriage slidably supported on a guide shaft, wherein a mounting hole is formed in the carriage, and a mounting hole is formed in the print head so that the print head can be inserted into and extracted from the mounting hole. a mounting protrusion formed on the mounting protrusion, a locking part formed on the mounting protrusion, and a locking part that is engaged with the locking part so as to be freely inserted and withdrawn from the mounting hole in a direction intersecting the direction of insertion and withdrawal of the mounting protrusion. and a locking member that prevents the mounting protrusion from being pulled out. 2. The print head mounting structure according to claim 1, wherein the locking member is integrally formed with a holding plate for a cable connected to the print head. 3. The print head mounting structure according to claim 2, wherein the locking member is integrally formed with a detection plate that activates a sensor that detects the position of the print head.