JP2548988B2 - Winding terminal processor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a winding terminal processing device for processing an end of a winding of a magnetic head used in, for example, a video tape recorder.

[Prior Art] FIG. 7 shows an example of the configuration of a conventional magnetic head.

As shown in the figure, the magnetic head 23 is basically composed of a substrate 31 having a head support 32 and a head chip portion 33 around which a winding is wound. A hole 25 is formed in the substrate 31, and one surface of the substrate 31 (the surface on the back side of the paper surface)
The end of the winding that is fixed to and extends from the head chip portion 33.
24a and 24b are inserted into the hole 25 and are drawn out to the opposite surface (front surface of the paper). 26a and 26b are lands formed on the substrate 31, and the terminals 24a and 24b are soldered to them.

Conventionally, winding of the winding wire has been performed manually. However, recently, for example, JP-A-62-45012 and JP-A-62-45012.
An automatic winding machine that automatically performs a winding process is becoming popular due to the technique disclosed in Japanese Patent Publication No. 47104. It is only necessary to weld the winding end to the land after the winding process is completed, but the winding mechanism of the automatic winding machine is very complicated, and the winding wire is held around the magnetic head. Since a large number of members such as members and suction members are arranged, it is difficult to secure a space for terminal treatment with a soldering iron or the like.

Therefore, after the winding process is completed, the end of the winding is welded to the land in a separate process by a welding machine.

Then, when it is sent to the process of the welding machine, the terminal 24a,
To prevent 24b from coming off the hole 25 due to the elastic force of the winding,
It is temporarily fixed to the temporary fixing portions 34a, 34b with an adhesive.

[Problems to be Solved by the Invention] As described above, in the conventional device, since the winding terminal is temporarily fixed by the adhesive, the adhesive flows to the land, and then the welding to the land is performed. During the process,
Poor soldering sometimes occurred. In addition, the adhesive has to be dried before a certain degree of adhesive strength is obtained, and there is a drawback that the work takes time. Further, when there is a winding mistake, the winding wire cannot be unraveled because it is temporarily fixed with an adhesive, and the magnetic head has to be discarded. As a result, there are drawbacks that the yield is poor and the cost is high.

The present invention has been made in view of such a situation, and prevents the occurrence of defective soldering, improves the work efficiency and the yield, and enables the cost reduction.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional drawbacks, and the present invention provides a head support having a magnetic head wound with a winding and a substrate having a land formed thereon. A winding terminal fixed to a support base and soldering the end of the winding to the land in a state where the end of the winding is passed over the land and one end of the end is locked to a locking portion. In the processing device, an electrode for soldering an end of the winding to the land is moved between a position separated from the land and a position in contact with the land, and the electrode is the winding. The pressure detector that detects the pressure when it comes into contact with the land through the terminal of the, and the signal that detects the pressure state by the pressure detector starts energizing the electrode and energizes after a predetermined time. Equipped with a power supply unit to release It is a winding terminal processing device characterized by the above.

Further, the electrode in the above invention is characterized in that a protrusion for locally heating is formed corresponding to the land.

Further, the electrode in the above invention has a protrusion for locally heating corresponding to the land, and a small diameter portion having a small cross-sectional area is formed on at least one side in the vicinity of the protrusion. It is characterized by that.

[Operation] In the winding terminal treatment device according to claim 1, when the electrode moves toward the land of the substrate and the electrode comes into contact with the land of the substrate through the end of the winding, the pressure is applied. Since it is detected by the pressure detector, it is possible to prevent the end of the winding from being cut during soldering. Furthermore, since the power supply unit starts energizing the electrodes with a signal that detects the pressurization state by the pressure detector and deenergizes the electrodes after a predetermined time, a substantially constant amount of heat generated from the electrodes is constantly applied to the land of the substrate. It can be stably applied, and the end of the winding can be satisfactorily and surely soldered to the land.

In the winding end treatment device according to the second aspect, since the protrusion formed on the electrode contacts the land, the contact state between the electrode and the land can be ensured.

 Therefore, reliable soldering is possible.

In the winding end treatment device according to the third aspect, the small diameter portion having a small cross-sectional area is formed in the vicinity of the protrusion formed on the electrode. Therefore, the protrusion can be heated to a high temperature efficiently and in a short time.

[Embodiment] FIGS. 1 to 3 show the construction of an embodiment of a winding terminal processing apparatus of the present invention.

In these figures, 2 is a base fixed to a predetermined base, and a main slide unit 3 is attached to the base. The main slide unit 3 is composed of a fixed portion 3a fixed to the base 2 and a slide portion 3b that is slid in the left-right direction in the figure with respect to the fixed portion 3a by the main cylinder 5 fixed to the base 2. . Slide part
A main plate 4 is fixed to 3b, and a shock absorber 6 is attached to a rear (leftward) end of the main plate 4 via an absorber bracket 7. Reference numeral 8 is a stopper fixed to a position where the shock absorber 6 of the base 2 abuts.

9 is a sub-slide unit, the main plate 4
The fixed portion 9a is fixed to the fixed portion 9a and the slide portion 9b is slidable in the left-right direction with respect to the fixed portion 9a. A sub plate 10 is fixed to the slide portion 9b, and the sub plate 10 is moved in the left-right direction by a sub cylinder 11 fixed to the base 2.

Although the main cylinder 5 and the sub-cylinder 11 are driven by compressed air, they may be driven by electromagnetic force.

A balancer 12 is fixed to the sub-plate 10 and has poles 13a and 13b which are movable independently in the left-right direction. Electrode holders 15a and 15b are fixed to the tips of the poles 13a and 13b via insulators 14a and 14b. Conductors 15c, 15d such as copper are fixed to the tips of the electrode holders 15a, 15b,
An electrode 16 is further fixed to the tips of the conductors 15c and 15d.

In this way, the main slide unit 3, the main plate 4, the sub slide unit 9, the sub plate 1
0, the balancer 12, the electrode holders 15a and 15b, and the like constitute a moving unit that moves the electrode 16.

The electrode 16 is formed, for example, by processing a heat resistant resistance wire material such as molybdenum or tungsten into a substantially U shape, and its diameter is
It is formed as thin as about 1 mm, and its heat capacity is reduced. As a result, for example, it is possible to heat to a high temperature of about 800 degrees Celsius in a short time and cool in a short time.

Further, as shown in FIGS. 4A to 4C, protrusions 17a and 17b are formed at the tip of the electrode 16. These protrusions 17a and 17b are
It is formed corresponding to the lands 26a and 26b of the magnetic head 23 described above. Further, small diameter portions 17c, 17d, 17e having a small cross-sectional area are formed near the protrusions 17a, 17b. The small diameter portions 17c, 17d, 17e generate resistive heat in the entire electrode 16 when a relatively large current is applied to the electrode 16, but the protrusions 17a, 17b
The small-diameter portions 17c, 17d, 17e in the vicinity generate more heat, and the heat is transmitted to the protrusions 17a, 17b to heat the lands 26a, 26b more efficiently. Further, the small diameter portion may be formed on at least one side of the protrusions 17a and 17b.
As shown in Fig. 2, the small diameter parts 17c, 1
When 7d and 17e are formed, the small diameter parts 17c, 17d and 17e on both sides
The heat generated by the heat is transmitted to the protrusions 17a and 17b from the left and right, and the heating can be performed more efficiently.

Reference numeral 18 in FIGS. 1 and 3 denotes a cord, and the electrode 16
Supply a predetermined power to. Reference numeral 20 denotes a pressure detector attached to the sub-cylinder 11, which detects the pressure applied to the lands 26a and 26b of the electrode 16.

FIG. 5 shows the configuration of an embodiment of a device for supplying electric power to the electrode 16.

In the figure, 19 is a power supply unit, which is composed of a power supply controller 19a and a transformer 19b. The power supply controller 19a is adapted to supply power to the electrode 16 via the transformer 19b and the cord 18 in response to the output of the pressurization detector 20.

FIG. 6 shows the state of the magnetic head after the completion of winding by the automatic winding machine.

As shown in the figure, the magnetic head 23 is pressed against the support base 21 by a rotatable pressing member 41 and is supported by the support base 21. Further, the ends 24a, 24b of the windings drawn out from the holes 25 of the substrate 31 are locking claws 22a, 2b fixed to the support base 21.
It is locked to 2b. In this state, the winding end 24
The a and 24b are designed to pass over the lands 26a and 26b.

Other configurations of the magnetic head 23 are the same as those in FIG. 7 except that the temporary fixing portions 34a and 34b are not provided.

 Next, the operation will be described.

In the automatic winding machine, when the winding process for the magnetic head 23 supported by the support base 21 is completed and the ends 24a, 24b of the winding are locked by the locking claws 22a, 22b, a means (not shown) is used. Compressed air is introduced and the main cylinder 5 and the sub cylinder 11 are operated. As a result, the main plate 4 fixed to the ride part 3b is attached to the fixed part 3a as shown in FIGS.
It is moved to the right from the position shown in the figure. Sub slide unit 9, sub plate 10, balancer 12, electrode holder 15
Since the a, 15b and the electrodes 16 are sequentially arranged on the main plate 4, they move integrally to the right with the main plate 4.

When the main plate 4 is moved to a predetermined position as shown in FIG. 3, the protrusions 17a and 17b of the electrode 16 are connected to the ends 24 of the winding.
It contacts the lands 26a, 26b via a, 24b. Sub cylinder
Since the pressing force of 11 is set to a value smaller than the pressing force of the main cylinder 5, the electrode 16 (electrode holders 15a, 15b, balancer 1
2, the sub plate 10 and the slide portion 9b) move to the left relative to the main plate 4, and the pressure applied to the lands 26a, 26b of the protrusions 17a, 17b gradually increases.

When the pressure applied to the lands 26a, 26b of the protrusions 17a, 17b is not balanced, as shown in FIG. 2, the poles 13a, 13b arranged on the left and right when viewed from above move mutually and the pressure applied by both Is balanced. Thereby, the protrusions 17a, 17b
Are reliably brought into contact with the lands 26a and 26b.

As shown in FIG. 3, when the shock absorber 6 moves to a position where it abuts on the stopper 8, the shock is absorbed by the shock absorber 6 and the main plate 4 stops at that position.

On the other hand, the pressure detector 20 includes the lands 26a, 26b of the protrusions 17a, 17b.
Is detected, and when the value reaches a predetermined reference value set in advance, an energization start signal is output to the power supply controller 19a.

Alternatively, the pressure detector 20 may detect only the pressing force and the power supply controller 19a may compare the detected value with the reference value.

When the energization start signal is input, the power supply controller 19a supplies a predetermined electric power to the power supply 16 via the transformer 19b, the cord 18, and the conductors 15c and 15d. This allows the electrode 16
At the same time resistance heat is generated in the whole, small diameter parts 17c, 17d, 17e
The heat generated in 1 is transmitted to the protrusions 17a, 17b from the left and right,
7a and 17b generate heat at high temperature in a short time to heat the lands 26a and 26b. Therefore, the coating of the terminals 24a and 26b of the winding is destroyed and the solder on the radon 26a and 26b is melted. As a result, the winding ends 24a, 24b are soldered to the lands 26a, 26b.

At this time, soldering is possible without flux.

When a predetermined time has passed after the start of energization, the energization is released and the electrode 16 is cooled in a short time (several seconds). Also,
The main cylinder 5 and the sub-cylinder 11 are operated in opposite directions, and the main plate 4 is returned to the position shown in FIGS. 1 and 2.

The present invention is not limited to video tape recorders, and can be applied to magnetic heads having a winding structure, such as a single azimuth structure, a double azimuth structure, and various other magnetic heads. .

[Advantages of the Invention] As described in detail above, in the winding terminal processing device according to the present invention, according to claim 1, the ends of the windings wound around the magnetic head are soldered to the lands formed on the substrate. At this time, an electrode for soldering corresponding to the land of the board is made movable in the land direction, and the pressure when this electrode contacts the land of the board through the end of the winding is detected by the pressurization detector. Since it is detected by, it is possible to prevent the end of the winding from being cut during soldering.

Further, since the power supply unit energizes the electrodes with a signal based on the pressurization state from the pressurization detector and deenergizes the electrodes after a predetermined time, a substantially constant heat generation amount from the electrodes is always stabilized on the land of the substrate. In addition, since no carbon or oxide film is formed on the electrodes, it is not necessary to clean the electrodes, and the ends of the windings wound around the magnetic head can be satisfactorily and reliably applied to the land of the substrate. Can be soldered.

Also, if the predetermined time for energizing the electrodes is set to, for example, a short time, the electrodes can heat up to high temperature in a short time and destroy the coating covering the ends of the windings. Conduction can be made more reliable, which can contribute to improvement in reliability of soldering work.

Further, according to the second aspect of the present invention, since the electrode of the present invention is provided with the protrusion for locally heating corresponding to the land of the substrate, the contact state between the protrusion and the land can be ensured. Therefore, the end of the winding wound around the magnetic head can be satisfactorily and more reliably soldered to the land.

Further, according to claim 3, a protrusion for locally heating is formed on the electrode of the invention corresponding to the land of the substrate, and the cross-sectional area is small in at least one side in the vicinity of the protrusion. Since the small diameter portion is formed, the protrusion can be heated to a high temperature more efficiently in a shorter time, in addition to the effect described in the second aspect. In particular, when the small-diameter portions are formed on both sides of the protrusion, heat is transferred from the left and right to the protrusion, which improves efficiency.

[Brief description of drawings]

FIG. 1 is a sectional view showing the construction of an embodiment of the winding terminal processing apparatus of the present invention, and FIG. 2 is a plan view showing the construction of the embodiment of FIG. 1 in a state where electrodes are separated from a magnetic head. FIG. 3 is a sectional view showing the structure of the embodiment of FIG. 1 in the state where the electrode is in contact with the magnetic head, and FIGS. 4A to 4C show the structure of one embodiment of the electrode in the apparatus of FIG. FIG. 5 is a plan view, a side view or a front view, FIG. 5 is a block diagram showing the configuration of an embodiment of a device for supplying electric power to the electrodes in the device of FIG. 1, and FIG. 6 is a winding process by an automatic winding machine. FIG. 7 is a perspective view of the magnetic head and the support base in the state where the process is completed, and FIG. 7 is a plan view of the conventional magnetic head. 2 ... Base, 3 ... Main slide unit, 3a ...
Fixed part, 3b …… Slide part, 4 …… Main plate, 5
...... Main cylinder, 9 ...... Sub slide unit, 9a
...... Fixed part, 9b ...... Slide part, 10 ...... Sub plate,
11 …… sub-cylinder, 12 …… balancer, 15a, 15b …… electrode holder, 15c, 15d …… conductor, 16 …… electrode, 17a, 17b ……
Projection, 17c, 17d, 17e …… Small diameter part, 19 …… Power supply unit, 1
9a: power supply controller, 19b: transformer, 21: support base, 22a, 22b ... locking claw, 23 ... magnetic head, 24a, 24b
...... Terminal, 25 …… hole, 26a, 26b …… land, 31 …… substrate, 32 …… head support, 33 …… head chip part.

Claims (3)

(57) [Claims] 1. A head support having a magnetic head around which a winding is wound and a substrate on which a land is mounted is fixed to a supporting base, and the end of the winding is passed over the land so that the end of In a winding terminal treatment device for soldering an end of the winding to the land in a state where one end is locked to a locking portion, an electrode for soldering the end of the winding to the land is provided from the land. A moving unit that moves between a separated position and a position in contact with the land; a pressure detector that detects a pressure when the electrode contacts the land through the end of the winding; A winding terminal processing device, comprising: a power supply unit that starts energizing the electrodes and deenergizes the electrodes after a predetermined period of time in response to a signal indicating that a pressure is detected by a pressure detector. 2. The winding terminal treatment device according to claim 1, wherein the electrode has a protrusion for locally heating the electrode in correspondence with the land. 3. The electrode has a protrusion for locally heating corresponding to the land, and a small diameter portion having a small cross-sectional area is formed on at least one side in the vicinity of the protrusion. The winding terminal processing device according to claim 1, wherein: