JP4988514B2 - High voltage contact terminal block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high voltage contact terminal base capable of connecting various process units and a high voltage substrate easily and efficiently. <P>SOLUTION: The high voltage contact terminal base 1 holds a high voltage contact that electrically connects the various process units of an image forming apparatus and a high voltage substrate having a high voltage power source that supplies high voltages to the process units. In the high voltage contact terminal base 1, the high voltage contact is composed of a spring contact 10, a V-shaped part 10a is formed in the spring contact 10. A round terminal 11 attached to one end of an electric wire connecting the process units and the high voltage substrate is engaged with and fixed to the V-shaped part 10a of the spring contact 10. In addition, parts other than the V-shaped part 10a of the spring contact 10 are brought into contact with the high voltage substrate. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a high-voltage contact terminal block that holds a high-voltage contact that electrically connects various process units of an image forming apparatus and a high-voltage substrate having a high-voltage power source that supplies a high voltage thereto.

  Various image processing units that require high voltage, such as image carrier units, charging units, developing units, transfer units, cleaning units, and fixing units, in image forming apparatuses such as printers and copiers that form images by electrophotography However, the high-voltage substrate provided with a high-voltage power supply for supplying a high voltage to these process units and the various process units are arranged at positions separated from each other.

  Therefore, a plurality of high-voltage contacts held on the high-voltage contact terminal block and each terminal of the high-voltage board are connected, and for example, a round terminal attached to an end of an electric wire extending from various process units is connected to each high-voltage contact. Therefore, a method of electrically connecting various process units and the high voltage substrate is employed.

Various proposals have also been made for detachable contact terminal blocks that are not limited to image forming apparatuses (see, for example, Patent Documents 2 and 3).
Japanese Patent Laid-Open No. 2007-071999 JP 2005-257916 A JP 2004-240403 A

  In a high-voltage contact terminal block conventionally used in an image forming apparatus, a leaf spring that can hold a predetermined contact pressure by elastically contacting each terminal of a high-voltage substrate is connected to the high-voltage contact held by the terminal block. Is used, and the terminal and leaf springs attached to the ends of the wires extending from the various process units are fastened with fastening parts such as screws, so it is troublesome to attach and remove the terminals to and from the leaf springs. In a color image forming apparatus provided with many high-voltage contacts, there is a problem that a lot of time is spent on the work and work efficiency is poor.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a high voltage contact terminal block capable of easily and efficiently connecting various process units and a high voltage substrate.

  In order to achieve the above object, the invention described in claim 1 is a high voltage circuit for holding a high voltage contact for electrically connecting various process units of the image forming apparatus and a high voltage substrate having a high voltage power source for supplying a high voltage thereto. In the contact terminal block, the high-voltage contact is constituted by a spring contact, a V-shaped portion is formed in the spring contact, and a round terminal attached to one end of an electric wire connecting the process unit and the high-voltage substrate is It is characterized by being engaged and fixed to the V-shaped part of the spring contact.

  According to a second aspect of the present invention, in the first aspect of the present invention, a portion other than the V-shaped portion of the spring contact is brought into contact with the high-pressure substrate.

  According to the first aspect of the present invention, if the round terminal attached to one end of the electric wire connecting the process unit and the high voltage substrate is pressed against the V-shaped portion of the spring contact, the V-shaped portion of the spring contact is elastic. When the round terminal is deformed to allow movement and the round hole of the round terminal passes through the V-shaped part of the spring contact, the V-shaped part of the spring contact returns to its original state due to elasticity and the circle of the round terminal Since the round terminal is fixed and connected to the spring contact by engaging with the hole, the round terminal can be easily connected to the spring contact with a single operation by simply pushing the round terminal into the high-voltage contact terminal block. The various process units and the high-voltage board can be easily and efficiently connected via the electric wires.

  According to invention of Claim 2, a high voltage board | substrate can be connected to a process unit via a spring contact, a round terminal, and an electric wire by making parts other than the V-shaped part of a spring contact contact a high voltage board.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<Embodiment 1>
1 is a side view of a main body frame of an image forming apparatus having a high-voltage contact terminal block according to Embodiment 1 of the present invention, FIG. 2 is an enlarged detail view of part A in FIG. 1, and FIG. 4 is a partial perspective view showing the connection structure with the contact, FIG. 4 is a perspective view of the main body frame as seen obliquely from below, FIG. 5 is an enlarged detailed view of part B of FIG. 4, and FIG. It is a perspective view of a contact terminal block.

  The high-voltage contact terminal block 1 according to the present invention includes various process units (not shown) that require high voltage, such as an image carrier unit, a charging unit, a developing unit, a transfer unit, a cleaning unit, and a fixing unit of a full-color laser beam printer. Are electrically connected to a high-voltage board 2 (see FIG. 4) having a high-voltage power source for supplying high voltage to them, as shown in FIGS. The process unit and the high-voltage board 2 shown in FIG.

  Here, as shown in FIGS. 2 and 3, a round terminal 5 is attached to one end of the electric wire 4, and this round terminal 5 is a cylindrical positioning boss projecting horizontally on the main body frame 3. 6 is positioned by fitting the circular hole 5a into the body frame 6, and is fixed to the body frame 3 by being locked to a snap fit 7 provided in the body frame 3. As shown in FIG. 2, a spring contact 8 made of a coil spring, which is a high-voltage contact on the process unit side, is in contact with the round terminal 5, whereby the round terminal 5 and the spring contact 8, that is, the process contact. The unit and the electric wire 4 are electrically connected.

  On the other hand, as shown in FIGS. 4 and 5, the high-voltage board 2 having a high-voltage power source for supplying a high voltage to the process unit is disposed at the bottom of the main body frame 3. The electric wire 4 is electrically connected by the high voltage contact terminal block 1 according to the present invention.

  As shown in FIGS. 4 and 5, the high-voltage contact terminal block 1 according to the present invention is fixed by being inserted into the main body frame 3 from the outside. As shown in detail in FIG. The contact holding member 9 is integrally formed of resin.

  As shown in FIG. 6, the resin contact holding member 9 of the high-voltage contact terminal block 1 is integrally formed with a fixing portion 9a to the main body frame 3, a horizontal terminal block 9b, and a columnar positioning boss 9c. In addition, a coil spring-like spring contact 10 which is a high-voltage contact is fitted into the positioning boss 9c to be positioned and held. A V-shaped portion 10 a is formed at one end of the spring contact 10, and the other end of the spring contact 10 is bent into a U shape so as to wrap around the upper portion of the contact holding member 9, and is a high voltage terminal portion. 10b.

  Thus, the round terminal 11 shown in FIG. 6 is attached to the other end of the electric wire 4 (see FIGS. 1 to 3), and this round terminal 11 is attached to the high-voltage contact board 1 as shown in FIG. When inserted from the outside, first, the outer peripheral portion of the round terminal 11 comes into contact with the V-shaped portion 10a of the spring contact 10 to elastically deform the V-shaped portion 10a. The V-shaped portion 10 a of the spring contact 10 is elastically deformed to allow the round terminal 11 to be pushed in. When the circular hole 11 a of the round terminal 11 passes through the V-shaped portion 10 a of the spring contact 10, the spring contact is formed. Ten V-shaped portions 10 a are restored to their original state by elasticity and engage with the circular holes 11 a of the round terminals 11. For this reason, the round terminal 11 is fixed and connected to the spring contact 10, and the round terminal 11 can be easily pushed by one touch by simply pushing the round terminal 11 into the high-voltage contact terminal block 1. Can be connected to.

  Since the high voltage terminal portion 10b of the spring contact 10 is in contact with the high voltage substrate 2 shown in FIGS. 4 and 5, the high voltage substrate 2 is connected to the spring contact 10 of the high voltage contact terminal block 1, the electric wire 4 and the spring contact 8 on the unit side. It is electrically connected to each other via (see FIG. 2), and a high voltage can be supplied from the high-voltage substrate 2 to the process unit to stably operate the process unit.

  As described above, when the high-voltage contact terminal block 1 according to the present invention is used, the round terminal 11 can be easily connected to the spring contact 10 with one touch by simply pushing the round terminal 11 into the high-voltage contact terminal block 1. Therefore, it is possible to obtain an effect that various process units and the high-voltage board 2 can be easily and efficiently connected via the electric wire 4.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.

  7 is a perspective view of a high-voltage contact terminal block according to Embodiment 2 of the present invention, FIG. 8 is an enlarged detail view of a portion C in FIG. 7, FIG. 9 is an enlarged detail view of a portion D in FIG. It is a D section enlarged front view.

  The high-voltage contact terminal block 21 according to the present embodiment has a contact holding member 29 integrally formed of a highly insulating resin as shown in FIG. 7. The contact holding member 29 includes magenta ( Corresponding to process units (not shown) of M), cyan (C), yellow (Y), and black (K), four spring contacts 30 in the form of coil springs are provided as high-voltage contacts. As shown in FIGS. 9 and 10, each spring contact 30 is positioned and held by a cylindrical positioning boss 26 projecting horizontally, and a V-shaped portion 30a is formed at one end thereof. Yes. Although not shown, the other end of each spring contact 10 is in contact with the high voltage substrate.

  Thus, the high-voltage board and each process unit are electrically connected to each other by an unillustrated electric wire as in the first embodiment, but a round terminal 31 shown in FIGS. 9 and 10 is connected to one end of each electric wire. The round terminal 31 is engaged with and fixed to the spring contact 30 in the same manner as in the first embodiment.

  That is, when the round terminal 31 is inserted into the high-voltage contact terminal block 21 from the near side to the far side in FIGS. 9 and 10, first, the outer periphery of the round terminal 31 contacts the V-shaped portion 30 a of the spring contact 30. The V-shaped portion 30a is elastically deformed in contact therewith. The V-shaped portion 30 a of the spring contact 30 is elastically deformed to allow the round terminal 31 to be pushed in. When the circular hole 31 a of the round terminal 31 passes through the V-shaped portion 30 a of the spring contact 30, the spring contact The 30 V-shaped portion 30 a returns to its original state due to elasticity and engages with the circular hole 31 a of the round terminal 31. For this reason, the round terminal 31 is fixed and connected to the spring contact 30, and the round terminal 31 can be easily pushed by one touch by simply pushing the round terminal 31 into the high-voltage contact terminal block 21. Can be connected to.

  Further, as described above, since the high voltage substrate contacts the other end of the spring contact 30, the high voltage substrate is mutually connected via the spring contact 30 of the high voltage contact terminal block 21 and the spring contact (not shown) on the electric wire and unit side. The process unit can be stably operated by being electrically connected and supplying a high voltage from the high-voltage substrate to the process unit.

  As described above, when the high-voltage contact terminal block 21 according to the present embodiment is used, the spring contact 30 can be easily touched with a single operation by simply pushing the round terminal 31 into the high-voltage contact terminal block 21. Therefore, it is possible to easily and efficiently connect the various process units and the high voltage substrate through the electric wires.

It is a side view of the main body frame of the image forming apparatus provided with the high voltage contact terminal block according to Embodiment 1 of the present invention. It is the A section enlarged detail drawing of FIG. It is a fragmentary perspective view which shows the connection structure of a round terminal and a process unit side contact. It is the perspective view which looked at the main body frame from the slanting lower part. It is the B section enlarged detail drawing of FIG. It is a perspective view of the high voltage contact terminal block concerning Embodiment 1 of the present invention. It is a perspective view of the high voltage contact terminal block concerning Embodiment 2 of the present invention. It is the C section enlarged detail drawing of FIG. It is the D section enlarged detail drawing of FIG. It is the D section enlarged front view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High voltage contact terminal block 2 High voltage board 3 Main body frame 4 Electric wire 5 Round terminal 5a Round terminal hole 6 Positioning boss 7 Snap fit 8 Spring contact (high voltage contact)
9 Contact holding member 9a Contact holding member fixing portion 9b Contact holding member terminal block 9c Contact holding member positioning 10 Spring contact (high voltage contact)
DESCRIPTION OF SYMBOLS 10a V-shaped part of a spring contact 10b High voltage terminal part of a spring contact 11 Round terminal 11a Circular hole of a round terminal 21 High voltage contact terminal block 26 Positioning boss 29 Contact holding member 30 Spring contact (high voltage contact)
30a Circular hole of spring contact 31 Round terminal 31a Circular hole of round terminal

Claims (2)

In a high-voltage contact terminal block that holds a high-voltage contact that electrically connects various process units of the image forming apparatus and a high-voltage substrate having a high-voltage power source that supplies a high voltage thereto,
The high-voltage contact is composed of a spring contact, and a V-shaped portion is formed in the spring contact, and a round terminal attached to one end of an electric wire connecting the process unit and the high-voltage substrate is a V-shape of the spring contact. A high-voltage contact terminal block characterized by being engaged with and fixed to a shaped portion. 2. The high voltage contact terminal block according to claim 1, wherein a portion other than the V-shaped portion of the spring contact is brought into contact with the high voltage substrate.

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