JPH1186973A - Electric connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connector which has excellent corrosion resistance and is capable of reducing fraction defective in manufacture and increasing the rigidity and breakage strength of a tab terminal. SOLUTION: An annularly square metal shell 8 to encircle the outer wall 7 of a housing 4 is separated from a tab terminal 16. The both parts 8, 16 are connected together in the condition that the holding part of the tab terminal 16 holds the lower edge of the metal shell 8. The rigidity and breakage strength of the tab terminal 16 are increased independently from the metal shell 8. The parts 8, 16 are individually formed for easy machining. Since there is no need for such high positional precision as that required for integrally forming, the parts 8, 16, fraction defective can be reduced. Plating can be applied to the tab terminal 16 after sheeted, and plating irregularity in molding can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector applicable to both a receptacle type and a plug type.

[0002]

2. Description of the Related Art Conventionally, in a receptacle-type or plug-type electrical connector, a countermeasure for grounding when connecting the connector and a countermeasure for discharging static electricity when connecting the connector have been separately taken. On the other hand, the peripheral surface of the outer wall of the housing portion housing the signal transmission terminal is covered with a shielding metal shell, and a tab terminal is integrally formed at an end of the metal shell, and the integrally formed tab is formed. Depending on the terminal,
It has been proposed that grounding and electrostatic discharge be performed collectively (for example, see Japanese Patent Application Laid-Open No. 5-144515).

[0003]

However, when the metal shell and the tab terminal are integrally formed as described in the above publication, there are the following problems. That is, while the metal shell is positioned by the outer wall of the housing portion, the tab terminals are positioned by the tab terminal support holes formed in the housing portion, so that high positional accuracy is required between the metal shell and the tab terminals. . However, in sheet metal processing for integrally forming a metal shell and a tab terminal,
Originally, the processing itself is not easy, and it is difficult to achieve the required high positional accuracy. Further, the yield of the material is poor due to the portion where the tab terminal is formed, and the defect rate is high. The tab terminal portion is formed into a superposed plate shape by being folded and bent, and is subjected to so-called close contact bending to increase rigidity. This means, for example, that the tab terminal thickness is 50
The thickness is about 0 μm, and the thickness of the metal shell is about 250 μm. When such a highly rigid tab terminal is formed integrally with a relatively weakly rigid metal shell, stress tends to concentrate on the base end of the tab terminal, and the tab terminal may be broken. That is, since the tab terminal is used in a manner projecting to the outside of the connector, it is desirable that the rigidity of the tab terminal be high. There was a dilemma. The tab terminals are plated to improve corrosion resistance. However, when the close bending is performed as described above, the tab terminals need to be plated in advance. However,
In the contact bending step, a part of the plating was easily peeled off, and as a result, there was a possibility that the corrosion resistance was poor.

[0004] The present invention has been made in view of the above-mentioned problems, and has a low failure rate during manufacturing, can increase both rigidity and breakage strength of tab terminals, and has excellent corrosion resistance. An object is to provide an electrical connector.

[0005]

Means for Solving the Problems As means for solving the above problems, the invention according to claim 1 has a base portion and a housing portion provided on the base portion. An electrical connector having a plurality of electrical signal transmission terminals mounted thereon, a metal shell mounted along a peripheral surface of an outer wall of the housing portion, and provided separately from the metal shell and connected to an external female terminal. And a tab terminal having a contact portion pressed by a metal shell and a holding means for holding the tab terminal on a base portion or a housing portion.

In this configuration, since the metal shell and the tab terminal are formed separately and are in contact with each other, the electrostatic discharge and the ground can be collectively performed via the tab terminal. Further, the rigidity and strength of the tab terminal can be sufficiently increased irrespective of the metal shell. Furthermore, since the tab terminal and the metal shell can be formed separately,
Processing is easy, and high positional accuracy is not required as in the case where both are integrally formed. As a result, the defect rate can be reduced. In addition, since the close contact bending of the tab terminal, which has been conventionally performed, can be eliminated, plating can be performed after the tab terminal is formed by sheet metal. As a result, corrosion resistance can be improved.

According to a second aspect of the present invention, in the first aspect, the tab terminal has a rectangular annular main body portion between the connection portion and the contact portion, and the holding means is formed on a base portion or a housing portion. Including a housing space for housing the main body,
The housing space is provided with a holding projection fitted into the main body. In this configuration,
Since the tab terminal has a rectangular ring-shaped main body and has a so-called box structure, high strength can be obtained. Also,
Since the high-strength rectangular annular main body is held from the inside and the outside by the inner surface of the housing space and the outer surface of the holding projection, the support strength of the tab terminal can be increased.

According to a third aspect of the present invention, in the first or second aspect, a pair of holding pieces for elastically holding an edge of the metal shell are formed at an end of the tab terminal, and each of the holding pieces is formed of the above-mentioned holding piece. It is characterized by including a contact portion. In this configuration, since a contact portion is provided on each of the pair of holding pieces of the tab terminal that elastically holds the edge of the metal shell, reliable contact and electrical continuity are ensured.

According to a fourth aspect of the present invention, in the first or second aspect, the metal shell includes a pair of joints joined to each other in a circumferential direction so as to form an annular shape. A pair of holding pieces for elastically holding the respective edges of the pair of joining portions of the metal shell are formed, and each holding piece includes the contact portion. In this configuration, the pair of joints of the metal shell are elastically held by the pair of holding pieces, respectively.
The joint portions can be prevented from separating from each other. In addition, since contact portions are provided on each of the two pairs of holding pieces, reliable contact and electrical conduction are ensured.

According to a fifth aspect of the present invention, in the third or fourth aspect, the holding means is arranged such that a gap between the pair of holding pieces of the tab terminal is flush with a peripheral surface of an outer wall of the housing portion. Is held. With this configuration, when assembling the present electrical connector, first, when the tab terminal is held by the holding means, the gap between the pair of holding pieces of the tab terminal is flush with the peripheral surface of the outer wall of the housing portion. Then, when the metal shell is fitted along the peripheral surface of the outer wall of the housing, the edge of the metal shell is automatically introduced into the gap between the pair of holding pieces of the tab terminal, and the assembly is completed.

[0011] The invention according to claim 6 is the invention according to claims 1 to 5.
In any one of the above aspects, the tab terminal is provided with a spring portion including the contact portion and elastically deformable in a pressing direction of the contact portion. In this configuration, since the contact portion is formed on the spring portion provided on the tab terminal, it is possible to ensure reliable contact and electrical conduction between the tab terminal and the metal shell.

The invention according to claim 7 provides the invention according to claims 1 to 6
In any one of the above, the power supply terminal and the ground terminal are mounted in the housing portion. In this configuration, the power supply terminal, ground terminal, and electric signal transmission terminal can be collectively held and shielded by a single electric connector, so that these terminals are held and shielded by separate connectors. Therefore, the structure can be significantly simplified.

The invention according to claim 8 is the first to sixth aspects.
In any one of the first to third aspects, the image forming apparatus is arranged in a main body of the image forming apparatus that develops using toner. In this configuration, the electrostatic prevention of the electric connector is achieved, so that the toner floating in the main body of the image forming apparatus can be prevented from adsorbing to the electric connector.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing an internal configuration of an image forming apparatus to which an electric connector according to an embodiment of the present invention is applied. Referring to FIG. 1, image forming apparatus 100 transmits reflected light from a document placed on document placing surface 101 to photosensitive drum 103 already charged by charger 102 via optical unit 104. The developing device 105 develops the electrostatic latent image formed on the photosensitive drum 103 into a toner image, and transfers the toner image from the paper cassette 106 to the paper transport path 10.
Transfer device 10 on a recording sheet 108 fed through
9 and a known configuration in which the toner image transferred onto the recording sheet 108 is fixed by a fixing device 110. 111 denotes a photosensitive drum 10 after transfer.
3 is a cleaning device that removes the toner remaining on the surface 3.

The above-described charger 102 and photosensitive drum 10
3. Process cartridge 11 partially covers developing device 105 and cleaning device 111 with cover 112.
3. This process cartridge 113
Is a mounting unit 115 fixed to the image forming apparatus main body 114.
, Can be inserted and mounted in a predetermined manner, and on the contrary, can be pulled out. The plug type electric connector 1 is fixed to the process cartridge 113, and the receptacle type electric connector 50 is fixed to the mounting portion 115 in the image forming apparatus main body 114. Both connectors 1 and 50 are configured as drawer connectors that are inserted and removed when the process cartridge 113 is inserted and removed.

The main features of this embodiment are as follows.
As described later, in an electrical connector of a type that achieves grounding and electrostatic discharge collectively by tab terminals,
The tab terminal and the metal shell are formed separately and connected to each other. Such features are applicable to both receptacle type and plug type connectors,
In the present embodiment, description will be given based on an example applied to a plug-type electrical connector.

FIGS. 2 and 3 are a perspective view and an exploded perspective view, respectively, of the plug-type electrical connector. FIG. 4 (a) is a plan view of the plug-type electrical connector, and FIG. 4 (b) is a plug-type electrical connector. FIG. FIG. 5 is a cross-sectional view taken along the line VV of FIG.
It is sectional drawing which follows the VI-VI line of (a). FIG. 2, FIG.
4 (a) and 4 (b), the plug-type electric connector 1 has a rectangular base 2, and the plug-type electric connector 1 is provided on the left and right sides of the back of the base 2. Is provided with a through hole 3 through which a fixing member such as a screw for attaching to a housing of an electric device (corresponding to a process cartridge 113 described later in the present embodiment).

A housing 4 is provided at the center of the surface of the base 2. The housing portion 4 has a rectangular cylindrical shape, and a terminal housing portion 5 having a rectangular cylindrical shape smaller than the housing portion 4 and slightly smaller than the housing portion 4 is provided therein.
Is provided. As shown in FIGS. 4A and 5, a pair of inner wall surfaces 5a, 5
In each of b, a plurality of electric signal transmission terminals 6 are provided side by side. These electric signal transmission terminals 6 are shown in FIG.
Are connected to a lead wire group 26 shown in FIG.

Referring to FIG. 4A and FIG.
In the housing part 4, a pair of power terminals 27, 27 and a pair of ground terminals 28, 28 are accommodated at positions near the four corners of the terminal accommodating part 5, respectively. The pair of power terminals 27, 27 are arranged in the vicinity of a pair of corners facing each other on the diagonal line of the terminal accommodating portion 5, and the pair of ground terminals 28, 28 are arranged in the vicinity of the corners of the other pair. Have been. Each of the terminals 27 and 28 has its upper half exposed in the housing part 4 in a state of being housed in the individual holding hole 32 in the protruding part 31 protruding below the housing part 4. 2
Reference numerals 9 and 30 denote lead wires connected to the power supply terminal 27 and the ground terminal 28 in the holding hole 32 and led out from the holding hole 32.

Referring to FIGS. 2, 3 and FIGS. 4 (a) and 4 (b), the outer peripheral surface 7 of the outer peripheral wall 7 of the housing portion 4 is described.
A rectangular ring-shaped metal shell 8 is attached so as to surround this along a. The metal shell 8 is formed by bending a long flat plate and joining a pair of joining portions 9 and 10 to each other to form a square ring along the outer wall 7 of the housing portion 4. Each of the spliced portions 9 and 10 is provided with a convex portion and a concave portion which undulate and engage with each other in an in-plane direction, respectively. Splicing is achieved by caulking the key points of the ten convex parts in the thickness direction and expanding them in the in-plane direction.

Referring to FIGS. 2 and 3, when the metal shell 8 is mounted on the housing portion 4, the metal shell 8 is opposed to the metal shell 8 so that the metal shell 8 is held by the housing portion 4. Stop pieces 11 cut and raised inward are formed on a pair of surfaces. On the other hand, referring to FIG. 3, shallow groove 12 is formed in outer wall 7 of housing portion 4 corresponding to the locus of stop piece 11 moving when metal shell 8 is mounted on outer wall 7 of housing portion 4. In the middle of the groove 12, a stopper fixing portion 13 formed of a projection that engages with the stopper 11 is formed.

On the other opposite surface of the metal shell 8, contact beams 14 are formed as extending pieces each of which is folded to form a U-shape. These contact beams 14 are formed by the metal shell 8. Is mounted on the outer wall 7 of the housing portion 4 and is disposed inside the housing portion 4 so as to protrude from the inner surface of the outer wall 7 as shown in FIGS. 4A and 4B. When the plug-type electrical connector 1 is mated with the receptacle-type electrical connector 50, the contact beams 14 have their respective U-shaped tops formed by a metal shell (see FIG. (Not shown).

The metal shell 8 has a housing section 4 with its tip facing the tip of the electric signal transmission terminal 6.
A tab terminal 16 which is attached to the metal shell 8 and can be connected to an external female terminal 15 is provided separately from the metal shell 8 and is held by the holding portion 17. 8 is fitted and connected to the edge (lower edge) on the base 2 side (see FIG. 8).

FIG. 7 is a partially exploded perspective view showing a tab terminal 16 and a holding portion 17 for holding the tab terminal.
FIG. 4 is a schematic view showing a state where the tab terminals 16 and the metal shell 8 are connected. Referring to FIG. 7, tab terminal 16 has a connection portion 19 for connecting to external female terminal 15 and a contact portion 20 pressed by metal shell 8 on both sides of square ring-shaped main body portion 18. ing.

Referring to FIG. 7 and FIG.
Are connected to a pair of joints 9 and 1 of the metal shell 8.
A pair of holding portions 21 for elastically holding the lower edge portions 9a and 10a of the first holding portion 21 are formed.
Is constituted by a pair of holding pieces 22 each having a U shape. Each of the holding pieces 22 includes the contact portion 20. Further, the pair of holding pieces 22,
Reference numeral 22 is adapted to hold the lower edge of the metal shell 8 in the direction of the plate surface, so that the metal shell 8 can be securely held in a manner resistant to deformation and the like.

Referring to FIGS. 5 and 7, the holding portion 17 is provided so as to extend over the lower portion of the housing portion 4 and the base portion 2. The holding portion 17 includes a holding portion 21,
21 and a housing space 23 that penetrates and exposes the connecting portion 19 in a state where the body portion 18 is housed therein. The housing space 23 has a rectangular cross section fitted into the square annular body portion 18. Are provided. The upper half of the holding projection 24 constitutes an elastic portion 24a branched into a bifurcated plate shape. Since the elastic portion 24a is tapered, the main portion 18 of the tab terminal 16 is formed.
When introduced into the device, it serves to guide the introduction smoothly.

On the peripheral surface of the outer wall 7 of the housing portion 4, a guide groove 25 for guiding the mounting of the tab terminal 16 into the accommodation space 23 is formed so as to extend downward from the upper edge of the outer wall 7. Since the width of the guide groove 25 is set to be equal to the width of the main body 18 of the tab terminal 16 and the width between the outer surfaces of the sandwiching portions 21 and 21, the tab terminal 16 is mounted in the accommodation space 23. At that time, it can be mounted smoothly.

Then, as shown in FIG.
Is held in the accommodation space 23, the gap s between the holding pieces 22, 22 of the tab terminal 16 is flush with the outer peripheral surface 7 a of the outer wall 7 of the housing portion 4. When the metal shell 8 is fitted from above along the peripheral surface of 7, the lower edge of the metal shell 8 is automatically introduced into the gap s between the pair of holding pieces 22 of the tab terminal 16, and the assembly is completed. I do.

Therefore, if the normal assembling operation of assembling the metal shell 8 into the housing portion 4 is performed, the assembling of the metal shell 8 and the tab terminals 16 can be automatically completed.
Assembly work can be performed very easily and reliably. In addition, at the time of this assembling, the tab terminals 16 are not only fitted in the main body 18 of the box structure in the housing space 23 but also fitted in the holding projections 24 in the main body 18 so as to be firmly held. Therefore, there is no breakage or abnormal deformation when combined with the metal shell 8.

As described above, in the present embodiment,
Since the metal shell 8 and the tab terminal 16 are formed separately and are in contact with each other, the electrostatic discharge and the ground can be collectively performed via the tab terminal 16. Further, it is possible to sufficiently increase the rigidity and strength of the tab terminal 16 irrespective of the metal shell 8. Further, since the tab terminal 16 and the metal shell 8 can be formed separately, processing is easy, and high positional accuracy is not required as in the case where the two 8, 16 are integrally formed. As a result, the product defect rate can be reduced.

When a metal shell and a tab terminal are integrally formed as in the prior art, a so-called close-bending sheet metal processing is performed to secure the rigidity of the tab terminal.
Since plating had to be performed before this sheet metal processing, plating peeling occurred during the sheet metal processing. On the other hand, in the present embodiment, the contact bending can be eliminated, and plating can be performed after sheet metal processing of the tab terminal. As a result, plating can be prevented from peeling off, so that corrosion resistance can be improved. .

The tab terminal 16 has a rectangular ring-shaped main body 1.
8 and a so-called box structure, so that high strength can be obtained. In addition, since the high-strength rectangular ring-shaped main body 18 is fitted to the holding projection 24 in the housing space 23, the support strength of the tab terminal 16 can be significantly increased. Thereby, the durability of the tab terminal 16 can be improved.

Further, a pair of holding pieces 22 of the tab terminal 16,
Since the lower edge portion of the metal shell 8 is elastically held between the metal shells 22 and the contact portion 20 is provided in this portion, reliable contact and electrical conduction are ensured. Further, since the pair of joints 9 and 10 of the metal shell 8 are elastically held by the pair of holding pieces 22, respectively, the joints 9 and 10 can be prevented from separating from each other. In addition, since the contact portions 20 are provided on each of the two pairs of holding pieces 22, more reliable contact and electrical conduction are ensured.

When assembling the plug-type electrical connector 1, when the metal shell 8 is fitted along the peripheral surface of the outer wall 7 of the housing portion 4, each of the pair of tab terminals 16 previously held in the accommodation space 23 is formed. Since it is automatically introduced into the gap s between the holding pieces 22, 22, the assembly is completed, the assembly is very simple. Each of the holding pieces 22... Provided on the tab terminal 16 is a spring portion which is cantilevered with the distal end side as a free end, and the contact portion 20 is formed on this spring portion. It can further contribute to secure contact between the metal shell 8 and the electric conduction.

Further, since the power supply terminal 27, the ground terminal 28, and the electric signal transmission terminal 6 are incorporated in a single electric connector (in this embodiment, a plug-type electric connector), a single housing portion 4 is used. These terminals 27,
28, 6 can be collectively held, and these terminals 27, 28, 6 can be collectively shielded using a single metal shell 8. Therefore, the structure can be significantly simplified as compared with the case where these terminals are held and shielded by separate connectors.

Further, the plug type electric connector 1 is incorporated in the main body 114 of the image forming apparatus, and the toner floating in the main body 114 of the image forming apparatus
Is reliably prevented by the antistatic effect. The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the contact portions 20 are provided at portions sandwiched by the pair of holding pieces 22 provided on the tab terminal 16. However, the present invention is not limited to such a sandwiching mode. For example, as shown in FIG. You may make it press elastically and ensure contact. Further, as shown in FIG. 10B, a bent portion 35 may be formed at the folded end.

Further, the present invention can be applied to a receptacle type electrical connector. Furthermore, the present invention is not limited to the image forming apparatus, and can be used for electric connectors of various electric devices. In addition, various changes can be made within the scope of the present invention.

[0038]

According to the first aspect of the present invention, the rigidity and breakage strength of the tab terminal can be sufficiently increased irrespective of the metal shell. In addition, since the tab terminal and the metal shell can be formed separately, processing is easy, and high positional accuracy is not required as in the case where both are integrally formed. As a result, the defective rate can be reduced. Furthermore, plating can be performed after the tab terminals are formed on the sheet metal, so that plating can be prevented from peeling off at the time of forming, so that corrosion resistance can be improved.

According to the second aspect of the present invention, since the tab terminal has a rectangular ring-shaped main body and has a so-called box structure, high strength can be obtained. In addition, by holding the inner and outer peripheries of the high-strength quadrangular main body, the support strength of the tab terminals can be increased. According to the third aspect of the present invention, since a contact portion is provided on each of the pair of holding pieces of the tab terminal for elastically holding the edge of the metal shell, reliable contact and electrical conduction are ensured.

According to the fourth aspect of the present invention, the pair of joining portions of the metal shell are elastically held by the pair of holding pieces, respectively, so that the joining portions can be prevented from separating from each other. In addition, since contact portions are provided on each of the two pairs of holding pieces, reliable contact and electrical conduction are ensured. According to the fifth aspect of the present invention, when assembling the electrical connector, when the tab terminal is first held by the holding means, the gap between the pair of holding pieces of the tab terminal becomes flush with the peripheral surface of the outer wall of the housing portion. Then, when the metal shell is fitted along the peripheral surface of the outer wall of the housing, the edge of the metal shell is automatically introduced into the gap between the pair of holding pieces of the tab terminal, and the assembly is completed.

According to the sixth aspect of the present invention, since the contact portion is formed on the spring portion provided on the tab terminal, it is possible to ensure reliable contact and electrical conduction between the tab terminal and the metal shell. According to the seventh aspect of the present invention, the power supply terminal, the ground terminal, and the electric signal transmission terminal can be collectively held and shielded by a single electric connector. Therefore, these terminals are held and shielded by separate connectors. The structure can be significantly simplified as compared with the case.

According to the eighth aspect of the present invention, since the electrostatic prevention of the electric connector is achieved, the toner floating in the image forming apparatus can be prevented from adsorbing to the electric connector.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an internal configuration of an image forming apparatus using an electric connector according to an embodiment of the present invention.

FIG. 2 is a perspective view of a plug-type electrical connector.

FIG. 3 is an exploded perspective view of the plug-type electrical connector.

4A is a plan view of a plug-type electrical connector, and FIG. 4B is a schematic front view of the plug-type electrical connector.

FIG. 5 is a vertical sectional view taken along line VV of FIG.

FIG. 6 is a sectional view taken along the line VI-VI in FIG.

FIG. 7 is an exploded perspective view of a tab terminal and a holding unit that holds the tab terminal.

FIG. 8 is a front view of a metal shell and a tab terminal connected to each other.

FIG. 9 is a partially cutaway side view of the plug-type electrical connector showing a step of attaching a metal shell with tab terminals attached.

FIGS. 10 (a) and (b) are schematic views respectively showing modified examples of a connection mode between a tab terminal and a metal shell.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug-type electrical connector 2 Base part 4 Housing part 7 Outer wall 7a Outer peripheral surface 8 Metal shell 9,10 Joint part 9a, 10a Lower edge part 15 Female terminal 16 Tab terminal 17 Holding part 18 Main body part 19 Connection part 20 Contact part 21 Nipping part 22 Nipping piece 23 Housing space 24 Holding projection 27 Power terminal 28 Ground terminal 33 Tab terminal 50 Receptacle type electric connector 100 Image forming apparatus 105 Developing apparatus 113 Process cartridge 114 Image forming apparatus main body 115 Mounting part T Toner

Claims (8)

[Claims] 1. An electric connector having a base portion and a housing portion provided on the base portion, wherein a plurality of electric signal transmission terminals are mounted in the housing portion, wherein a peripheral surface of an outer wall of the housing portion is provided. A metal shell mounted along, a tab terminal provided separately from the metal shell and having a connection portion for connecting to an external female terminal and a contact portion pressed by the metal shell; and An electrical connector comprising: a holding unit that holds the base unit or the housing unit. 2. The tab terminal has a rectangular ring-shaped main body between the connection part and the contact part, and the holding means includes a housing space formed in the base part or the housing part for housing the main body part, 2. The holding space is provided with a holding projection fitted into the main body.
Electrical connector as described. 3. The tab terminal according to claim 1, wherein a pair of holding pieces for elastically holding an edge of the metal shell are formed at an end of the tab terminal, and each holding piece includes the contact portion. 2. The electrical connector according to 2. 4. The metal shell includes a pair of seams joined together in a circumferential direction so as to form an annular shape, and an end of the tab terminal has an edge of each of the seams of the pair of seams of the metal shell. 3. The electrical connector according to claim 1, wherein a pair of holding pieces are formed for elastically holding the contact pieces, and each holding piece includes the contact portion. 5. The tab terminal according to claim 3, wherein the holding means holds the tab terminal such that a gap between the pair of holding pieces of the tab terminal is flush with a peripheral surface of an outer wall of the housing portion.
Electrical connector as described. 6. The tab terminal according to claim 1, wherein a spring portion including the contact portion and elastically deformable in a pressing direction of the contact portion is formed on the tab terminal. Electrical connector as described. 7. The electrical connector according to claim 1, wherein a power terminal and a ground terminal are mounted in the housing. 8. The electrical connector according to claim 1, wherein the electrical connector is arranged in a main body of an image forming apparatus that develops using a toner.