Contact type connector

Abstract

The invention discloses a contact type connector, which is assembled with a paired connector in a first direction and comprises an insulating shell and a plurality of contact pieces, and a plurality of contacts arranged in a second direction perpendicular to the first direction and held by the insulating housing, each of the contacts having a first contact portion for contacting a mating connector and a second contact portion for contacting a wiring substrate. Before contacting the wiring substrate, the second contact portion is inclined at an angle of 20 degrees or less with respect to a third direction perpendicular to the first direction and the second direction or is parallel to the third direction. The contact type connector is electrically connected with the wiring substrate in a contact manner, so that the contact type connector can be suitable for being configured on wiring substrates with different heights, and the position of the contact type connector relative to the wiring substrate in the height direction does not need to be strictly required.

Description

Technical Field

[0001] The present invention relates to a contact connector, particularly a contact connector that is electrically connected to a wiring substrate in a contact manner. Background Art

[0002] Taiwan, China Invention Patent Publication No. I565163B (Patent Document 1) discloses a Universal Serial Bus (USB) Type A socket connector. The connector disclosed in Patent Document 1 is fixed to a circuit board by soldering. In the case of using such a USB socket connector, the opening position of the corresponding USB connection hole on the electronic device housing determines the position of the circuit board, or rather, the position of the circuit board determines the opening position of the corresponding USB connection hole on the electronic device housing. Once the design developer wants to change the opening position or the circuit board position, different specifications of connectors must be used. Therefore, the connector manufacturer has to provide various specifications of connectors for different heights of the housing opening positions or different heights of the circuit board positions for the design developer to select according to the occasion.

[0003] Therefore, there is an expectation for a more versatile connector that can be used for housing opening positions or circuit board positions within a certain height range, so as to provide more design flexibility and convenience. Summary of the Invention

[0004] The present invention provides a contact connector to solve the above problems.

[0005] One object of the present invention is to provide a contact connector that can be electrically connected to a wiring substrate in a contact manner.

[0006] Another object of the present invention is to provide a contact connector in which, even if the contact connector is not fixed by soldering, each component of the contact connector can be firmly held without being prone to looseness or shaking.

[0007] According to an embodiment of the present invention, there is provided a contact connector for electrically connecting a mating connector as a first connection object and a wiring substrate as a second connection object, the contact connector including:

[0008] An insulating housing having a body portion and an extension portion that extends from the body portion in a first direction parallel to the assembly direction of the mating connector;

[0009] A plurality of contacts, which are arranged in a second direction perpendicular to the first direction and held by the insulating housing. Each contact has a first contact portion for contacting the mating connector, a holding portion held by the insulating housing, and a second contact portion for contacting the wiring substrate. The first contact portion is positioned at the extension portion, the second contact portion is opposite to the first contact portion and extends out of the body portion. The second contact portion is substantially linear and positioned parallel to the plane formed by the first direction and the third direction. The third direction is perpendicular to the first direction and the second direction. The second contact portion is inclined at an angle of 20 degrees or less with respect to the third direction or parallel to the third direction;

[0010] A conductive housing that at least surrounds the extension portion of the insulating housing and defines a space for receiving the mating connector; and

[0011] An insulating rear cover, at least a part of the second contact portion is exposed from the insulating rear cover for contacting the wiring substrate. The conductive housing is fixed to the insulating rear cover such that the body portion of the insulating housing is clamped by the conductive housing and the insulating rear cover;

[0012] Wherein, the insulating rear cover has a contact protection portion adjacent to the mounting surface of the contact type connector. When viewed from the second direction, the contact protection portion shields at least a part of each of the plurality of contacts.

[0013] For the contact type connector according to the present invention, the contact type connector further includes a metal fitting fixed to the conductive housing. The metal fitting includes a pair of flanges parallel to the mounting surface, and at least one through hole is formed in each flange.

[0014] For the contact type connector according to the present invention, the metal fitting is fixed to the conductive housing by welding.

[0015] For the contact type connector according to the present invention, each contact includes a second elastic arm and a bending portion extending from the body portion of the insulating housing. The second contact portion is connected to the second elastic arm through the bending portion, and the second elastic arm extends substantially in the third direction toward the mounting surface.

[0016] For the contact type connector according to the present invention, when viewed from the second direction, the bending portion and a part of the second contact portion are shielded by the contact protection portion, and the part of the second contact portion is adjacent to the bending portion.

[0017] For the contact type connector according to the present invention, the contact type connector further includes an insulator member received in the insulating rear cover. The insulator member is attached to the end portion of each of the plurality of contacts by insert injection molding, and the end portion continues from the second contact portion.

[0018] According to the contact connector of the present invention, the conductive housing is respectively formed with a first stopper portion at the trailing edge of the upper surface and a second stopper portion at the trailing edge of the lower surface, and the main body portions of the insulating housing are respectively formed with a first recess for receiving the first stopper portion and a second recess for receiving the second stopper portion at the upper edge and the lower edge.

[0019] According to another embodiment of the present invention, there is provided a contact connector for electrically connecting a mating connector as a first connection object and a wiring substrate as a second connection object to each other. The mating connector is assembled to the contact connector in a first direction. The contact connector includes:

[0020] an insulating housing; and

[0021] a plurality of contacts arranged in a second direction perpendicular to the first direction and held by the insulating housing. Each contact has a first contact portion for contacting the mating connector, a holding portion held by the insulating housing, and a second contact portion for contacting the wiring substrate. The second contact portion is linear and positioned parallel to a plane composed of the first direction and a third direction, and the third direction is perpendicular to the first direction and the second direction;

[0022] wherein, before the contact connector contacts the wiring substrate, the second contact portion is inclined at an angle of 20 degrees or less with respect to the third direction, so that when the contact connector contacts the wiring substrate, sufficient contact force between the second contact portion and the wiring substrate is ensured.

[0023] According to the contact connector of the present invention, the contact connector further includes an insulator member attached to the end portion of each of the plurality of contacts by insert injection molding, and the end portion extends from the second contact portion.

[0024] The contact connector according to the present invention can be applied to wiring substrates configured at different heights, without strictly requiring the position of the contact connector in the height direction with respect to the wiring substrate. This means that the installation position of the contact connector with respect to the wiring substrate has a certain flexibility.

[0025] Those with ordinary technical knowledge in the technical field to which the present invention pertains will be able to best understand the technical features and other purposes and advantages of the present invention after referring to the specification and drawings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of a contact connector according to a first embodiment of the present invention.

[0027] Figure 2 is another perspective view of a contact connector according to a first embodiment of the present invention.

[0028] Figure 3 It is an exploded perspective view of a contact type connector according to the first embodiment of the present invention.

[0029] Figure 4 It is a partial sectional side view of a contact type connector according to the first embodiment of the present invention.

[0030] Figure 5 It is a sectional side view of a contact type connector according to the first embodiment of the present invention.

[0031] Figure 6 It is a perspective view of the conductive housing of a contact type connector according to the first embodiment of the present invention.

[0032] Figure 7 It is a perspective view of the insulating housing of a contact type connector according to the first embodiment of the present invention.

[0033] Figure 8 It is a side view of the contact member of a contact type connector according to the first embodiment of the present invention.

[0034] Figure 9 It is a perspective view of the metal fitting of a contact type connector according to the first embodiment of the present invention.

[0035] Figure 10 It is a perspective view of a contact type connector according to the second embodiment of the present invention.

[0036] Figure 11 It is another perspective view of a contact type connector according to the second embodiment of the present invention. For clearly showing the internal details, the conductive housing, the metal fitting and the insulating rear cover are not shown.

[0037] Figure 12 It is a sectional side view of a contact type connector according to the second embodiment of the present invention.

[0038] Figure 13 It is a schematic diagram when the contact type connector of the present invention is actually used.

[0039] Description of Reference Numerals

[0040] 10: Contact type connector

[0041] 11: Insulating housing

[0042] 110: Body part

[0043] 111: Extension part

[0044] 1101: First recess

[0045] 1102: Second recess

[0046] 12: Conductive housing

[0047] 121: Holding part

[0048] 122: Protruding part

[0049] 123: First stop part

[0050] 124: Second stop part

[0051] 125: Upper contact arm

[0052] 126: Lower contact arm

[0053] 127: Side contact arm

[0054] 13: Insulating rear cover

[0055] 131: Contact protection part

[0056] 14: Contact

[0057] 140: First contact part

[0058] 141: First elastic arm

[0059] 142: Holding part

[0060] 143: Second elastic arm

[0061] 144: Bending part

[0062] 145: Second contact part

[0063] 146: End part

[0064] 15: Metal fitting

[0065] 150: Body part

[0066] 151: Flange

[0067] 152: Through hole

[0068] 20: Wiring board

[0069] 21: Electrode

[0070] 30: Housing

[0071] 31: Opening

[0072] D1: First direction

[0073] D2: Second direction

[0074] D3: Third direction

[0075] θ: Tilt angle. Detailed Implementation Manner

[0076] The following will describe the contact connector (hereinafter sometimes simply referred to as "connector") of the embodiment of the present invention with reference to the accompanying drawings. In each of the accompanying drawings, the same elements or elements with the same functions are labeled with the same reference numerals. The accompanying drawings are not drawn to scale.

[0077] Hereinafter, the contact connector of the present invention is specifically implemented in the form of a Type-A socket connector of USB 3.2 Gen2. It should be understood that the contact connector of the present invention is downward compatible with the specifications of USB 3.1 / 3.0 / 2.0 / 1.1, and can also be specifically implemented in the form of a socket connector of USB 3.1 / 3.0 / 2.0 / 1.1. The contact connector of the present invention is not limited to the Type-A socket connector of USB3.2 Gen2, but can be applied to other types of connectors. Since the definition and specification of the pin positions of the USB3.2 Gen2 socket connector are not the focus of the present invention and can be obtained from other published documents, the description thereof is omitted.

[0078] Figure 1 is a perspective view of the contact connector according to the first embodiment of the present invention, Figure 2 is another perspective view of the contact connector according to the first embodiment of the present invention, and Figure 3 is an exploded perspective view of the contact connector according to the first embodiment of the present invention. Referring to Figures 1 to 3 , the main constituent elements of the contact connector according to the first embodiment of the present invention are described. The entire contact connector is labeled with the element symbol 10. The contact connector 10 includes an insulating housing 11, a conductive outer shell 12, an insulating rear cover 13, a plurality of contacts 14, and a metal fitting 15.

[0079] The contact connector 10 is used to electrically connect a mating connector as a first connection object and a wiring board as a second connection object. The mating connector (not shown in the drawings) is assembled to the contact connector 10 in a first direction D1. In other words, the first direction is parallel to the assembly direction of the mating connector. The plurality of contacts 14 are arranged in a second direction D2 perpendicular to the first direction D1 and are held by the insulating housing 11. The insulating rear cover 13 has a plurality of positioning slots for limiting and separating the plurality of contacts 14 from each other.

[0080] Figure 4 is a partial cross-sectional side view of the contact connector according to the first embodiment of the present invention, and Figure 5 is a cross-sectional side view of the contact connector according to the first embodiment of the present invention. As shown in Figure 4 and Figure 5As shown, the conductive housing 12 is fixed to the insulating rear cover 13, and a part of the contact member 14 is exposed from the insulating rear cover 13 so as to contact the wiring board. Details of each component will be described below.

[0081] The insulating rear cover 13 has a contact protection portion 131 which is adjacent to the mounting surface of the contact type connector 10. When viewed from the second direction D2, the contact protection portion 131 shields at least a part of the contact member 14.

[0082] Figure 6 is a perspective view of the conductive housing 12. Reference will be made to Figure 6 to describe the structure of the conductive housing 12. The conductive housing 12 is made by stamping and bending a metal sheet. The conductive housing 12 defines a space for accommodating a mating connector.

[0083] Two upper contact arms 125 are formed on the upper surface of the conductive housing 12, and two lower contact arms 126 are formed on the lower surface of the conductive housing 12. One side contact arm 127 is formed on each of the two side surfaces of the conductive housing 12. When the mating connector is assembled to the contact type connector, these contact arms will contact the metal housing of the mating connector. Generally, these contact arms are provided for the purpose of grounding connection or increasing the holding force on the mating connector.

[0084] The conductive housing 12 is formed with a plurality of holding portions 121. Each holding portion 121 extends in the first direction from the trailing edge of the side surface of the conductive housing 12 and is inserted into a corresponding holding hole formed in the insulating rear cover 13 in an interference fit manner. A runway-shaped or oval-shaped protrusion 122 is formed at the base of each holding portion 121 to increase the interference of the conductive housing 12 with the insulating rear cover 13 and improve the resistance to pulling out the conductive housing 12 from the insulating rear cover 13.

[0085] In order to firmly clamp the insulating housing, a first stop portion 123 and two second stop portions 124 are respectively formed at the trailing edge of the upper surface and the trailing edge of the lower surface of the conductive housing 12. A part of the trailing edges of the upper and lower surfaces of the housing is torn and offset inward by stamping, thereby forming the inwardly recessed first stop portion 123 and second stop portions 124.

[0086] Figure 7 is a perspective view of the insulating housing 11. Reference will be made to Figure 7 to describe the structure of the insulating housing 11. The insulating housing 11 is made of a resin material or a polymer material by injection molding. Preferably, the insulating housing 11 and the contact member 14 are integrally formed by insert molding. In this way, the operation procedure of assembling the contact member can be saved.

[0087] The insulating housing 11 has a main body portion 110 and an extending portion (i.e., a tongue piece) 111. The extending portion 111 extends from the main body portion 110 in the first direction D1. The conductive outer shell 12 surrounds the extending portion 111 of the insulating housing 11. The insulating housing 11 is formed with a first recess 1101 at the upper edge of the main body portion 110 and two second recesses 1102 at the lower edge of the main body portion 110. The first stop portion 123 and the second stop portion 124 of the conductive outer shell 12 are respectively closely received in the first recess 1101 and the second recess 1102 correspondingly formed in the main body portion 110 of the insulating housing 11. By the first stop portion 123 and the second stop portion 124 abutting against the first recess 1101 and the second recess 1102, the clamping range of the insulating housing 11 can be enlarged, so that the insulating housing 11 is stably held relative to the conductive outer shell 12 or the insulating rear cover 13, and at the same time, the insulating housing 11 is prevented from shaking (oscillating) up and down or left and right.

[0088] Figure 8 is a side view of the contact member 14. Reference will be made to Figure 8 Describe the structure of the contact member 14. It should be understood that the contact members included in the contact-type connector according to the present invention are not limited to contact members of a single shape. For the convenience of describing the content of the present invention, only a contact member 14 of one shape will be described. It does not mean that the connector only has contact members of a single shape. As required, some of the contact members can be made in a different shape from another part of the contact members, but in principle, the parts of the contact members on the wiring board side are made in the same shape.

[0089] The contact member 14 is made of a conductive material (such as copper or copper alloy). The contact member 14 has a first contact portion 140 for contacting a mating connector, a first elastic arm 141, a holding portion 142 held by the insulating housing, and a second contact portion 145 for contacting the wiring board. The first contact portion 140 forms the first elastic arm 141 and is positioned at the extending portion 111 of the insulating housing 11. The first elastic arm 141 extends from the holding portion 142. The second contact portion 145 is opposite to the first contact portion 140 and protrudes from the main body portion 110 of the insulating housing 11.

[0090] The contact member 14 further includes a second elastic arm 143 extending from the main body portion 110 of the insulating housing 11, a bending portion 144, and an end portion 146 extending from the second contact portion 145. The second contact portion 145 is connected to the second elastic arm 143 through the bending portion 144. The second elastic arm 143 and the bending portion 144 of the contact member 14 can act as a spring portion to provide a resisting elastic force when the wiring board pushes the second contact portion 145 in the first direction D1.

[0091] The end portion 146 abuts against the inner surface of the insulating rear cover 13, such that the end portion 146 of the contact member 14 is positioned inside the insulating rear cover 13 and uniformly limited. As a result, a uniform exposure degree of the second contact portion 145 can be obtained. In addition, by the end portion 146 abutting against the inner surface of the insulating rear cover 13, the portion of the contact member on the wiring board side can be pre-pressed to increase the contact force when the second contact portion 145 contacts the wiring board.

[0092] The second elastic arm 143 extends substantially in the third direction D3 toward the mounting surface of the contact-type connector, but is not limited thereto. The second contact portion 145 is substantially linear and positioned parallel to the plane composed of the first direction D1 and the third direction D3, wherein the third direction D3 is perpendicular to the first direction D1 and the second direction D2. Although the second contact portion 145 can be parallel to the third direction D3, before the second contact portion 145 contacts the wiring board, it is preferable that the second contact portion 145 is inclined at an inclination angle θ with respect to the third direction D3 (i.e., the vertical direction). The inclination angle θ is preferably 3 degrees or less, more preferably 10 degrees or less, and particularly preferably 20 degrees or less. In this way, sufficient contact force can be ensured when the second contact portion 145 contacts the wiring board. Therefore, it is preferable that the second contact portion 145 is inclined with respect to the third direction D3.

[0093] The bent portion 144 of the contact member 14 and a part of the second contact portion 145 are shielded by the contact member protection portion 131. This part of the second contact portion 145 is adjacent to the bent portion 144. Since the bent portion 144 and its adjacent parts are more likely to yield and deform under an external force. In order to prevent the wiring board from colliding with the bent portion 144 and its adjacent parts when installing the contact-type connector or the wiring board, a contact member protection portion 131 adjacent to the mounting surface of the contact-type connector 10 is particularly formed on the insulating rear cover 13.

[0094] Figure 9 is a perspective view of the metal fitting of the contact-type connector according to the first embodiment of the present invention. Reference will be made to Figure 9 to describe the constitution of the metal fitting 15. The metal fitting 15 is fixed to the lower surface of the conductive housing 12 by welding, such as laser welding, but is not limited thereto. If necessary, the metal fitting can also be fixed to the upper surface of the conductive housing 12.

[0095] The metal fitting 15 has a main body portion 150 to be welded to the lower surface of the conductive housing 12 and a pair of flanges 151 parallel to the mounting surface of the contact-type connector. Each flange 151 is formed with a through hole 152 for the rod portion of a screw or bolt as a fastening means to pass through, so as to lock the metal fitting 15 to the pedestal. If necessary, positioning holes can be formed in the flanges 151 to accurately place the contact-type connector in a specified position before locking the metal fitting 15 to the pedestal.

[0096] Figure 10 It is a perspective view of the contact connector according to the second embodiment of the present invention. In the second embodiment, for the parts common to the first embodiment, the same reference numerals as those in the first embodiment are given and their descriptions are omitted. The main difference from the first embodiment is that the contact connector of the second embodiment further includes an insulating member 11A.

[0097] Figure 11 It is another perspective view of the contact connector according to the second embodiment of the present invention. For clearly showing the internal details, the conductive housing, metal fittings and insulating rear cover are not shown. Figure 12 It is a sectional side view of the contact connector according to the second embodiment of the present invention.

[0098] Compared with the first embodiment, the contact connector 10 of the second embodiment further includes an insulating member 11A. The insulating member 11A is generally a long member extending along the second direction D2. The insulating member 11A is formed integrally with the insulating housing 11 by insert injection molding, so that the insulating member 11A is integrally formed with the end portion of the contact member 14 by insert injection molding. Therefore, the insulating member 11A is formed of the same material as the insulating housing 11. By using the insulating member 11A, the end portion of the contact member 14 is forcibly confined within the insulating rear cover 13 and positioned uniformly, so that the second contact portion of the contact member 14 can be neatly and uniformly positioned.

[0099] Figure 13 It is a schematic diagram of the outline of the contact connector according to the present invention during actual use. The contact connector is installed inside an electric machine. In the drawing, the housing of the electric machine is partially shown, and the housing of the electric machine is labeled with the reference numeral 30. The wiring board as the second connection object is labeled with the reference numeral 20.

[0100] The housing 30 is formed with an opening 31, and the contact connector 10 is arranged such that the conductive housing 12 is embedded in the opening 31, so that the connection holes of the contact connector 10 are exposed outside the housing 30. The wiring board 20 is formed with a plurality of electrodes 21 at the edge portion, and these electrodes 21 are in conductive contact with the contact members 14 of the contact connector 10.

[0101] Since the contact members 14 of the contact connector 10 are not fixed to the wiring board by welding as in the conventional case, the position height of the wiring board is allowed to vary within a certain range. Therefore, there is no need to strictly require the relative positions of the opening in the housing and the wiring board.

[0102] Although the present invention is described and illustrated with reference to preferred embodiments, it should be understood that within the inventive concept and scope of the present invention, many variations and modifications can still be made by those with ordinary technical knowledge in the technical field to which the present invention pertains. Therefore, the present invention is not limited to the disclosed embodiments, but is based on the literal description in the claims. That is, equivalent variations and modifications made without departing from the claims of the present invention should still fall within the scope covered by the present invention.

Claims

1. A contact type connector, characterized in that: The contact type connector is used to electrically connect a mating connector as a first connection object and a wiring substrate as a second connection object to each other, and includes: An insulating housing having a main body portion and an extension portion, wherein the extension portion extends from the main body portion in a first direction parallel to an assembly direction of the mating connector; A plurality of contact members, the plurality of contact members are arranged along a second direction perpendicular to the first direction and are held by the insulating housing, each contact member having a first contact portion for contacting the mating connector, a holding portion held by the insulating housing, and a second contact portion for contacting the wiring substrate, the first contact portion being positioned at the extension portion, the second contact portion being opposite to the first contact portion and extending out of the main body portion, the second contact portion being substantially linear and positioned parallel to a plane formed by the first direction and a third direction, the third direction being perpendicular to the first direction and the second direction, and the second contact portion being parallel to the third direction or inclined at an angle of 20 degrees or less relative to the third direction; a conductive housing, surrounding at least the extension portion of the insulating housing and defining a space for accommodating the mating connector; and an insulating rear cover, at least a portion of the second contact portion is exposed from the insulating rear cover so as to contact the wiring substrate, the conductive housing is fixed to the insulating rear cover so that the main body of the insulating housing is clamped by the conductive housing and the insulating rear cover; The insulating rear cover has a contact protection portion, which is adjacent to the mounting surface of the contact-type connector. When viewed from the second direction, the contact protection portion shields at least a portion of each of the plurality of contacts.

2. The contact type connector as claimed in claim 1, wherein the contact type connector further comprises a metal fitting fixed to the conductive housing, the metal fitting comprising a pair of flanges parallel to the mounting surface, each flange being formed with at least one through hole.

3. The contact type connector as claimed in claim 2, wherein the metal fitting is fixed to the conductive housing by welding.

4. A contact-type connector as described in claim 1, wherein each contact member includes a second elastic arm and a bent portion extending from the main body of the insulating shell, the second contact portion is connected to the second elastic arm through the bent portion, and the second elastic arm extends toward the mounting surface in the third direction. 5 . The contact-type connector as claimed in claim 4 , wherein when viewed from the second direction, the bent portion and a portion of the second contact portion are shielded by the contact protection portion, and the portion of the second contact portion is adjacent to the bent portion.

6. The contact type connector as claimed in any one of claims 1 to 5, wherein the contact type connector further comprises an insulator component housed in the insulating rear cover, the insulator component being attached to a terminal portion of each of the plurality of contacts by insert injection molding, the terminal portion continuing from the second contact portion.

7. The contact type connector according to any one of claims 1 to 5, wherein the conductive housing has a plurality of retaining portions extending in the first direction, each retaining portion being inserted into a corresponding retaining hole formed in the insulating rear cover in an interference fit manner.

8. A contact type connector as described in any one of claims 1 to 5, wherein the conductive shell is respectively formed with a first stop portion and a second stop portion at the rear edge of the upper surface and the rear edge of the lower surface, and the main body of the insulating shell is respectively formed with a first recess for accommodating the first stop portion and a second recess for accommodating the second stop portion at the upper edge and the lower edge.

9. A contact type connector, characterized in that: The mating connector is used to electrically connect a first connection object to a wiring substrate as a second connection object, the mating connector being assembled to the contact type connector in a first direction, and the contact type connector comprises: insulating casing; and A plurality of contacts arranged along a second direction perpendicular to the first direction and held by the insulating housing, each contact having a first contact portion for contacting the mating connector, a holding portion held by the insulating housing, and a second contact portion for contacting the wiring substrate, the second contact portion being linear and positioned parallel to a plane formed by the first direction and a third direction, the third direction being perpendicular to the first direction and the second direction; Before the contact type connector contacts the wiring substrate, the second contact portion is inclined at an angle of less than 20 degrees relative to the third direction, so that when the contact type connector contacts the wiring substrate, sufficient contact force is ensured between the second contact portion and the wiring substrate. 10 . The contact type connector as claimed in claim 9 , further comprising an insulator member attached to a terminal portion of each of the plurality of contacts by insert injection molding, the terminal portion continuing from the second contact portion.

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