Lever type connector

Abstract: A lever type connector comprising first (1) and second (2) connectors to be connected with each other and a lever (3) pivotably mounted on the first connector (1). The first connector (1) defines an opening (1b) bounded by a peripheral portion (1c) for receiving the second connector therein. The lever (3) defines a pair of guide grooves (3c) and the second connector (2) has a pair of guide pins (5) engageable in the grooves (3c). In use, the lever (3) may be pivoted about the first connector (1) from a first position to a second position whereby the first and second connectors are urged together by cam action between the guide pins (5) and guide grooves (3c). The lever (3) has side portions (3a) which define the openings (3d) to the guide grooves and which in the first position of the lever (3) project outwardly from the peripheral portion (1c) of the first connector (1). The first connector (1) further comprises protecting wall formations (1f,1g) which integral with the peripheral portion (1c) and project therefrom in proximity with the location of the side portions (3a) of the lever (3) in the first position such that the lever (3) cannot be accidentally disengaged from the first connector (1).

Description: The present invention relates to a lever type connector and more particularly to the lever type connector comprising a pair of connectors connected with each other by using a lever supported by a pair of shafts projecting from one of the connectors, see e.g. EP-A-0 459 448. A great force is required to connect a plurality of connectors, for example, 20 or more with each other. Therefore, lever type connectors have been proposed to connect them easily by means of a lever which allows an operator to connect them by applying a relatively small force thereto. Referring to Figs. 5 through 7, an example of the above-described conventional lever type connector is described below. A pair of supporting shafts 4 and 4 projecting from both side surfaces la and la of a connector 1 is rotatably inserted into openings 3b and 3b formed on both side surfaces of a lever 3. A pair of guide pins 5 and 5 which engage guide grooves 3c and 3c of the lever 3 project from a connector 2. The lever 3 is rotated to move the connector 2 into the connector 1 so as to connect them with each other or move the connector 2 away from the connector 1 so as to disconnect them from each other from an opening portion 1b of the connector 1 due to the engagement between the guide pins 5 and 5 of the connector 2 and each of the guide grooves 3c and 3c of the connector 1. In the above-described lever type connector, as shown in Figs. 6 and 7, both sides 3a and 3a integral with the lever 3 are projected forward therefrom in a length (a) beyond the forward end 1c of the connector 1 in consideration of the configuration of the forward end 3d (refer to Fig. 5) of the guide groove 3c. The above-described lever type connector has, however, the following problem in installing it on an automobile or the like: As shown in Fig. 6, both sides 3a and 3a of the lever 3 are projected forward in the length (a) beyond the forward end 1c of the connector 1 as described above. Therefore, when an external force is applied to the connector 1 in a direction shown by an arrow (A), the side 3a is opened outward as shown by two-dot chain lines of Fig. 6. As a result, the shaft 4 disengages from the opening 3b and hence, the lever 3 falls away from the connector 1. It is an object of the present invention to provide a lever type connector, comprising a pair of connectors connected with each other by using a lever, capable of preventing a lever from being removed from one of the connectors. In accomplishing this and other objects, there is provided a lever type connector comprising: first and second connectors to be connected with each other, the first connector defining an opening bounded by a peripheral portion for receiving the second connector therein, a lever pivotably mounted on the first connector, the lever defining a pair of guide grooves, the second connector having a pair of guide pins engageable in the guide grooves whereby, in use, the lever may be pivoted about the first connector from a first position to a second position to urge the first and second connectors together by cam action between the guide pins and guide grooves, the lever having side portions defining openings to the guide grooves and which in the first position of the lever project outwardly from the peripheral portion of the first connector characterised in that the first connector further comprises protecting wall formations integral with the peripheral portion and projecting therefrom in proximity with the location of the side portions of the lever in the first position such that the protecting wall formations prevent any force which acts in a direction perpendicular to the side portions from moving the side portions away from the first connector. Therefore, the lever can be prevented from becoming disengaged from the first connector, which facilitates an operation for connecting the first and second connectors with each other. This construction allows the manufacturing cost of the lever type connector to be inexpensive because only the protecting wall integral with the first connector is projected. These and other objects and features of the present invention will become clear from the following description taken in conjunction with the preferred embodiments thereof with reference to the accompanying drawings, in which: Fig. 1 is a perspective view showing a lever type connector according to an embodiment of the present invention; Fig. 2 is a perspective view showing a female connector of the lever type connector shown in Fig. 1; Fig. 3 is a plan view showing the relationship between a lever and a protecting wall of the female connector; Fig. 4 is a side elevational view showing the lever and the protecting wall of the female connector shown in Fig. 3; Fig. 5 is a perspective view showing a conventional lever type connector; Fig. 6 is a plan view showing the relationship between a lever and female connector of a conventional lever type connector; and Fig. 7 is a side elevational view showing the conventional lever type connector shown in Fig. 5. Before the description of the present invention proceeds, it is to be noted that like parts are designated by like reference numerals throughout the accompanying drawings. Referring to the drawings, a lever type connector according to an embodiment of the present invention will be described below. As shown in Figs. 1 and 2, the lever type connector comprises a female connector 1 on which a lever 3 has been mounted. The female connector 1 is a multipolar connector having a plurality of terminal-accommodating chambers (not shown) arranged in parallel with each other. A male connector 2 (refer to Fig. 5) is inserted into the female connector 1 from an opening portion 1b thereof from the forward end of the opening portion 1b so as to connect the male connector 2 with the female connector 1. The lever 3 comprises a pair of sides 3a and 3a; and a connecting portion 3e which connects the sides 3a and 3a with each other. A pair of supporting shafts 4 and 4, integral with the female connector 1, projecting outward from the outer surfaces of a pair of side surfaces 1a and 1a of the female connector 1 is inserted into each of a pair of openings 3b and 3b formed on the sides 3a and 3a so that the lever 3 is rotatably supported on the female connector 1 by means of the supporting shafts 4 and 4. The lever 3 has on the inner surfaces of both sides 3a and 3a thereof a pair of guide grooves 3c and 3c, in a circular arc configuration, which are engaged by each of a pair of guide pins 5 and 5 (refer to Fig. 5) of the male connector 2. The female connector 1 has on both sides 1a and 1a thereof a pair of guide grooves 1d and 1d formed inward from the peripheral portion which forms the forward end 1c of the opening portion 1b. The guide pins 5 and 5 of the male connector 2 engage each of the grooves 1d and 1d so that the guide pins 5 and 5 move the male connector 2 into and out of the female connector 1 linearly. The sides 3a and 3a integral with the lever 3 are projected therefrom 3 in a length (a) beyond the peripheral position 1c of the female connector 1 in consideration of the configuration of the forward end 3d of the guide groove 3c as shown in Fig. 3. A pair of protecting side walls 1f and 1f integral with the female connector 1 are projected in a certain length beyond the peripheral portion 1c of the opening portion 1b. The protecting side walls 1f and 1f are disposed below the opening portion 1b and opposed to the projected portion, the length of which is (a) as described above. There are formed, on both sides of the bottom surface 1e of the female connector 1, a pair of protecting bottom walls 1g and 1g integral with each of the protecting side walls 1f and 1f. In installing the lever type connector having the above-described construction on an automobile or the like, with-the supporting shafts 4 and 4 of the female connector 1 inserted into each of the openings 3b and 3b of the lever 3 so as to rotatably support the lever 3 on the female connector 1 by means of the shafts 4 and 4, an external force applied to the female connector 1 in the direction shown by the arrow (A) as shown in Figs. 3 and 4 does not act on the side 3a but on the protecting side wall 1f of the female connector 1 or the protecting side wall 1g thereof. Consequently, the side 3a is not opened outward and thus the opening 3b can be prevented from being disengaged from the supporting shaft 4. That is, the lever 3 can be prevented from falling away from the female connector 1. Although the present invention has been fully described in connection with the preferred embodiments thereof the accompanying drawings, it is to be noted that various changes and modifications are apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart therefrom.

Claims: A lever type connector comprising: first (1) and second (2) connectors to be connected with each other, the first connector (1) defining an opening (1b) bounded by a peripheral portion (1c) for receiving the second connector (2) therein, a lever (3) pivotably mounted on the first connector (1), the lever (3) defining a pair of guide grooves (3c), the second connector (2) having a pair of guide pins (5) engageable in the guide grooves (3c) whereby, in use, the lever (3) may be pivoted about the first connector (1) from a first position to a second position to urge the first (1) and second (2) connectors together by cam action between the guide pins (5) and guide grooves (3c), the lever (3) having side portions (3a) defining openings (3d) to the guide grooves (3c) and which in the first position of the lever (3) project outwardly from the peripheral portion (1c) of the first connector (1) characterised in that the first connector (1) further comprises protecting wall formations (1f,1g) integral with the peripheral portion (1c) and projecting therefrom in proximity with the location of the side portions (3a) of the lever (3) in the first position such that the protecting wall formations (1f,1g) prevent any force which acts in a direction perpendicular to the side portions (3a) from moving the side portions (3a) away from the first connector (1). A lever type connector as claimed in claim 1 further characterised in that the lever (3) is pivotably mounted on the first connector 91) by means of support shafts (4) which project from the first connector (1) and rotatably engage in openings (3b) defined by the lever (3).

Inventors: HAYASHI HIROYUKI, HAYASHI, HIROYUKI, HAYASHI, HIROYUKI, C/O SUMITOMO WIRING SYSTEMS,LTD
Applicants: SUMITOMO WIRING SYSTEMS, SUMITOMO WIRING SYSTEMS, LTD.
Application year: 1993
Main classification: H01R13
IPC codes: H01R13