# Patent

## Title
Lever-type connector

## Abstract

Slide members in the lever-type connector are respectively provided with resilient latch arms and respectively have latching projections that latch on the corresponding drive projections during the temporary mating with the mating connector. Each of the resilient latch arms is formed between a pair of slits respectively extending from specified points which are located in the end portion of one of the cam grooves toward the corresponding entrance where the corresponding drive projection enters and on the side opposite from the side of the entry of the corresponding drive projection so as to undergo elastic deformation in the direction of thickness of the slide member.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of the filing date under 35 U.S.C. § 119(a)-(d) of Japanese Patent Application No. 2007-209483, filed Aug. 10, 2007.
FIELD OF THE INVENTION
The present invention relates to an electrical connector and more particularly to a lever-type electrical connector.
BACKGROUND
There are cases in which a connector having numerous contacts mates with a mating connector. Here, as the number of the contacts increases, the force required for mating the connectors is increased further and further. In order to reduce the mating force of these connectors, lever-type connectors have been known which are devised such that one connector is provided with a slide member having a cam groove that engages with a projection provided on a mating connector, and a lever that drives this slide member.
With such a lever-type connector, temporary mating between connectors is performed because there are cases in which the connectors break unless the lever is driven after being temporarily mated.
The lever-type connector shown in FIGS. 16 through 19 (see JP-A-09-115,605), for example, is known as such a lever-type connector. FIG. 16 is a side view showing a conventional lever-type connector and a mating connector prior to mating. FIG. 17 is a side view showing them temporarily mated. FIG. 18 is an enlarged view in the vicinity of the entrance of a cam groove at the time of the temporary mating. FIG. 19 is a partial sectional view along line 19-19 in FIG. 17.
The lever-type connector 101 shown in FIGS. 16 and 17 is designed to mate with a mating connector 150, and comprises a substantially rectangular housing 110 to which a plurality of contacts (not shown) are attached, a slide member 120, and a lever 130.
Here, as is shown in FIG. 19, the housing 110 has a cavity 115 that receives the mating connector 150. A pair of slide member receiving passages 111 extending in a direction orthogonal to the direction of mating are provided in the side walls of the housing 110. Legs of the slide member 120 are received in a movable manner in these slide member receiving passages 111.
A plurality of cam grooves 121 that respectively engage with drive projections 152 provided on the mating connector 150 are formed in the legs of the slide member 120 as shown in FIGS. 16 through 19.
The lever 130 is attached to the housing 110 so as to pivot about the pivoting shaft 131. The lever 130 causes the slide member 120 to move inside the slide member receiving passages 111 as a result of the pivoting. Specifically, the lever 130 pivots about the pivoting shaft 131 in the direction of arrow A from the initial position shown in FIG. 17 to the final position (not shown). Here, the lever 130 causes the slide member 120 to move forward (leftward in FIG. 17) from the initial position shown in FIG. 17 to the final position. Conversely, the lever 130 pivots about the pivoting shaft 131 in the direction opposite from the direction of arrow A from the final position to the initial position. Here, the lever 130 causes the slide member 120 to move rearward from the final position to the initial position.
In addition, a plurality of resilient latch arms 113 are provided on the lower end portions of the side walls of the housing 110 as shown in FIGS. 17 and 18. The positions in the forward-rearward direction of the housing 110 where the respective resilient latch arms 113 are provided are positions corresponding to the entrances of the respective cam grooves 121 when the slide member 120 is located in the initial position. As is shown in FIG. 18, slits 112 that pass through from the outer surfaces of the side walls of the housing to the slide member receiving passages 111 are formed on both the front and rear sides of the individual resilient latch arms 113, and each resilient latch arm 113 elastically deforms in the inward-outward direction (left-right direction in FIG. 19). A latching projection 114 that protrudes inward as shown in FIG. 19 is provided at the lower end portion of each resilient latch arm 113.
When the lever 130 and slide member 120 are in the initial position, the mating housing 151 of the mating connector 150 is inserted into the cavity 115 in the housing 110. Then, as is shown in FIG. 19, the latching projections 114 of the resilient latch arms 113 respectively ride over the drive projections 152 provided on the mating connector 150, and are positioned underneath the drive projections 152, and the drive projections 152 respectively enter the entrances of the cam grooves 121 formed in the slide member 120. This position is referred to as being temporarily mated. When temporarily mated, the drive projections 152 of the mating connector 150 are prevented from slipping out by the latching projections 114, so that the lever-type connector 101 is prevented from dropping out of the mating connector 150.
Furthermore, when temporarily mated, the lever 130 may then pivot to the final position in the direction of arrow A in FIG. 17. Then, the slide member 120 moves to the final position, and the lever-type connector 101 is pulled in toward the mating connector 150 in cooperation with the cam grooves 121 and drive projections 152, thus completing the mating between the two connectors 101 and 150.
However, this lever-type connector 101 is constructed such that the resilient latch arms 113 provided on the outer walls of the housing 110 elastically deform during temporary mating. Therefore, the rigidity of the housing 110 is low, and in cases where the insertion is to be performed at an angle with respect to the mating connector 150, there is a danger that the housing 110 will be expanded, so that the lever-type connector 101 will end up being diagonally inserted into the mating connector 150. If the lever 130 is caused to pivot such that the lever-type connector 101 is obliquely inserted into the mating connector 150, an excessive force is applied to the mating part, so that there is the risk of the two connectors 101 and 150 being destroyed.
On the other hand, in order to avoid lowering of the rigidity of the housing 110, if the housing 110 is not provided with any resilient latch arms 113, and instead, the latching projections 114 are provided on the lower end portions of the outer walls of the housing 110 or the lower end portions of the slide member 120, then the drive projections 152 of the mating connector 150 respectively contact the latching projections 114 and the housing 110 flexes on temporary mating. In this case, because the rigidity of the housing 110 is high, the force required for temporary mating is large, thus creating the problem of difficulty in the mating between the two connectors 101 and 150.
The lever-type connector shown in FIG. 20, for example, has been developed as a connector which prevents such oblique insertion into the mating connector 150 during temporary mating, and which avoids the difficulty in the mating between the two connectors 101 and 150. FIG. 20 is a sectional view cut along the forward-rearward direction, showing a state in which a conventional lever-type connector temporarily mates with a mating connector.
A pair of slide member receiving spaces 211 are formed in the housing 210 of the lever-type connector 201 shown in FIG. 20. A slide member 220 is installed in a movable manner in each of the slide member receiving spaces 211. A plurality of resilient latch arms 222 are provided on each slide member 220. Latching projections 223 that respectively latch on drive projections 252 provided on a mating housing 251 during temporary mating with a mating connector 250 are provided at the tip ends of the respective resilient latch arms 222.
These resilient latch arms 222 extend in the vertical direction in the rear portions (left portions in FIG. 20) of cam grooves 221 on the side of entrances 224 where the drive projections 252 respectively enter, and the resilient latch arms 222 elastically deform in an in-plane direction (in the forward-rearward direction) of the slide members 220.
Thus, as a result of the resilient latch arms 222 being provided on the slide members 220, the rigidity of the housing 210 is not lowered, so that diagonal insertion with respect to the mating connector 250 can be prevented during the temporary mating with the mating connector 250. Moreover, only the resilient latch arms 222 undergo elastic deformation during the temporary mating, and the insertion into the mating connector 250 does not have to cause any flexing of the housing 210. Accordingly, the mating operation of the two connectors 201 and 250 can be performed easily without requiring a large amount of force.
However, the following problems are encountered in this conventional lever-type connector 201 shown in FIG. 20. Specifically, the resilient latch arms 222 are constructed so as to elastically deform in an in-plane direction of the slide members 220, and in order to have the appropriate amount of displacement and elastic force at the time of the elastic deformation, a certain length is required in the vertical direction.
However, the installation positions of the resilient latch arms 222 are restricted by the positional relationship with the cam grooves 221. That is, the resilient latch arms 222 are installed by avoiding the cam grooves 221, so that the height of the slide members 220 (the length in the vertical direction) cannot be reduced.
SUMMARY
Accordingly, the present invention was devised in light of the problems described above. It is an object of the present invention, among others, to provide a lever-type connector that achieves both ease of mating and prevention of oblique insertion during temporary mating and that can also achieve a reduction in the height of the slide member, which in turn makes a low profile of this connector possible.
The lever-type connector of the invention has a housing having a contact, a slide member having a cam groove that engages with a drive projection provided on a mating connector, and a lever that drives the slide member. The slide member is provided with a resilient latch arm having a latching projection that latches on the drive projection during temporary mating with the mating connector. The resilient latch arm has a latching projection at the tip end thereof and is formed between a pair of slits respectively extending from specified points which are located in the end portion of the cam groove toward the entrance where the drive projection enters and on the side opposite from the side of the entry of the drive projection so as to elastically deform in the direction of thickness of the slide member.



BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described by way of example with reference to the accompanying figures of which:
FIG. 1A is a sectional view at initial mating which is cut along the forward-rearward direction;
FIG. 1B is a sectional view along line IB-IB in FIG. 1A;
FIG. 2A is a sectional view at temporary mating which is cut along the forward-rearward direction;
FIG. 2B is a sectional view along line 2B-2B in FIG. 2A;
FIG. 3A is a sectional view when mated which is cut along the forward-rearward direction;
FIG. 3B is a sectional view along line 3B-3B in FIG. 3A;
FIG. 4 is an exploded perspective view of the lever-type connector shown in FIGS. 1A through 3B;
FIG. 5A is a perspective view of the connector as seen from above at an angle from the right side surface, in which the lever is located in the initial position;
FIG. 5B is a perspective view of the connector as seen from below at an angle from the right side surface in which the lever is located in the initial position;
FIG. 6A is a perspective view of the connector as seen from above at an angle from the left side surface in which the lever is located in the initial position;
FIG. 6B is a perspective view of the connector as seen from below at an angle from the left side surface in which the lever is located in the initial position;
FIG. 7A is a front view of the connector;
FIG. 7B is a right side view of the connector;
FIG. 7C is a left side view of the connector;
FIG. 8A is a plan view of the connector in which the lever is located in the initial position;
FIG. 8B is a bottom view of the connector in which the lever is located in the initial position;
FIG. 8C is a rear view of the connector in which the lever is located in the initial position;
FIG. 9A is a perspective view as seen from above at an angle from the right side surface in which the lever is located in the final position;
FIG. 9B is a perspective view as seen from below at an angle from the right side surface in which the lever is located in the final position;
FIG. 10A is a perspective view as seen from above at an angle from the left side surface in which the lever is located in the final position;
FIG. 10B is a perspective view as seen from below at an angle from the left side surface in which the lever is located in the final position;
FIG. 11A is a front view of the connector in which the lever is located in the final position;
FIG. 11B is a right side view of the connector in which the lever is located in the final position;
FIG. 11C is a left side view of the connector in which the lever is located in the final position;
FIG. 12A is a plan view of the connector in which the lever is located in the final position;
FIG. 12B is a bottom view of the connector in which the lever is located in the final position;
FIG. 12C is a rear view of the connector in which the lever is located in the final position;
FIG. 13A is a perspective view of the left-side slide member as seen from below at an angle from the right side surface;
FIG. 13B is a perspective view of the left-side slide member as seen from above at an angle from the left side surface;
FIG. 13C is a front view of the left-side slide member;
FIG. 13D is a left side view of the left-side slide member;
FIG. 13E is a right side view of the left-side slide member;
FIG. 13F is a rear view of the left-side slide member;
FIG. 13G is a plan view of the left-side slide member;
FIG. 13H is a bottom view of the left-side slide member;
FIG. 14A is a perspective view of the right-side slide member as seen from below at an angle from the right side surface;
FIG. 14B is a perspective view of the right-side slide member as seen from above at an angle from the left side surface;
FIG. 14C is a front view of the right-side slide member;
FIG. 14D is a left side view of the right-side slide member;
FIG. 14E is a right side view of the right-side slide member;
FIG. 14F is a rear view of the right-side slide member;
FIG. 14G is a plan view of the right-side slide member;
FIG. 14H is a bottom view of the right-side slide member;
FIG. 15A is a perspective view as seen from above at an angle from the right side surface of a modified guide part showing the lever in the initial position;
FIG. 15B is a perspective view as seen from above at an angle from the right side surface of a modified guide part showing the lever located in the final position;
FIG. 16 is a side view showing a conventional lever-type connector and a mating connector that mates with this lever-type connector;
FIG. 17 is a side view showing a state in which the lever-type connector and mating connector shown in FIG. 16 temporarily mate with each other;
FIG. 18 is an enlarged view in the vicinity of the entrance of a cam groove when the lever-type connector and mating connector shown in FIG. 16 temporary mate with each other;
FIG. 19 is a partial sectional view along line 19-19 in FIG. 17; and
FIG. 20 is a sectional view cut along the forward-rearward direction, showing a state in which a conventional lever-type connector temporarily mates with a mating connector.



DETAILED DESCRIPTION OF THE EMBODIMENTS
An embodiment of the present invention will be described below with reference to the figures. As shown in FIGS. 1A through 3B, a lever-type connector 1 and a mating connector 50 mate with each other. The mating connector 50 comprises a substantially rectangular insulating mating housing 51 and a plurality of mating contacts 54 made of metal that are attached to the mating housing 51 as shown in FIGS. 1A through 3B. A mating part receiving recess 52 which receives a mating part 11 that is provided on the housing 10 of the lever-type connector 1 is formed in the interior of the mating housing 51. Furthermore, a plurality of drive projections 53 are formed on the outer surfaces of the left and right side walls (left and right side walls in FIG. 1B) of the mating housing 51.
As is shown in FIGS. 4 through 12C, the lever-type connector 1 comprises an insulating housing 10, a set of two slide members, left and right slide members 20a and 20b, and a lever 30.
The housing 10 comprises a substantially rectangular mating part 11 that is received inside the mating part receiving recess 52 in the mating connector 50 as clearly shown in FIG. 1B, and an outer housing part 12 that covers the periphery of the mating part 11 as clearly shown in FIGS. 1B and 8B. The housing 10 is formed by molding an insulating resin. A plurality of contacts (not shown in the Figures) is received in the mating part 11. Electrical wires (not shown in the figures) connected to the respective contacts are led out upward (upward in FIG. 1B) by passing through electrical wire lead-out holes 11a that are clearly shown in FIGS. 1B and 4. Furthermore, a left-side slide member receiving space 13a is formed on the inside of the left side wall 12a of the outer housing part 12 as clearly shown in FIGS. 1B, 5A, 6B, 7A, and 8C, while a right-side slide member receiving space 13b is formed on the inside of the right side wall 12b of the outer housing part 12 as clearly shown in FIGS. 1A, 1B, 5A, 6B, 7A, and 8C. The left-side slide member receiving space 13a and right-side slide member receiving space 13b respectively pass through the outer housing part 12 by extending in a direction orthogonal to the direction of mating with the mating connector 50, i.e., extending in the forward-rearward direction (direction orthogonal to the plane of page in FIG. 1B). Moreover, a pair of attachment parts 14 for the attachment of the lever 30 is formed at the upper end of the rear end portion (left end portion in FIG. 1A) of the housing 10 so as to protrude upward. Support parts 14a that respectively support the pivoting shafts 33 of the lever 30 are respectively provided on the attachment parts 14. In addition, as is shown in FIGS. 4 and 5A, temporary locking parts 18 onto which the temporary locking projections 36 of the lever 30 latch when this lever 30 is located in the initial position are respectively provided on the attachment parts 14. Furthermore, as is most clearly shown in FIG. 4, main locking parts 19 are provided at the upper end of the front portion of the housing 10, and main locking projections 35a provided on the lever 30 latch on these main locking parts 19 when this lever 30 is located in the final position. Moreover, as is most clearly shown in FIG. 4, a guide part 17 that guides the bundle of electrical wires that are led out from the electrical wire lead-out holes 11a upward is provided on the front portion of the housing 10. In addition, as is shown in FIGS. 5B and 6B, a plurality of introduction grooves 16a and 16b where the drive projections 53 provided on the mating connector 50 respectively enter are formed on the insides of the left side wall 12a and right side wall 12b, respectively, of the outer housing part 12 of the housing 10 along the forward-rearward direction of these side walls. Furthermore, as is most clearly shown in FIG. 1B, an annular seal 15 is provided around the mating part 11.
The guide part 17 is not limited to a case in which this guide part 17 guides the bundle of electrical wires that are led out from the electrical wire lead-out holes 11aupward, and may also be formed as a guide part 17′ that leads the bundle of electrical wires out in the forward direction (in the leftward direction in FIG. 15A) as shown in FIGS. 15A and 15B.
The set of two slide members, i.e., left and right slide members 20a and 20b, are respectively inserted into the left-side slide member receiving space 13a and right-side slide member receiving space 13b, and move in the forward-rearward direction between the initial position shown in FIGS. 1A and 2A and the final position shown in FIG. 3A. Only the right-side slide member 20b is shown in FIGS. 1A, 2A, and 3A.
Because the left-side slide member 20a and right-side slide member 20b are formed in shapes that show mirror symmetry as shown in FIG. 4, only the construction of the right-side slide member 20b will be described hereinafter.
The slide member 20b is formed by molding a resin material that has elasticity and high resistance to wear, such as PBT. The slide member 20b is formed substantially in a plate form as shown in FIGS. 4 and 14A through 14H. The slide member 20b is received inside the right-side slide member receiving space 13b as shown in FIGS. 1A, 2A, and 3A. A plurality of cam grooves 21b are formed in the inner surface of the slide member 20b as shown in FIGS. 14B and 14D. A drive projection 53 provided on the mating connector 50 engages with each of the cam grooves 21b as shown in FIGS. 1A, 2A, and 3A. Furthermore, as is shown in FIG. 1A, a plurality of entrances 25b are respectively provided for the cam grooves 21b, with these entrances 25b respectively facing the introduction grooves 16b formed in the housing 10 when the slide member 20b is located in the initial position. Each of the entrances 25b extends from an end portion of each cam groove 21b to the lower end edge of the slide member 20b, so that the corresponding drive projection 53 enters therefrom. Moreover, as is shown in FIGS. 1A and 14D, resilient latch arms 22b are provided on the slide member 20b, with each of these resilient latch arms 22b being formed between a pair of slits 24b, wherein slits 24b respectively extending from specified points A1 and A2 which are located in the end portion of one of the cam grooves 21b toward the corresponding entrance 25b and on the side (upper side) opposite from the side of the entry of the corresponding drive projection 53 (lower side). In the present embodiment, the specified points A1 and A2 are set at the upper end edge of the end portion of each cam groove 21b toward the corresponding entrance 25b. Each of the resilient latch arms 22b elastically deforms in the direction of thickness of the slide member 20b. As is shown in FIGS. 2A and 14D, latching projections 23b that latch on the corresponding drive projections 53 provided on the mating connector 50 are respectively provided at the tip ends of the resilient latch arms 22b. The respective latching projections 23b are positioned further toward the interior (upper side) of the end edge of the slide member 20b on the side of the entry of the drive projections 53 (lower side).
In addition, a latch arm 26b that is capable of elastic deformation is provided on the outer surface of the slide member 20b as shown in FIGS. 14A through 14G. This latch arm 26b latches on the right side wall 12b of the outer housing part 12 of the housing 10 when the slide member 20b is located in the initial position and final position. This prevents the lever 30 from wiggling around when the slide member 20b is located in the initial position and final position. Moreover, a groove 27b that extends from the upper end edge toward the center of the slide member 20b is formed in the outer surface of the slide member 20b as shown in FIGS. 4, 14A, and 14E. A drive pin 34 provided on the lever 30 shown in FIG. 4 enters this groove 27b. 
Furthermore, in FIGS. 4 and 13A through 13H, the symbol 21a indicates the cam grooves formed in the left-side slide member 20a, 22a indicates the resilient latch arms, 23a indicates the latching projections, 24a indicates the slits, 25a indicates the entrances of the cam grooves, and 26a indicates the latch arm.
Next, the lever 30 has both the function of driving both the left-side and right-side slide members 20a and 20b and the covering function which protects the bundle of electrical wires that are led out from the electrical wire lead-out holes 11a and which leads this bundle of electrical wires out toward the guide part 17. This lever 30 comprises a hood-type cover part 31 and a pair of extension parts 32 extending from either side of the cover part 31 as shown in FIG. 4. A pair of pivoting shafts 33 that is supported in a pivotable manner on the support parts 14a of the housing 10 is formed on the cover part 31 in the vicinity of the extension parts 32 so as to protrude inward. The lever 30 pivots from the initial position shown in FIG. 1A to the final position shown in FIG. 3A as a result of the pivoting shafts 33 being supported in a pivotable manner on the support parts 14a. In addition, a pair of drive pins 34 that enters the grooves 27a and 27b formed in the left-side and right-side slide members 20a and 20b are formed respectively on the extension parts 32 so as to protrude inward. When the lever 30 pivots from the initial position to the final position, the left-side and right-side slide members 20a and 20b are respectively pulled by the drive pins 34 from the initial position and move rearward to the final position. Conversely, when the lever 30 pivots from the final position to the initial position, the left-side and right-side slide members 20a and 20b are respectively pushed by the drive pins 34 from the final position and move forward to the initial position.
Furthermore, as is shown in FIG. 4, a pair of temporary locking projections 36 (only one is shown in FIG. 4) is formed on side surfaces of the cover part 31 of the lever 30 so as to protrude outward. These temporary locking projections 36 latch on the temporary locking parts 18 of the housing 10 when the lever 30 is in the initial position. Moreover, a pair of main locking arms 35 is provided on side surfaces of the cover part 31 of the lever 30 as clearly shown in FIG. 4. Main locking projections 35a that latch on the main locking parts 19 provided on the housing 10 when the lever 30 is in the final position are respectively formed at the ends of the main locking arms 35 on one side so as to protrude inward, while operating parts 35b are respectively provided at the other ends.
Next, operation of the lever-type connector I will be described. First, in a state in which the assembly of the lever-type connector 1 has been completed, the lever 30 and the left-side and right-side slide members 20a and 20b are located in the initial position as shown in FIGS. 1A and 1B (only the right-side slide member is shown in FIG. 1A). Because the left-side and right-side slide members 20a and 20b operate in the same manner, only the operation of the right-side slide member 20b will be described hereinafter.
In a state in which the slide member 20b is located in the initial position, the entrances 25b of the slide member 20b respectively face the introduction grooves 16b formed in the housing 10 as shown in FIG. 1A. The mating part 11 is inserted into the mating part receiving recess 52 of the mating connector 50 by moving the lever-type connector 1. Then, as is shown in FIGS. 1A and 1B, the mating housing 51 of the mating connector 50 enters the space between the mating part 11 and the outer housing part 12 of the lever-type connector 1, and the drive projections 53 provided on the right side of the mating housing 51 respectively pass through the introduction grooves 16b of the housing 10 and the entrances 25b of the slide member 20b, and are positioned just before the latching projections 23b of the resilient latch arms 22b. 
Moreover, when the lever-type connector 1 is moved further toward the interior, the latching projections 23b of the resilient latch arms 22b respectively ride over the corresponding drive projections 53 provided on the mating housing 51, and are positioned underneath the drive projections 53 as shown in FIGS. 2A and 2B. As a result, a temporarily mated state is assumed. When the latching projections 23b ride over the corresponding drive projections 53, the resilient latch arms 22b first elastically deform outward (toward one thickness direction of the slide member 20b), and then return to the original position after the latching projections 23b have ridden over the corresponding drive projections 53. When the resilient latch arms 22b are displaced outward, the resilient latch arms 22b undergo deformation inside the right-side slide member receiving space 13b (within the scope of the thickness of the slide member 20b), and therefore do not contact the right side wall 12b of the outer housing part 12. In addition, when the resilient latch arms 22b return to the original position as a result of the latching projections 23b having ridden over the corresponding drive projections 53, a clear clicking sound is produced, so that the worker can perceive the fact that the connector has reached the temporarily mated state without visually checking the connector. In this temporarily mated state, the latching projections 23b of the resilient latch arms 22b latch on the corresponding drive projections 53 provided on the mating housing 51, so that the lever-type connector 1 is prevented from dropping out.
Here, during the temporary mating with the mating connector 50, the resilient latch arms 22b provided on the slide member 20b undergo elastic deformation, and the latching projections 23b latch on the corresponding drive projections 53 of the mating connector 50, so that the rigidity of the housing 10 is not lowered. Therefore, oblique insertion into the mating connector 50 can be prevented when the connector is temporarily mated with the mating connector 50. Furthermore, during this temporary mating, the resilient latch arms 22b that have the latching projections 23b at the tip ends thereof undergo elastic deformation, so that there is no need to provide any latching projection at the end portion of the housing 10 or at the end portion of the slide member 20b, and because it is not necessary to cause any flexing of the housing 10 by the insertion into the mating connector 50, the mating operation can be performed easily without requiring a large amount of force.
In addition, each of the resilient latch arms 22b is formed between the pair of slits 24b, wherein slits 24b respectively extending from the specified points A1 and A2 which are located in the end portion of one of the cam grooves 21b toward the corresponding entrance 25b where the corresponding drive projection 53 enters and on the side opposite from the side of the entry of the corresponding drive projection 53, so that these resilient latch arms 22b elastically deform in the direction of thickness of the slide member 20b. Specifically, each of the resilient latch arms 22b is formed between the pair of slits 24b, wherein slits 24b respectively extending from the specified points A1 and A2 which are set in the end portion of one of the cam grooves 21b toward the corresponding entrance 25b and at the upper end edge of this end portion, thus being installed inside this cam groove 21b. Furthermore, the resilient latch arms 22b elastically deform in the direction of thickness of the slide member 20b. Therefore, the necessary amount of displacement of the resilient latch arms 22b is ensured within the scope of the thickness of the slide member 20b by setting the thickness of the slide member 20b larger than the thickness of the conventional slide member (the thickness of the slide member 220 shown in FIG. 20), so that there is no need to increase the length of the resilient latch arms 22b in the vertical direction. Consequently, the height of the slide member 20b (the length in the vertical direction) can be reduced, which makes it possible to reduce the size of the lever-type connector 1.
Furthermore, as a result of the resilient latch arms 22b being installed inside the cam grooves 21b and constructed so as to undergo elastic deformation in the direction of thickness of the slide member 20b, the degree of freedom in the design of the resilient latch arms 22b is increased. Consequently, the portions of the entrances 25b of the cam grooves 21b of the slide member 20b (portions from the lower end edge of the slide member 20b to the upper end edges of the cam grooves 21b) can be made shorter than in the conventional example shown in FIG. 20. Accordingly, not only can the height of the slide member 20b be reduced, but the necessary mating length or stroke can also be ensured while reducing the lever pivoting nucleus from the initiation of the operation of the lever 30 to the beginning of the exhibition of the multiplied force effect, the result being a reduction in free running distance.
Moreover, because the degree of freedom in the design of the resilient latch arms 22b is increased, the resilient latch arms 22b can be constructed more flexibly than in the conventional example shown in FIG. 20. Therefore, the durability of the latching projections 23b and drive projections 53 can be increased.
In addition, because the resilient latch arms 22b elastically deform in the direction of thickness of the slide member 20b, when the latching projections 23b of the resilient latch arms 22b ride over the corresponding drive projections 53 provided on the mating housing 51, these latching projections 23b ride over while sliding over the tops of the drive projections 53. In the conventional example shown in FIG. 20, the resilient latch arms 222 elastically deform in an in-plane direction of the slide member 220, so that the latching projections 223 ride over while sliding over the side surfaces of the drive projections 252. Because the side surfaces of the drive projections 252 constitute the sliding surfaces with the cam grooves 221, it is not desirable to damage the sliding surfaces with the cam grooves 221 by the latching projections 223 sliding over these side surfaces of the drive projections 252. In the present embodiment, on the other hand, the latching projections 23b ride over the tops of the drive projections 53, so that there is no such drawback.
Furthermore, the latching projections 23b of the resilient latch arms 22b are positioned further toward the interior than the end edge of the slide member 20b on the side of the entry of the drive projections 53, so that respective spaces can be ensured from the time when the insertion into the mating connector 50 begins until the time when the latching projections 23b contact the corresponding drive projections 53. Accordingly, the physical sensation and clicking sound are perceived more clearly when the temporarily mated state is reached as a result of the latching projections 23b of the resilient latch arms 22b riding over the corresponding drive projections 53 than in a case in which the latching projections 23b are provided on the same plane as the end edge of the slide member 20b on the side of the entry of the drive projections 53.
Next, when the lever 30 is caused to pivot to the final position in the direction of arrow X in FIG. 2A following the confirmation of the temporarily mated state, the slide member 20b is pulled by the drive pins 34, and moves rearward to the final position. As a result, the drive projections 53 respectively slide inside the cam grooves 21b, and are pulled into the final position of the cam grooves 21b, thus completing mating of the lever-type connector 1 with the mating connector 50 as shown in FIG. 3A. Consequently, the respective contacts of the lever-type connector 1 and the mating contacts 54 of the mating connector 50 make contact with each other, and the electrical connection is established.
Meanwhile, when the lever 30 pivots from the final position to the initial position in the direction opposite from arrow X in FIG. 2A, the slide member 20b operates in the opposite manner from what has been described, so that the lever-type connector 1 is released from the mating connector 50.
Here, the angle of the cam grooves 21b can be reduced by causing the latching projections 23b of the resilient latch arms 22b to be positioned further toward the interior than the end edge of the slide member 20b on the side of the entry of the drive projections 53, compared to the case in which the latching projections 23b are installed on the same plane as the end edge of the slide member 20b on the side of the entry of the drive projections 53. Therefore, it is possible to obtain the effects of reducing damage caused by repeated attachment and detachment of the connector and of increasing the durability.
Moreover, because the latching projections 23b of the resilient latch arms 22b are positioned further toward the interior than the end edge of the slide member 20b on the side of the entry of the drive projections 53, the temporarily mated state can be perceived easily, so that it is possible to avoid the erroneous operation of the slide member 20b caused by the operation of the lever 30. Specifically, if the latching projections 23b of the resilient latch arms 22b are located at the same position as the end edge of the slide member 20b on the side of the entry of the drive projections 53, the respective clearances from the latching of the latching projections 23b on the corresponding drive projections 53 to the entry of the drive projections 53 into the cam grooves 21b are large, so that even when the lever 30 is operated in this state, the initial operating load is small. In contrast, if the latching projections 23b of the resilient latch arms 22b are positioned toward the interior of the end edge of the slide member 20b on the side of the entry of the drive projections 53, the respective clearances from the latching of the latching projections 23b on the corresponding drive projections 53 to the entry of the drive projections 53 into the cam grooves 21b are small, so that the operating load is large from the beginning when the lever 30 is operated in this state. Accordingly, the temporarily mated state can be perceived easily, which makes it possible to avoid erroneous operation of the slide member 20b caused by the operation of the lever 30.
An embodiment of the present invention has been described above. However, the present invention is not limited to this embodiment, and various alterations or modifications can be made.
For example, the slide member is not limited to the case of constructing a pair of left-side and right-side slide members 20a and 20b formed in shapes that show mirror symmetry; the slide member may also be constructed from a single unit in which the left-side and right-side slide members 20a and 20b are integrated.
Furthermore, it is sufficient if the lever 30 possesses the function of driving the slide members 20a and 20b, and it is not absolutely necessary to have the function of protecting the bundle of electrical wires that are led out from the electrical wire lead-out holes 11a and leading out this bundle of electrical wires to the guide part 17. In this case, it is preferable to provide a separate wire cover that protects the bundle of electrical wires led out from the electrical wire lead-out holes 11a and that leads this bundle of electrical wires out to the guide part 17.
Moreover, it is sufficient if the specified points A1 and A2 are positioned in the end portion of each of the cam grooves 21b toward the corresponding entrance 25b and on the side (upper side) opposite from the side of the entry of the corresponding drive projection 53 (lower side); it is not absolutely necessary to set these specified points A1 and A2 at the upper end edge of the end portion of each cam groove 21b toward the corresponding entrance 25b.

## Claims

1. A lever-type connector comprising:
a housing having a contact;
a slide member having a cam groove that receives a drive projection of a mating connector on a side;
a lever that drives the slide member;
a resilient latch arm located on the slide member and being formed between a pair of slits respectively extending from specified points located in an end portion of the cam groove toward an entrance where the drive projection enters and on a side opposite from the side of entry of the drive projection so as to elastically deform in a direction of thickness of the slide member; and,
a latching projection located at an end of the resilient latch arm such that it latches on the drive projection during temporary mating with the mating connector.

2. The lever-type connector of claim 1, wherein the latching projection of the resilient latch arm is positioned further toward the interior than an end edge of the slide member.

3. The lever-type connector of claim 1, wherein the slide member is received inside slide member receiving spaces of the housing.

4. The lever-type connector of claim 2, wherein the cam groove is formed on an inner surface of the slide member.

5. The lever-type connector of claim 2, wherein the entrance faces an introduction groove of the housing when the slide member is located in an initial position.

6. The lever-type connector of claim 1, wherein the specified points are set at an upper end edge of an end portion of the cam groove.

7. The lever-type connector of claim 1, further comprising a second latch arm located on an outside of the slide member for latching to a side wall of the housing.

8. The lever-type connector of claim 4, further comprising a groove formed on an outer surface of the slide member and extending from an edge toward a center thereof.

9. The lever-type connector of claim 8, wherein the groove receives a drive pin of the lever.