JP4786496B2 - Terminal equipment - Google Patents

Description

  The present invention relates to a terminal device having a terminal screw.

  Some terminal blocks can temporarily fix the terminal screw before the terminal screw is screwed into the screw hole of the connecting conductor and tightened. For example, in the terminal block disclosed in FIG. 3 of Patent Document 1, the terminal screw can be temporarily fixed by applying a spring action from the lateral direction to the leg portion of the holding member that holds the terminal screw. .

Japanese Utility Model Publication No. 60-92472

  However, in the terminal block of the above-mentioned Patent Document 1, the above-described spring action always works at the terminal screw temporary fixing position. Therefore, even if the terminal screw attached to the screw hole is unscrewed, it is attempted to return to the top position. There is a problem that the terminal screw stops at the temporary fixing position and does not return to the top position.

  On the other hand, a terminal block that can be returned to the top position by the biasing force of a coil spring when the screwing of the terminal screw is released is disclosed, for example, in FIG. However, with this terminal block, the above-described terminal screws cannot be temporarily fixed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a terminal device that can temporarily fix a terminal screw and return to the top position when the screwing of the terminal screw is released.

  In order to solve the above-mentioned problems, the invention of claim 1 is a terminal device, wherein (a) a terminal screw and (b) a screw hole having conductivity and screwable with the terminal screw are formed. (C) a holding member that has a predetermined protrusion and rotatably holds the terminal screw, and (d) a wall surface on which a guide groove that guides the predetermined protrusion is formed along a predetermined direction. And (e) an urging means for applying an urging force to the holding member for directing the terminal screw toward the top position along the predetermined direction, and resists the urging force from the top position. Then, the holding member shifts from the upright posture to the inclined posture in accordance with the pressing operation to push down the terminal screw, so that the predetermined protrusion comes out of the guide groove and is locked to the predetermined locking portion. The terminal screw corresponding to the locking position. When the holding member returns from the inclined posture to the upright posture in accordance with the operation of moving the tip of the terminal screw from the stop position to the inlet of the screw hole, the predetermined protrusion is moved from the lock position. Return to the guide groove.

  According to a second aspect of the present invention, in the terminal device according to the first aspect of the present invention, a locking projection that engages with the predetermined protrusion is provided on the wall surface as the predetermined locking portion. Due to the pressing operation, the predetermined protrusion reaches a locking projection by going up a predetermined slope from the guide groove.

  According to a third aspect of the present invention, in the terminal device according to the first or second aspect of the present invention, a predetermined chamfer is applied to the inlet of the screw hole.

  According to a fourth aspect of the present invention, in the terminal device according to any one of the first to third aspects, the screw hole is threaded along the predetermined direction.

  According to a fifth aspect of the present invention, in the terminal device according to any one of the first to fourth aspects of the present invention, the holding member has a cross section having an L shape with respect to a cross section parallel to the wall surface. ing.

  The invention of claim 6 is the terminal device according to any one of claims 1 to 5, wherein from the top position, the terminal screw is moved to the temporary fixing position; It is possible to select a second operation in which the terminal screw is linearly moved along the predetermined direction to the entrance of the screw hole.

  According to the first to sixth aspects of the present invention, the holding member for the terminal screw shifts from the upright posture to the inclined posture in accordance with the pressing operation of pushing down the terminal screw against the biasing force of the biasing means from the top position. Thus, the predetermined protrusion of the holding member can move out of the guide groove formed along the predetermined direction and move to the locking position locked by the predetermined locking portion. When the holding member returns from the inclined position to the upright position in accordance with the operation of moving the tip of the terminal screw from the temporary fixing position of the terminal screw corresponding to the stopping position to the entrance of the screw hole of the conductor portion, the predetermined protrusion is Return from the locking position to the guide groove. As a result, the terminal screw can be temporarily fixed and can be returned to the top position by releasing the screwing of the terminal screw into the screw hole of the conductor portion.

  In particular, in the invention of claim 2, the predetermined protrusion rises from the guide groove and reaches the locking projection provided on the wall surface by the pressing operation, so that the terminal screw is moved from the top position. It can move smoothly to the temporary fixing position.

  In the invention of claim 3, since the predetermined chamfering is given to the inlet of the screw hole, the terminal screw can be easily guided from the temporary fixing position to the inlet of the screw hole.

  In the invention of claim 4, since the screw hole is threaded along a predetermined direction, it is easy to return to the top position when the screwing of the terminal screw is released.

  Further, in the invention of claim 5, since the holding member has a cross section having an L shape with respect to a cross section parallel to the wall surface, the holding member can easily shift to an inclined posture by pressing the terminal screw. .

  In the invention of claim 6, from the top position, a first operation for moving the terminal screw to the temporary fixing position and a second operation for linearly moving the terminal screw to the screw hole along a predetermined direction. The convenience can be improved.

<About terminal block configuration>
FIG. 1 is a perspective view showing a main configuration of a terminal block 1 according to an embodiment of the present invention. FIG. 2 is a front view showing a main configuration of the terminal block 1.

  A terminal block (terminal device) 1 is, for example, a main body 10 made of plastic, two terminal screws 11, a conductive metal connection conductor 12, and a holder for holding each terminal screw 11 rotatably. A metal fitting 13 (13R, 13L) and a coil spring 14 connected to the lower end portion of the holding metal fitting 13 and biasing the holding metal fitting 13 upward (+ Y direction) are provided. A large number of terminal blocks 1 having such a configuration are arranged to form a relay terminal block 100 as shown in FIG.

  The connecting conductor (conductor portion) 12 is threaded along the Y-axis direction to form two screw holes 12h that can be screwed with the terminal screws 11, and the inlet IN of the screw hole 12h is chamfered. It has been subjected. If a round crimp terminal or the like is tightened with the terminal screw 11 in each screw hole 12h of the connection conductor 12, an electrical connection between the crimp terminals (cables connected thereto) is made.

  The two holding metal fittings 13 (13L, 13R) are made of metal and have a cross section having an L shape with respect to a cross section parallel to a wall surface (reference plane Fr) of a back wall 10a described later (see FIG. 2). Specifically, the holding metal fitting 13 has an upper plate portion 13 a provided with a hole for holding the terminal screw 11, and a leg portion 13 b extending vertically downward (−Y direction) from the end portion of the upper plate portion 13. is doing.

  FIG. 4 is a diagram illustrating a side surface of the holding metal fitting 13R viewed in the (−X) direction.

  In the holding metal fitting 13R, a trapezoidal protrusion 13p is formed in the leg portion 13b. In addition, recesses Qa and Qb for holding the upper end of the coil spring 14 are formed at the lower end of the leg 13b of the holding metal 13R. Note that the holding metal fitting 13L also has the same configuration as that of the holding metal fitting 13R shown in FIG.

  Returning to FIGS.

  The main body 10 includes a back wall 10a that acts as a boundary between adjacent terminal blocks 1 when a large number of terminal blocks 1 are arranged side by side as shown in FIG. And two conductor support portions 10c projecting on the back wall 10a to support both ends of the connection conductor 12. The connection conductor 12 is fixed to the main body portion 10 by sandwiching the connection conductor 12 between the conductor support portion 10c and the central protruding portion 10b.

  FIG. 5 is a diagram for explaining the configuration of the main body 10. In FIG. 5, the left half of the main body 10 from the central axis AX toward the paper surface in the main body 10 shown in FIG. 2 is shown.

  The back wall 10a has an inner wall surface in which guide grooves GV (shaded portions) for guiding the protrusions 13p of the holding metal fitting 13 are formed along the vertical direction (Y-axis direction). That is, a guide groove GV having a certain depth from the reference surface Fr of the inner wall surface is provided in the back wall 10a as shown in FIG.

  Further, on the back wall 10a, a locking projection PV that engages with the protrusion 13p of the holding metal 13 is provided as a locking portion on the reference surface Fr of the inner wall surface. When the protrusion 13p of the holding metal fitting 13 biased upward (+ Y direction) by the coil spring 14 is hooked at the position (locking position) Q with respect to the locking protrusion PV, the protrusion 13p is semi-fixed. The When the protrusion 13p of the holding metal 13 is engaged with the locking projection PV, the holding metal 13 is in the inclined posture Wt (FIG. 8) as will be described later, but the holding metal 13 is prevented from being excessively inclined. A protrusion PS as a stopper is provided on the back wall 10a.

  Further, as shown in FIG. 4, the back wall 10a has a slope SL (shaded portion in FIG. 5) for connecting the bottom surface (lower stage) of the guide groove GV and the reference surface (upper stage) Fr of the locking projection PV. Is provided.

  The operation of the terminal block 1 having the above configuration will be described.

<Operation of terminal block 1>
6 to 11 are diagrams for explaining the operation of the terminal block 1. Here, FIGS. 6A to 11A show the terminal block 1 in the left half from the central axis AX toward the paper surface in the terminal block 1 shown in FIG. 2, and FIGS. 11 (b) shows cross sections viewed from the VI-VI position to the XI-XI position in FIGS. 6 (a) to 11 (a). In addition, in FIGS. 6-11, each state of the terminal block 1 accompanying the operation | movement of the operator who removes the terminal screw 11 after fastening a crimp terminal etc. on the connection conductor 12 using the terminal screw 11 is shown. . Below, each state of this terminal block 1 is demonstrated in detail.

(1) Initial State of Terminal Screw 11 As shown in FIG. 6, the initial state of the terminal screw 11 is the upright posture Wr of the holding metal fitting 13 in which the terminal screw 11 is at the top position Bt and the leg portion 13b is parallel to the Y axis. It is a state. At the top position Bt of the terminal screw 11, the protrusion 13p of the holding metal 13 is engaged with the upper end GVt (FIG. 4) of the guide groove GV by the urging force from the coil spring 14, as shown in FIG.

(2) The terminal screw 11 is tilted forward The terminal screw 11 is tilted forward as shown in FIG. 7 when the legs 13b of the holding metal 13 are supported by the vicinity of the recesses Qa and Qb (see FIG. 4) of the holding metal 13. The terminal screw 11 is tilted in the (−X) direction by tilting with respect to the Y axis. That is, the protrusion 13p of the holding fitting 13 is pushed out of the guide groove GV as the operator pushes down the terminal screw 11 downward DN against the biasing force of the coil spring 14 from the top position Bt (FIG. 6) of the terminal screw 11. This is a stage in which the holding fitting 13 is gradually inclined in the (−X) direction by going up the slope SL (see FIGS. 4 to 5). Here, since the holding metal fitting 13 has an L-shape when viewed from the front, the holding metal fitting 13 is naturally inclined by the pressing operation of the operator.

(3) Temporary fastening state of the terminal screw 11 The temporary fastening state of the terminal screw 11 is a state in which the tip of the terminal screw 11 is at a temporary fastening position Bk set near the upper surface of the connection conductor 12, as shown in FIG. . At the temporary fixing position Bk of the terminal screw 11, the projection 13p of the holding metal fitting 13 biased upward by the coil spring 14 is engaged with the locking convex portion PV at the locking position Q (FIG. 5). That is, as the holding metal fitting 13 shifts from the upright posture Wr (FIG. 6) to the inclined posture Bk as the operator pushes the terminal screw 11, the protrusion 13p of the holding metal 13 protrudes from the guide groove GV. It reaches the locking projection PV and stops at the locking position Q (FIG. 5).

(4) State before starting screwing of terminal screw 11 The state before starting screwing of terminal screw 11 is a state where the tip of terminal screw 11 is just above the inlet IN of screw hole 12h of connecting conductor 12, as shown in FIG. It is in the preparation position Bp and is in a state immediately before the start of screwing of the terminal screw 11 by the operator. As the operator moves the terminal screw 11 from the temporary fixing position Bk (FIG. 8) to the screwing preparation position Bp, the holding bracket 13 is upright from the inclined posture Wt (FIG. 8) of the temporary fixing position Bk. By returning to the posture Wr, the projection 13p of the holding metal 13 returns from the locking position Q (FIG. 5) to the guide groove GV. Here, since the inlet IN of the screw hole 13h of the connection fitting 13 is chamfered, the tip of the terminal screw 11 can be easily guided to the inlet of the screw hole 13h.

(5) Screwed state of the terminal screw 11 The screwed state of the terminal screw 11 is a state in which the terminal screw 11 is screwed into the screw hole 12h of the connecting conductor 12, as shown in FIG. That is, the terminal screw 11 is screwed into the screw hole 12h of the connecting conductor 12 by the operator pushing down the terminal screw 11 at the screwing preparation position Bp shown in FIG. Although not shown in FIG. 10, a crimp terminal or the like is fixed when the terminal screw 11 is screwed.

(6) Unscrewing state of the terminal screw 11 The unscrewing state of the terminal screw 11 is a state where the screwing of the terminal screw 11 with respect to the screw hole 12h of the connecting conductor 12 is released as shown in FIG. That is, the terminal screw 11 is removed from the screw hole 12h of the connecting conductor 12 by rotating the screwed terminal screw 11 shown in FIG. Since the projection 13p of the holding metal fitting 13 is fitted in the guide groove GV in the unscrewed state of the terminal screw 11, the holding metal fitting 13 is applied with an urging force for moving the terminal screw 11 toward the top position Bt along the Y-axis direction. The holding spring 13 moves upward along the guide groove GV and the terminal screw 11 automatically returns to the top position Bt (FIG. 6). In this case, when the terminal screw 11 is loosened, the terminal screw 11 tries to return to the temporary fixing position Bk (FIG. 8) by the L-shaped action of the holding fitting 13 and the urging force of the coil spring 14, but the guide groove When the protrusion 13p of the holding metal fitting 13 hits the side wall of the GV, the terminal screw 11 returns to the top position Bt without returning to the temporary fixing position Bk. Since the screw hole 12h is threaded along the Y-axis direction, the terminal screw 11 is easily returned to the top position Bt along the Y-axis direction when the screwing is released.

  In the terminal block 1 described above, the terminal screw 11 can be temporarily fixed by engaging the projection 13p of the holding metal fitting 13 biased upward by the coil spring 14 with the locking projection PV. When the terminal screw 11 is moved from the temporary fixing position Bk (FIG. 8) to the screwing preparation position Bp (FIG. 9) on the screw hole 12h, the guide groove GV in which the protrusion 13p of the holding metal 13 extends in the vertical direction. Therefore, when the screw of the terminal screw 11 with respect to the screw hole 12h is released and removed, the terminal screw 11 can return to the top position Bt (FIG. 6) by the urging force of the coil spring 14 without moving to the temporary fixing position Bk. .

  Further, in the conventional terminal block (for example, FIG. 3 of the above-mentioned Patent Document 1), there has been a problem that the terminal screw is lowered from the top position to the temporary fixing position due to vibration during transportation or the like. Such a problem does not occur in the terminal block 1.

  Further, in the terminal screw 11 of the present embodiment, the terminal screw 11 at the top position Bt can be directly moved to the screw hole 12h without being temporarily fixed and tightened. That is, from the top position Bt (FIG. 6), a temporary fixing operation (first operation) for moving the terminal screw 11 to the temporary fixing position Bk (FIG. 8), and the terminal screw 11 is screwed along the Y-axis direction. It is possible to select a transfer operation (second operation) that moves linearly to the inlet IN of 12h. Thereby, convenience will be improved as compared with the conventional terminal block.

  In addition, you may make it apply the structure of the terminal block 1 mentioned above to the switch demonstrated below.

  FIG. 12 is a perspective view showing a main configuration of the switch 2 to which the configuration of the terminal block 1 is applied. FIG. 13 is a longitudinal sectional view for explaining the internal structure of the switch 2.

  The switch 2 includes a switch body 20 and a terminal portion 3 that functions as a terminal device.

  The terminal portion 3 includes a terminal screw 31, a holding bracket 33, and a coil spring 34 having the same configuration as the terminal screw 11, the holding bracket 13, and the coil spring 14 of the terminal block 1 described above. A guide groove (not shown) corresponding to the above-described guide groove GV (FIG. 4) of the terminal block 1 is formed on the wall portion 30 of the terminal portion 3, and the locking protrusion PV of the terminal block 1 is formed. The latching convex part PW corresponding to is provided.

  Moreover, the terminal part 3 is provided with two conductors 32 (32a, 32b) which divided | segmented the connection conductor 12 of the terminal block 1 mentioned above in the center. Each of the conductors 32a and 32b is provided with a screw hole 32h corresponding to the screw hole 12h of the terminal block 1 and a contact point Ca.

  The switch body 20 is configured as a pushbutton switch, and includes a conductor 21 that moves in the pressing direction Dp when the switch is pressed. The conductor 21 is provided with two contact points Cb corresponding to the contact points Ca of the conductors 32 of the terminal portion 3. Therefore, when the switch is pressed by the switch body 20, the contact Cb of the conductor 21 contacts the contact Ca of the conductor 32, so that the conductor 32a and the conductor 32b can be electrically connected.

  Since the terminal portion 3 of the switch 2 described above has a configuration corresponding to the terminal block 1 described above, the terminal screw 31 can be temporarily fixed, and when the screwing of the terminal screw 31 is released, the top position is reached. It will be possible to return to.

It is a perspective view which shows the principal part structure of the terminal block 1 which concerns on embodiment of this invention. 2 is a front view showing a configuration of a main part of the terminal block 1. FIG. It is a perspective view which shows the structure of the relay terminal block 100 in which many terminal blocks 1 were arranged. It is a figure for demonstrating the structure of 13R of holding metal fittings. FIG. 3 is a diagram for explaining a configuration of a main body unit 10. FIG. 5 is a diagram for explaining the operation of the terminal block 1. FIG. 5 is a diagram for explaining the operation of the terminal block 1. FIG. 5 is a diagram for explaining the operation of the terminal block 1. FIG. 5 is a diagram for explaining the operation of the terminal block 1. FIG. 5 is a diagram for explaining the operation of the terminal block 1. FIG. 5 is a diagram for explaining the operation of the terminal block 1. It is a perspective view which shows the principal part structure of the switch 2 to which the structure of the terminal block 1 is applied. 2 is a longitudinal sectional view of a switch 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal block 2 Switch 3 Terminal part 10 Main part 11, 31 Terminal screw 12 Connection conductor 12h, 32h Screw hole 13, 33 Holding metal fitting 14, 34 Coil spring 32 Conductor Bk Temporary fixing position Bp Screwing preparation position Bt Top position GV Guide groove PV, PW Locking projection Q Locking position SL Slope Wr Erect posture Wt Inclined posture

Claims (6)

A terminal device,
(a) a terminal screw;
(b) a conductive portion having electrical conductivity and having a screw hole that can be screwed into the terminal screw;
(c) a holding member having a predetermined protrusion and holding the terminal screw rotatably;
(d) a wall portion having a wall surface in which a guide groove for guiding the predetermined protrusion is formed along a predetermined direction;
(e) an urging means for applying an urging force to the holding member for moving the terminal screw toward the top position along the predetermined direction;
With
The predetermined protrusion comes out of the guide groove by the holding member shifting from an upright posture to an inclined posture in accordance with a pressing operation of pushing down the terminal screw against the biasing force from the top position. It is possible to move to a locking position locked to a predetermined locking part,
When the holding member returns from the inclined posture to the upright posture in accordance with the operation of moving the tip of the terminal screw from the temporary fixing position of the terminal screw corresponding to the locking position to the inlet of the screw hole. The terminal device is characterized in that the predetermined protrusion returns from the locking position to the guide groove. The terminal device according to claim 1,
A locking projection that engages with the predetermined protrusion is provided on the wall surface as the predetermined locking portion,
The terminal device according to claim 1, wherein, by the pressing operation, the predetermined protrusion reaches a locking convex portion along a predetermined slope from the guide groove. The terminal device according to claim 1 or 2,
A terminal device, wherein a predetermined chamfer is provided at an inlet of the screw hole. The terminal device according to any one of claims 1 to 3,
The terminal device, wherein the screw hole is threaded along the predetermined direction. The terminal device according to any one of claims 1 to 4,
The terminal device according to claim 1, wherein the holding member has a cross section having an L shape with respect to a cross section parallel to the wall surface. The terminal device according to any one of claims 1 to 5,
From the top position, a first operation for moving the terminal screw to the temporary fixing position, and a second operation for linearly moving the terminal screw to the inlet of the screw hole along the predetermined direction. A terminal device that can be selected.

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