JP2010244787A - Terminal block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal block capable of structuring at low cost and also capable of enhancing an assembling property. <P>SOLUTION: A screw body 11 and a terminal 12 are built in a terminal block body 14. The screw body 11 retains a plate spring 22 in free rotation between a head part 25 and a screw axis part 26 of a screw 21. A pair of spring piece parts 31 projecting toward a side of the screw 21 are fitted at the plate spring 22. On the terminal block body 14, a screw body support part 60 for movably supporting the screw body 11 along an axis direction between a position with the screw 21 screwed to the terminal 12 and a position with the screw come off and separated. A pair of groove parts 62 for engaging with the pair of the spring piece parts 31 are fitted on both sides of the screw support part 60. As the pair of spring piece parts 31 comes in contact with separation guide parts 64 of the pair of groove parts 62 in elastic deformation state, the screw body 11 is made to move upward separating from the terminal 12 by elastic restoring force of the spring piece parts 31. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a terminal block having an auto-up function in which a screw unscrewed from a terminal automatically moves away from the terminal.

  2. Description of the Related Art Conventionally, in a terminal block, a terminal is fixed to a terminal block body, and a screw with a washer that is screwed to the terminal is disposed so as to be movable in the axial direction. As for the screw with a washer, the washer is rotatably attached between the head portion of the screw and the screw shaft portion.

  For example, when connecting a round crimp terminal to the terminal block, with the washer screw removed from the terminal and separated, the round crimp terminal is placed between the washer screw and the terminal. The circular crimping terminal is pressed and connected to the terminal by arranging and inserting the screw with the washer through the round crimping terminal and screwing the screw into the terminal.

  In addition, in a terminal block with an auto-up function, a screw with a washer with a coil spring attached to an L-shaped projection provided on the washer is incorporated in the terminal block body, and the screw with the washer is screwed onto the terminal. When tightening, the coil spring is elastically deformed.On the other hand, when the screw with the washer that is closed on the terminal is loosened, if the screw with the washer is detached from the terminal, the screw with the washer is moved to the terminal by the elastic restoring force of the coil spring. It is automatically moved in a direction away from the terminal so that the round crimp terminal can be easily connected (see, for example, Patent Document 1).

JP 2005-209345 A (page 5-6, FIG. 1-6)

  However, since the conventional terminal block having an auto-up function uses a coil spring to move the screw with the washer that is unscrewed from the terminal in a direction away from the terminal, the L to which the coil spring is attached It is necessary to use a dedicated washer provided with a letter-shaped protrusion, and there is a problem that the cost becomes higher than when a general washer is used.

  Further, when a screw with a washer is incorporated into the terminal block body, there is a problem that the coil spring is easily detached from the L-shaped protrusion of the washer or the detached coil spring is likely to be scattered, resulting in poor assemblability.

  The present invention has been made in view of these points, and an object of the present invention is to provide a terminal block that can be constructed at low cost and can be improved in assemblability.

  The terminal block according to claim 1 includes a screw having a head portion and a screw shaft portion, a base portion rotatably mounted between the head portion of the screw and the screw shaft portion, and a side portion of the screw from the base portion. A screw body having a leaf spring having a spring piece projecting toward the terminal, a terminal having a screw hole portion into which the screw shaft portion of the screw is screwed, a terminal fixing portion for fixing the terminal, and fixing to the terminal fixing portion. A screw body support that supports the screw body so as to be movable along the axial direction from a position where the screw shaft portion of the screw is screwed into a screw hole portion of the terminal that has been screwed to a position where the screw is released and separated. And a spring piece portion of the leaf spring of the screw body arranged on the screw body support portion in an elastically deformed state, and the screw body is separated from the terminal by an elastic restoring force of the spring piece portion. A terminal block body having a separation guide portion to be moved It is those who are.

  The terminal block according to claim 2 is the terminal block according to claim 1, wherein a pair of spring pieces of the leaf spring protrudes from both sides of the base to both sides of the screw.

  The terminal block according to claim 3 is the terminal block according to claim 1 or 2, wherein the terminal block main body has a groove portion that engages with a spring piece portion of the spring along a side portion of the screw body support portion. In addition, a protruding portion that protrudes in a direction approaching the screw body support portion is provided at an intermediate portion of the groove portion, and a direction away from the screw body support portion is provided on the side away from the terminal from the protrusion portion. The separation guide portion that is inclined toward the terminal is provided, and a clearance portion that is inclined toward the direction away from the screw body support portion is provided on the side closer to the terminal than the protruding portion, and the screw of the screw body is When the terminal is tightened to the terminal, the spring piece portion is disposed at the relief portion, and when the screw tightened to the terminal is loosened, the spring piece portion comes into contact with the protruding portion and elastically deforms. And whether the screw is the terminal Immediately before coming off, the spring piece part comes into contact with the separation guide part in an elastically deformed state, and the screw moves away from the terminal by the elastic restoring force of the spring piece part when the screw comes off from the terminal. Is.

  The terminal block according to claim 4 is the terminal block according to claim 3, wherein a plurality of terminal portions for arranging the screw body and the terminal are arranged in parallel in the terminal block main body, and the terminal portions are arranged in parallel. The groove is arranged in a direction intersecting the direction.

  The terminal block according to claim 5 is the terminal block according to claim 3 or 4, wherein the spring piece portion of the leaf spring is directed from the base portion to a lateral region of the head portion of the screw in a state before elastic deformation. It protrudes diagonally.

  The terminal block according to claim 6 is the terminal block according to any one of claims 1 to 5, wherein the screw body can be inserted into the terminal block main body in a state where the front terminal is not fixed to the terminal fixing portion. An opening is formed, and a cover portion for restricting movement of the screw body in a direction away from the terminal is formed at a position where the tip of the screw shaft portion of the screw is separated from the terminal by a predetermined dimension. An operation hole for operating the head of the screw is formed.

  According to the terminal block of claim 1, in order to move the screw unscrewed from the terminal in a direction away from the terminal, the screw is rotatably mounted between the head portion of the screw and the screw shaft portion. Since the leaf spring is used, it can be constructed at a low cost and the assemblability can be improved without the leaf spring being detached or scattered from the screw when assembled to the terminal block body.

  According to the terminal block of the second aspect, in addition to the effect of the terminal block of the first aspect, the leaf spring projects a pair of spring pieces from both sides of the base portion. When the screw is moved away from the terminal and when the leaf spring is elastically deformed and screwed into the terminal, the screw can be moved in parallel along the axial direction.

  According to the terminal block according to claim 3, in addition to the effect of the terminal block according to claim 1 or 2, when the screw is fastened to the terminal, the spring piece portion is arranged in the relief portion, Since it is possible to prevent elastic deformation from occurring in the portion, the auto-up function of the screw by the leaf spring can be reliably maintained, and when the screw tightened to the terminal is loosened, the spring As the piece comes into contact with the protruding portion and elastically deforms, and the spring piece comes into contact with the separation guide portion in an elastically deformed state immediately before the screw is detached from the terminal, the spring piece is elastically restored by removing the screw from the terminal. The screw can be reliably moved in a direction away from the terminal by the force.

  According to the terminal block of the fourth aspect, in addition to the effect of the terminal block of the third aspect, even if the terminal block body is provided with a plurality of terminal portions for arranging the screw body and the terminal, the terminal blocks are arranged in parallel. Since the groove part is arrange | positioned in the direction which cross | intersects with an installation direction, it can prevent that a terminal block main body enlarges in the parallel arrangement direction of a terminal part.

  According to the terminal block of the fifth aspect, in addition to the effect of the terminal block of the third or fourth aspect, the spring piece portion is slanted from the base portion to the lateral region of the screw head in a state before elastic deformation. Therefore, the spring piece part can be easily elastically deformed by contact with the projecting part, and the screw can be reliably moved in a direction away from the terminal by the contact with the separation guide part.

  According to the terminal block of the sixth aspect, in addition to the effect of the terminal block according to any one of the first to fifth aspects, the screw body is connected to the screw body support portion from the opening provided in the terminal fixing portion of the terminal block body. Since it can be inserted, the screw body and terminal can be easily assembled from one direction with respect to the terminal block body, and the terminal block body can be formed with a cover that restricts the movement of the screw body in the direction away from the terminal. Therefore, it is not necessary to use a cover part separately, and the number of parts can be reduced.

1 shows an embodiment of a terminal block according to the present invention, where (a) is a cross-sectional view taken along line AA in FIG. 2, (b) is a cross-sectional view taken along line BB in FIG. 2, and (c) is a cross-sectional view taken along line C-- in FIG. It is C sectional view. It is sectional drawing of a terminal block same as the above. It is a perspective view of the terminal block main body, screw body, and terminal of a terminal block same as the above. It is the perspective view seen from the bottom face side of the assembly state of a terminal block same as the above. It is a perspective view of the decomposition | disassembly state of a screw body same as the above.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 4, there are a plurality of terminal blocks, for example, three screw bodies 11 and terminals 12, and terminals in which three terminal portions 13 into which these screw bodies 11 and terminals 12 are respectively incorporated are arranged in parallel. A stand body 14 is provided. One surface of the terminal block main body 14 is a mounting surface 15 for mounting the terminal block to a mounting portion such as a substrate.Hereafter, the mounting surface 15 side is the lower side, the opposite side to the mounting surface 15 is the upper side, and the terminal portion 13 is aligned. The side crossing the installation direction will be described as left and right.

  As shown in FIG. 5, the screw body 11 includes a screw 21, a leaf spring 22, and a washer 23.

  The screw 21 includes a head 25 to be engaged with a screwdriver (not shown), a screw shaft portion 26 formed with a male screw, and a neck portion 27 formed between the head 25 and the screw shaft portion 26. Yes. After the leaf spring 22 and the washer 23 are placed on the neck 27 through the cylindrical shaft before the male screw of the screw shaft portion 26 is formed, the stopper 28 is formed on the cylindrical shaft to hold the leaf spring 22 and the washer 23 in a pivotable manner. In addition, a male screw is formed.

  The leaf spring 22 is integrally formed of a metal plate material having spring properties, and includes a substantially rectangular base portion 30 and a pair of spring piece portions 31 projecting from the opposite sides of the base portion 30. ing. The base portion 30 is formed with a hole portion 32 that is rotatably fitted to the neck portion 27 of the screw 21, and a stopper portion 33 is erected at at least one end portion of the left and right side portions. The pair of spring piece portions 31 project obliquely toward both side regions of the head 25 of the screw 21 so as to form a substantially inverted C shape from the center portion of the left and right side portions before being elastically deformed. Has been. A contact portion 34 that is bent in a substantially L shape on the inner surface side (upper surface side) is formed on the distal end side of each spring piece portion 31, and between the contact portion 34 and the base portion 30 of each spring piece portion 31. A curved portion 35 having a concave curved surface on the outer surface side (lower surface side) is formed.

  The washer 23 is formed of a metal material in a substantially square shape, and a hole portion 37 is formed in the center so as to be rotatably fitted to the neck portion 27 of the screw 21. The four corners of the washer 23 and the central part of each of the four sides are formed so as to protrude toward the lower surface.

  Further, as shown in FIGS. 1 to 3, the terminal 12 is integrally formed of a conductive metal material, and is bent downward from the connection plate portion 41 and the opposite left and right sides of the connection plate portion 41. And a terminal piece 43 projecting downward from one of the mounting plate portions 42. The connection plate portion 41 is formed with a screw hole portion 44 into which the screw shaft portion 26 of the screw 21 is screwed.

  As shown in FIGS. 1 to 4, the terminal block main body 14 is integrally formed in a rectangular box shape in which the three terminal portions 13 are arranged with an insulating synthetic resin material.

  Each terminal portion 13 is partitioned by a partition plate portion 51, and a space portion 52 is formed in each terminal portion 13 along the vertical direction, and the lower surface of the space portion 52 is formed on the lower surface of the terminal base body 14. An opening 53 is formed, a cover 54 is formed on the upper surface of the space 52, and wiring openings 55 that are open to communicate with the space 52 are formed on the left and right sides of the space 52.

  Terminal fixing portions 57 for fixing the terminals 12 are formed on the left and right inner edge portions of the opening 53. These terminal fixing portions 57 are formed with fixing grooves 58 in which both side edges of the mounting plate portion 42 of the terminal 12 are press-fitted and fixed to prevent them from coming off. In the terminal 12 fixed to the terminal fixing portion 57, the upper surface of the connection plate portion 41 is substantially the same as the lower edge portion of the wiring port 55. The screw body 11 can be inserted through the opening 53 between the terminal fixing portions 57 in a state where the terminal 12 is not fixed.

  In the space portion 52, a screw body support portion 60 that houses and supports the screw body 11 so as to be movable in the vertical direction along the axial direction is formed. The screw body support portion 60 is formed in a quadrangular cross section that is movable in the vertical direction in a fitted state in which the base 30 and the washer 23 of the quadrangular leaf spring 22 are prevented from rotating.

  A pair of groove portions 62 that engage with the pair of spring pieces 31 of the leaf spring 22 are formed in the center of the left and right side surfaces of the screw body support portion 60 along the vertical direction. A projecting portion 63 projecting in a direction approaching the center of the screw body support portion 60 is formed at the intermediate portion in the vertical direction of these groove portions 62, and is separated from the center of the screw body support portion 60 above the projecting portion 63. A separation guide portion 64 that is expanded and inclined in the direction to be formed is formed, and a relief portion 65 that is expanded and inclined in a direction away from the center of the screw body support portion 60 is formed below the protrusion 63. Yes. The protruding portion 63, the separation guide portion 64, the escape portion 65, and the screw body 11 are the spring piece portion 31 when the screw 21 of the screw body 11 is fastened to the terminal 12, as shown in FIG. 1 is disposed in the relief portion 65, and when the screw 21 tightened in the terminal 12 is loosened, the spring piece portion 31 comes into contact with the protruding portion 63 and elastically deforms, and as shown in FIG. Immediately before 21 is detached from the terminal 12, the spring piece 31 comes into contact with the separation guide portion 64 in an elastically deformed state, and the spring 21 is removed from the terminal 12 as shown in FIG. The screw 21 has a relationship of moving upward away from the terminal 12 by force.

  The cover portion 54 is formed with an operation hole 67 for inserting a screwdriver to rotate the head 25 of the screw 21. The upper ends of the groove portions 62 are open to the left and right sides of the operation hole 67. Has been. On the lower surface of the edge portion of the operation hole 67, a restricting portion 68 is formed that the stopper portion 33 of the leaf spring 22 abuts and restricts the upward movement of the screw body 11. The position where the stopper portion 33 of the leaf spring 22 is in contact with the restricting portion 68 is a position where the tip of the screw shaft portion 26 of the screw 21 is separated from the terminal 12 by a predetermined dimension and moved above the wiring port 55. It is.

  The wiring port 55 is open to the left and right sides of the lower portion of the screw body support portion 60.

  Next, the operation of the terminal block will be described.

  First, in order to assemble the terminal block, as shown in FIG. 3, the screw shaft portion 26 of the screw 21 of the screw body 11 is screwed into the screw hole portion 44 of the terminal 12 and is integrally assembled. It is inserted from the opening 53 of the terminal portion 13 of the base body 14 and disposed at the lower portion of the screw body support portion 60, and both side edges of the left and right mounting plate portions 42 of the terminal 12 are fixed to the fixing grooves 58 of the terminal fixing portion 57. The terminal 12 is press-fitted to a predetermined fixing position and fixed.

  In the assembled state of the terminal block, the terminal piece 43 of each terminal 12 arranged on each terminal portion 13 protrudes from the lower surface of the terminal block main body 14 and uses these terminal piece portions 43 to connect to a mounting portion such as a substrate. To do.

  As shown in the terminal portion 13 on the left side of FIG. 1A and FIG. 2, when the screw 21 of the screw body 11 is fastened to the terminal 12, the pair of spring pieces 31 escapes the pair of grooves 62. It is arranged in the portion 65, and the pair of spring piece portions 31 are not under a load that does not cause elastic deformation. Therefore, the spring property of the pair of spring pieces 31 is not impaired, and a desired elastic restoring force can be exhibited by a predetermined amount of elastic deformation.

  By inserting a screwdriver tool through the operation hole 67 of the cover portion 54 and engaging the head portion 25 of the screw 21 and rotating the screw 21 tightened on the terminal 12 in the loosening direction, the screw 21 is moved to the terminal. 12 and the pair of spring pieces 31 together with the screw 21 move upward in the pair of grooves 62, and the contact portion 34 contacts the protruding portion 63, thereby the screw body support portion 60. The pair of spring pieces 31 are elastically deformed so as to approach each other.

  As shown in the terminal portion 13 in the center of FIG. 1B and FIG. 2, immediately before the screw 21 is detached from the terminal 12, the pair of spring pieces 31 are in an elastically deformed state and the contact portion 34 becomes the separation guide portion 64. The screws 21 come into contact with each other and are biased so that the screw 21 moves upward by the elastic restoring force of the pair of spring pieces 31. At this time, since a curved portion 35 having a concave curved surface on the outer surface side (lower surface side) is formed between the contact portion 34 and the base portion 30 of each spring piece portion 31, the outer surface of each spring piece portion 31 is The screw 21 can be reliably urged to move upward by the elastic restoring force of the pair of spring pieces 31 without coming into contact with the protrusion 63.

  As shown in the terminal portion 13 on the right side of FIG. 1C and FIG. 2, the pair of spring pieces 31 are separated from each other by the elastic restoring force of the pair of spring pieces 31 when the screw 21 is detached from the terminal 12. The surface of the part 64 is expanded while sliding, and the screw 21 is moved upward to hold the screw 21 and the terminal 12 in an open state.

  In order to connect, for example, a round crimp terminal to the terminal block, the round crimp terminal is inserted between the screw 21 and the terminal 12 through the wiring port 55, and the screw 21 is connected to the pair of spring pieces 31 with a screwdriver. Pushing and moving downward against the biasing force, the screw shaft portion 26 of the screw 21 is inserted into the round crimp terminal and screwed into the terminal 12 and tightened.

  As the screw 21 is tightened into the terminal 12, the pair of spring pieces 31 abut against the protrusion 63 and elastically deform, but the elastic deformation is released by moving through the protrusion 63 to the escape portion 65. It will be done.

  The screw 21 is tightened in a state where the round crimp terminal is sandwiched between the washer 23 and the terminal 12, and the round crimp terminal and the terminal 12 are electrically connected.

  In the terminal block configured as described above, the screw 21 unscrewed from the terminal 12 is rotated between the head portion 25 of the screw 21 and the screw shaft portion 26 in order to move the screw 21 upward away from the terminal 12. Since the leaf springs 22 that can be mounted are used, it can be constructed at a low cost, and the assembly performance can be improved because the leaf springs 22 do not come off or scatter from the screws 21 when assembled to the terminal block body 14.

  Further, since the leaf spring 22 protrudes the pair of spring pieces 31 from both sides of the base portion 30, when the screw 21 is moved away from the terminal 12 by the elastic restoring force of the leaf spring 22, the leaf spring 22 When the screw 21 is screwed onto the terminal 12 by elastically deforming the screw 21, the screw 21 can be moved in parallel along the axial direction.

  Further, in a state where the screw 21 is tightened to the terminal 12, the spring piece portion 31 can be disposed in the escape portion 65 so that the spring piece portion 31 is not elastically deformed. The auto-up function of the screw 21 by 22 can be reliably maintained. Further, when loosening the screw 21 tightened on the terminal 12, the spring piece 31 contacts the protrusion 63 and elastically deforms, and the spring piece 31 elastically deforms immediately before the screw 21 is detached from the terminal 12. Since the screw 21 comes out of contact with the terminal 12 in the state, the screw 21 can be reliably moved upward away from the terminal 12 by the elastic restoring force of the spring piece 31.

  Further, even if the terminal block body 14 is provided with a plurality of terminal portions 13 for disposing the screw bodies 11 and the terminals 12, respectively, the groove portions 62 are disposed in a direction intersecting the parallel arrangement direction of the terminal portions 13. Therefore, it is possible to prevent the terminal block body 14 from becoming large in the direction in which the terminal portions 13 are arranged side by side.

  Further, the leaf spring 22 protrudes obliquely from the base 30 toward the side region of the head 25 of the screw 21 in a state where the spring piece 31 is not elastically deformed. This makes it easy to elastically deform easily and allows the screw 21 to be reliably moved upward away from the terminal 12 by contact with the separation guide portion 64.

  In addition, since the screw body 11 can be inserted into the screw body support portion 60 from the opening 53 provided in the terminal fixing portion 57 of the terminal block body 14, the screw body 11 and the terminal 12 can be easily inserted into the terminal block body 14 from one direction. The terminal block body 14 can be formed with a cover portion 54 that restricts the movement of the screw body 11 in the direction away from the terminal 12, eliminating the need for a separate cover portion 54 and reducing the number of parts. it can.

  The terminal block is not limited to the configuration in which the three terminal portions 13 are arranged in parallel, and may have a configuration in which a plurality of terminal portions 13 other than three are arranged in parallel or a configuration in which only one terminal portion 13 is provided.

  Further, the terminal block main body 14 is provided with the protruding portion 63 and the escape portion 65 together with the separation guide portion 64 in the groove portion 62.For example, the lower portion of the terminal block main body 14 is located at the same position as the protruding portion 63. The separation guide portion 64 that is continuously inclined from the upper end to the lower end of the groove portion 62 may be omitted, and the protrusion 63 and the escape portion 65 may be omitted, and at least the separation guide portion 64 only needs to be provided.

  Further, by using the washer 23, it is possible to securely hold the wiring between the terminal 12 and prevent loosening, but the washer 23 may be omitted.

11 Screw body
12 terminals
13 Terminal
14 Terminal block
21 Screw
22 leaf spring
25 heads
26 Screw shaft
30 base
31 Spring piece
44 Screw hole
53 opening
54 Cover
57 Terminal fixing part
60 Screw support
62 Groove
63 Protrusion
64 Separation guide
65 escape
67 Operation hole

Claims (6)

A plate having a head having a head and a screw shaft, a base portion rotatably mounted between the head of the screw and the screw shaft, and a spring piece protruding from the base to the side of the screw A screw body with a spring;
A terminal having a screw hole portion into which the screw shaft portion of the screw is screwed,
The terminal fixing portion for fixing the terminal, and the screw from the position where the screw shaft portion of the screw is screwed into the screw hole portion of the terminal fixed to the terminal fixing portion to the position where the screw is released and separated. A screw body support portion that supports the body movably along the axial direction, and a spring piece portion of the leaf spring of the screw body arranged on the screw body support portion comes into contact with each other in an elastically deformed state. A terminal block comprising: a terminal block main body including a separation guide portion that moves the screw body in a direction away from the terminal by an elastic restoring force. The terminal block according to claim 1, wherein a pair of spring pieces of the leaf spring protrudes from both sides of the base to both sides of the screw. The terminal block main body has a groove portion that engages with a spring piece portion of the spring along a side portion of the screw body support portion, and an intermediate portion of the groove portion approaches the screw body support portion. A protruding protrusion is provided, and on the side away from the terminal from the protruding portion, the separation guide portion that is inclined in a direction away from the screw body support portion is provided, and is closer to the terminal than the protrusion. A relief portion that is inclined toward the direction away from the screw body support portion is provided on the side, and the spring piece portion is disposed in the relief portion in a state where the screw of the screw body is fastened to the terminal. When the screw tightened to the terminal is loosened, the spring piece part comes into contact with the protruding part and elastically deforms, and the spring piece part is in an elastically deformed state immediately before the screw is detached from the terminal. To contact the separation guide And, the terminal block according to claim 1 or 2, wherein said screw and said screw by elastic restoring force of the spring piece portion by departing from the terminal is moved in a direction away from the terminal. The terminal block main body is provided with a plurality of terminal portions for arranging the screw body and the terminals, respectively, and the groove portions are arranged in a direction intersecting with the parallel arrangement direction of the terminal portions. The terminal block according to claim 3. 5. The terminal block according to claim 3, wherein the spring piece portion of the leaf spring projects obliquely from the base portion toward a lateral region of the head portion of the screw in a state before elastic deformation. . The terminal block body is formed with an opening through which the screw body can be inserted when the front terminal is not fixed to the terminal fixing portion, and the tip of the screw shaft portion of the screw is separated from the terminal by a predetermined dimension. The cover part which controls the movement of the said screw body in the direction away from the said terminal is formed in this, The operation hole which operates the head part of the said screw is formed in this cover part. The terminal block as described in any one of thru | or 5.

Images