terminal block

Abstract

The invention relates to a terminal having at least one spring force clamping connection for clamping an electrical conductor.

Description

Technical Field

[0001] This invention relates to a terminal block having at least one spring-force clamping connector for clamping electrical wires. Such a terminal block is known, for example, from DE 10 2013 111 574 B4. Background Technology

[0002] Terminal blocks can have the following additional features:

[0003] - At least one housing, wherein at least primarily spring-loaded clamping connectors are provided.

[0004] - Spring-force clamping connectors can have a contact frame and a clamping spring clamped in the contact frame.

[0005] - The contact frame can have a contact section, and the clamping spring is fixed to the contact section by a contact leg.

[0006] - The contact frame can have a clamping section, with a clamping spring preloaded relative to the clamping section via clamping legs, wherein a clamping portion for clamping the electrical wire is formed between the clamping legs and the clamping section.

[0007] - The contact frame may have at least one connecting section through which the abutting section and the clamping section are connected.

[0008] - The terminal block can have an actuating press associated with a spring-force clamping connector, the actuating press being movably accommodated in a press opening in the housing, wherein the actuating press has an actuating surface for abutting against a clamping leg and for moving the clamping leg toward the abutting leg so as to open the clamping portion when the actuating press moves in the press opening. Summary of the Invention

[0009] The present invention aims to further improve this terminal block for the following purposes.

[0010] The objective is achieved by a terminal block of the type mentioned at the beginning, which has one or more of the following characteristics a) to f):

[0011] a) The connecting section has a retaining notch, and the retaining protrusion of the housing engages with the retaining notch.

[0012] b) The contact frame, especially the connecting section, has a stop that restricts the operating path of the operating pressing element when the clamping part is opened.

[0013] c) The conductor stop or conductor receiving bag is molded in one piece onto the contact frame.

[0014] d) A dome, which extends into the spring bow of the clamping spring, is molded in one piece on the contact frame, particularly the connecting section, and restricts the deflection of the clamping spring by means of the dome.

[0015] e) The housing has a wire introduction channel, wherein the clamping section is recessed within the housing relative to at least one wall of the wire introduction channel.

[0016] f) The operating press has a protruding guide section that spans the edge of the clamping leg of the clamping spring, thereby guiding the operating press along the clamping leg.

[0017] This invention offers numerous advantages, such as simplified installation of the spring-loaded clamping connector within the housing, and particularly, the elimination of the need for separate fixing elements for a more secure hold. This prevents the spring-loaded clamping connector from slipping out of the housing. The retaining protrusion of the housing can be integrally formed with a portion of the housing, such as a sidewall. The spring-loaded clamping connector can be locked to the housing in such a way that the retaining protrusion locks into a retaining notch.

[0018] Overloading of the clamping spring and other components of the terminal block is prevented by a stop mechanism. In this way, the user of the terminal block can easily identify when the clamping spring is fully deflected through tactile feedback.

[0019] Another advantage is the integrated structural type of the contact frame, which can be highly functional and, for example, configured as a sheet metal component. Reliable limitation of the wire insertion depth is achieved through a one-piece molded wire stop or wire-receiving pouch, eliminating the need for separate components. The user can easily sense by touch when the wire is sufficiently long inserted into the housing.

[0020] Additional protection for the clamping springs can be achieved by using a mandrel molded in one piece onto the contact frame. The mandrel limits the deflection of the clamping springs, thus also preventing overload.

[0021] The use of the terminal block is further simplified and designed for greater user comfort by incorporating a clamping section that is recessed relative to the wire entry channel. This is especially beneficial in preventing the wire from getting stuck when inserting it into the wire entry channel. In this way, a typical wire guide is formed by the wire entry channel and the adjacent clamping section, at which the wire is guided to the clamping position.

[0022] The operation of the terminal block is further improved by the prominent guide section, which in particular reliably avoids misalignment between the operating press and the clamping leg.

[0023] The actuating press can be guided linearly and / or flexibly within the housing of the terminal block, for example. A stop on the contact frame or connecting section can extend obliquely relative to the direction of movement of the actuating press when it is actuated, for example, configured as an oblique edge relative to that direction of movement. In an advantageous design, the actuating press can have an edge opposite to the stop, the edge extending obliquely in a manner similar to the stop. In this way, a stop that initially acts relatively gently can be achieved, wherein as the actuating press continues to move, the oblique edges slide along each other, thus providing the user with tactile feedback about the final position the actuating press will soon reach. The oblique edge on the actuating press can, for example, be formed on a protruding guide section of the actuating press.

[0024] According to an advantageous design of the invention, the conductor stop or conductor receiving pouch is configured as a connecting plate that is bent multiple times from the connecting section. In this way, without additional costs, the conductor receiving pouch or conductor stop can be formed in the same production step as the contact frame is formed from the plate, thus achieving particularly safe reception of electrical conductors.

[0025] According to an advantageous design of the invention, the free end of the repeatedly bent connecting plate points towards the clamping leg. In this way, the free end of the conductor is secured to a predetermined area of ​​the terminal block by the connecting plate. The free end of the connecting plate can, for example, extend inclined to the direction of conductor introduction or the longitudinal axis of the conductor introduction channel, thereby additionally guiding the conductor.

[0026] The direction of movement of the manipulating pressing element can extend parallel to the direction of wire introduction or parallel to the longitudinal axis of the wire introduction channel.

[0027] According to an advantageous design of the invention, at least one connecting pin of the terminal block extending from the housing is integrally molded onto the contact frame. This has the advantage that the terminal block can be easily connected to other electrical or electronic structural units, for example, by fixing the terminal block to a circuit board and making electrical contact.

[0028] According to an advantageous design of the invention, the housing has at least one elongated mounting slot for mounting a contact frame with connecting pins extending from the housing. This allows for further simple mounting of the contact frame within the housing even in the case of terminals with one or more connecting pins.

[0029] According to an advantageous design of the invention, the clamping spring's abutment leg is fixed to the abutment section by a rivetless self-piercing riveting method. In this way, the abutment leg can be reliably fixed to the abutment section with low production costs. Alternatively or additionally, the abutment leg can also be coupled to the abutment section by a form-fit connection.

[0030] The clamping section can form a busbar of a type of spring-force clamping connector. According to an advantageous design of the invention, the clamping section has one or more raised portions for clamping electrical conductors, said raised portions being arranged sequentially and spaced apart from each other in the conductor introduction direction. This ensures reliable clamping and electrical contact of the electrical conductors. The multiple raised portions ensure good clamping, especially when the conductor cross-sections vary greatly.

[0031] According to an advantageous design according to the invention, the contact frame has a U-shaped profile. In this way, the contact frame can form a reliable receiving portion for clamping the spring with a simple shape. The abutment section can extend substantially perpendicular to the connecting section, for example. The clamping section can extend substantially perpendicular to the connecting section. The abutment section and the clamping section can extend parallel to each other, for example. The planes of the abutment section, the connecting section, and the clamping section are oriented primarily parallel to the direction of wire introduction.

[0032] According to an advantageous design of the invention, at least one pressing member opening is open toward an associated wire introduction channel, and an actuating pressing member movably supported in this pressing member opening forms part of the wall of the wire introduction channel by a section extending from the head end of the actuating pressing member to the lower end of the actuating pressing member having an actuating surface and extending into the wire introduction channel. In this way, the actuating pressing member can be housed in the housing with particularly space-saving considerations. Overall, in this way, with a compact terminal block construction, the actuating pressing member can be stably supported in the housing with improved force flow.

[0033] According to an advantageous design of the invention, the pressing opening widens from the inlet section adjacent to the wire introduction channel toward the side of the pressing opening opposite to the wire introduction channel, and wherein the cross-section of the actuating pressing member matches the widened profile of the pressing opening. This allows the actuating pressing member to be reliably supported in the housing. In particular, it prevents the actuating pressing member from sliding out of the housing.

[0034] According to an advantageous design of the invention, the actuating press has a recess on its actuating surface opposite to a portion of the wall forming the wire introduction channel, the recess for accommodating a section of the clamping spring, particularly a clamping leg. Thus, the clamping leg and, if necessary, a portion of the spring bow are introduced into this recess, which improves the support of the actuating press and improves guidance at the clamping leg of the clamping spring while reducing the force load acting on the adjacent housing.

[0035] According to an advantageous design of the invention, the recess is limited on one or both sides by a limiting wall of the actuating press. This allows for further improvement in the guidance between the actuating press and the clamping spring. The limiting wall can be implemented, for example, by the protruding guide section of the actuating press mentioned earlier.

[0036] According to an advantageous design of the invention, the operating press tapers taperingly from its externally accessible head end toward an operating surface that abuts against the clamping legs within the inner cavity of the housing. This provides sufficient surface at the head end to press the operating press downwards with reduced space requirements. The tapered taper optimally matches the available space above the clamping legs, which extend obliquely to the operating direction and the wire insertion direction, ensuring optimal actuation kinematics with minimal space constraints.

[0037] According to an advantageous design of the invention, the free end of the actuating press, disposed adjacent to the clamping portion within the cavity of the housing, has a protruding portion that partially forms a wire introduction channel and guides the electrical wire to the clamping portion. This protruding portion together constitutes a wire introduction funnel and, additionally, particularly in conjunction with an optional recess for accommodating the clamping leg, provides sufficient reinforcement in the actuating area acting on the clamping leg. This reduces the risk of bending of the actuating press.

[0038] According to an advantageous design of the invention, the free end of the actuating press member, accessible to the outside of the housing, has an actuating recess. This allows for improved actuation of the actuating press member, for example, by means of a screwdriver or another actuating tool. The actuating recess can be configured, for example, as a single-slit or cross-shaped slit.

[0039] For the purposes of this invention, the indefinite article “a” should not be understood as a numeral. That is, for example, if a component is mentioned, then it should be interpreted as “at least one component.” Regarding the description of angles in degrees, the description of angles refers to a circle of 360 degrees (360°). Attached Figure Description

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] The attached diagram shows:

[0042] Figure 1 , Figure 2 Different perspective views of a portion of the wiring terminals in the first embodiment are shown in the unoperated state of the actuating press.

[0043] Figure 3 , 4 This shows the state in which the pressing element is actuated, according to... Figure 1 , 2 The part, and

[0044] Figure 5 This diagram shows a cross-sectional view through a terminal block in the unoperated state of the actuating press, the terminal block having, according to... Figure 1 , 2 The part, and

[0045] Figure 6 This shows the state in which the pressing element is actuated, according to... Figure 5 The wiring terminals, and

[0046] Figure 7 A perspective view of a portion of the wiring terminals of the second embodiment is shown in the unoperated state of the operating press member, and

[0047] Figure 8 Showing according to Figure 7 A three-dimensional sectional view of the wiring terminals, and

[0048] Figure 9 In relative to Figure 8 The side sectional view in the changed section plane is shown according to Figure 8 The wiring terminals, and

[0049] Figure 10 The same sectional view shows the action of the actuating button being actuated according to... Figure 9 The wiring terminals, and

[0050] Figure 11 , 12 A different perspective view of a portion of the wiring terminals in the third embodiment is shown when the operating press is not operated.

[0051] The reference numerals used in the accompanying drawings have the following relationships:

[0052] 1. Terminal block

[0053] 2. Shell

[0054] 3. Contact frame of spring-force clamping connector

[0055] 4. Clamping springs for clamping connecting parts by spring force

[0056] 5. Operation pressing element

[0057] 20. Wire introduction opening

[0058] 21. Wire introduction channel

[0059] 22 Sidewalls

[0060] 23 Sidewalls

[0061] 24 Pressing opening

[0062] 25 Install narrow opening

[0063] 26. Maintain the bulge

[0064] 27. Guiding surface

[0065] 30 connecting pins

[0066] 31. Abutting section

[0067] 32 Connecting Section

[0068] 33 Clamping section

[0069] 34. Raised section

[0070] 35. Wire receiving bag

[0071] 36. Maintain the gap

[0072] 37. Top

[0073] 38 Stop components

[0074] 39. Edges at the contact frame

[0075] 41. Lean against the leg.

[0076] 42 Spring Bow

[0077] 43. Clasp your legs together.

[0078] 50 Manual control elements

[0079] 51 Manipulating the recess

[0080] 52 control surfaces

[0081] 53. Guiding Section

[0082] 54. Extended section

[0083] 55 recess

[0084] 56. Manipulate the edges on the pressing parts

[0085] 57 Guide Edge

[0086] L-direction of wire introduction Detailed Implementation

[0087] Figure 1 and Figure 2 The spring-loaded clamping connectors 3 and 4, as well as the actuating pressing member 5 of the terminal block, are shown. Therefore, the housing is not shown compared to a complete terminal block. This allows for a better illustration of the terminal block's internal structure.

[0088] In the accompanying drawings, the direction of wire introduction, L, is indicated by an arrow. The wire can be introduced into the spring-clamping connectors 3, 4, or the complete terminal block in this direction L, and guided to the clamping point where it can be clamped.

[0089] The spring-force clamping connectors 3 and 4 have a contact frame 3 made of a metal plate and a clamping spring 4 clamped in the contact frame 3. The contact frame 3 can be constructed as a single piece or composed of multiple components. A single-piece variant will be described below. However, other features of the contact frame, as set forth below, can also be implemented as individual components that can be coupled to the basic body of the contact frame 3 in a form-fitting, force-fitting, and / or material-fitting manner.

[0090] The contact frame 3 has a contact section 31, a connecting section 32, a clamping section 33, one or more connecting pins 30, a wire receiving pouch 35, a raised portion 34, a retaining notch 36, a stop 38, a top 37, and an edge 39. The connecting section 32 connects the contact section 31 and the clamping section 33. The top 37 is preferably formed as a single piece on the connecting section 32.

[0091] The clamping spring has a contact leg 41, a spring bow 42 connected to the contact leg 41, and a clamping leg 43 connected to the spring bow 42.

[0092] The operating press member 5 has a manual operating element 50, an operating surface 52, and a guide section 53.

[0093] The clamping spring 4 is abutted against the abutment section 31 by the abutment leg 41. The abutment leg 41 can be fixed to the abutment section 31 by means of a rivetless self-piercing riveting method. When no wire is clamped at the clamping section 33, the clamping leg 43 points towards or abuts against the clamping section 33. A clamping portion for clamping the wire is formed between the free end of the clamping leg 43 and the clamping section 33, for example at the protrusion 34. In this embodiment, the top head 37 is bent obliquely from the plane of the connecting section 32 toward the clamping spring 4 and extends into the spring bow 42 through its free end.

[0094] The wire receiving pouch 35 is molded in one piece onto the contact frame 3, for example, by bending the material connecting plate from the connecting section 32 in a manner of multiple bends into the shape shown. One or more connecting pins 30 can extend from the clamping section 33, which can also be molded in one piece onto the contact frame 3 or the clamping section 33.

[0095] The operating surface 52 is located in the area of ​​the clamping leg 43. If the operating press 5 is manually operated, for example on the manual operating element 50, the manual operation is transmitted to the clamping leg 43, and the clamping leg deflects such that its free end moves away from the clamping section 33. To simplify the manual operation of the operating element 50, especially by means of an operating tool, an operating recess 51 can be provided there.

[0096] As can be seen, the guide section 53 forming one type of sidewall of the operating element 5 protrudes slightly relative to the area with the recess 55. If the operating press 50 is deflected in the operating direction, i.e., pressed against the clamping spring 4, then a portion of the clamping spring 4, especially the area of ​​the clamping leg 43, and if necessary, the area of ​​the spring bow 42, can be accommodated in the recess 55. Here, the guide section 53 is formed as a lateral guide on the edge of the clamping leg 43.

[0097] The operating press 5 also has an edge 56 extending obliquely to the operating direction of the operating press 5, said edge being, for example, the edge of the guide segment 53. A similarly obliquely extending edge 39 at the contact frame 3 is associated with this obliquely extending edge 56. If the operating press 5 deflects downward in its operating direction, then the edge 56 of the operating press 5 contacts the edge 39 of the contact frame 3. The operating press 5 can slide along the edge 39 until it reaches the stop 38 at the contact frame 3. Further operation of the operating press 5 is restricted by the stop 38.

[0098] We can also see the retaining notch 36 in the contact frame 3, and its function will be discussed later.

[0099] Figure 3 and 4 This shows the state in which the pressing member 5 is operated according to... Figure 1 and 2 The components. It can be seen that the operating pressing member 5 is moved downwards toward the clamping spring 4. Similarly, the clamping leg 43 is moved downwards and particularly away from the clamping section 33 via the operating surface 52. In this state, the electrical wire can be inserted into or removed from the clamping part effortlessly. For example, especially... Figure 4 As explained, edges 39 and 56 abut against each other. In addition, the operating pressing member 5 also abuts against the stop member 38.

[0100] Figure 5 and Figure 6 The diagram shows the housing 2 of the terminal block 1 according to... Figures 1 to 4 The components described are as follows. It can be seen that the housing 2 has wire introduction openings 20. Each wire introduction opening 20 is connected to a wire introduction channel 21, which is defined by sidewalls 22 and 23, the sidewalls being formed of the material of the housing 2. The housing 2 can be constructed of an insulating material, making the housing 2 an insulating material housing.

[0101] The housing 2 has a molded retaining protrusion 26, which is positioned such that when the spring force clamps the connectors 3, 4 in the desired position in the housing 2, the retaining protrusion 26 engages in the retaining notch 36 in the form of a locking element.

[0102] It can also be seen that the housing 2 has an elongated mounting slot 25. The mounting slot 25 allows for easy installation of the spring-clamped connectors 3 and 4 in the housing 2, despite the presence of the connecting pin 30 protruding therefrom.

[0103] Regarding the operating press member 5, other features include a protruding segment 54 and guide edges 57 respectively provided on the left and right sides of the segment 54. The wire introduction channel 21 does not extend circumferentially to the clamping leg via the side walls 22 and 23, but terminates, for example, in the region of the side wall 23, in the region of the operating press member 5, for example, in the region of the protruding segment 54. Correspondingly, the wire introduction channel 21 opens toward the press member opening 24 in this region. The segment 54 extending into this wire introduction channel 21 forms part of the wall of the wire introduction channel; that is, the segment 54 also serves to guide the electrical wire to be connected.

[0104] The sidewall 22 may, for example, have a shoulder or undercut, behind which a clamping section 33 is provided slightly recessed. In this way, the electrical wire is also guided through the clamping section 33 attached to the sidewall 22 without getting stuck on the clamping section 33 upon insertion.

[0105] Figure 7 and Figure 8 An embodiment of a terminal block or component disposed therein is shown, having a different orientation of the connecting pin 30. In the previously described embodiment, the connecting pin 30 extends horizontally in the position shown at the terminal block, while... Figure 7 and 8In this embodiment, the connecting pin 30 extends at a 90-degree offset, that is, the connecting pin extends vertically downwards and protrudes from the housing 2 on the side opposite to the wire introduction opening 20. Furthermore, the components and the terminal block 1 correspond to the previously described embodiment. Here, due to the different positions of the connecting pin 30, the elongated mounting slot 25 in the housing 2 is not necessarily necessary.

[0106] Figure 9 and Figure 10 The following cross-section shows the... Figure 8 A cross-sectional view of the terminal block 1, the cross-section being located at the height of the guide edge 57 at the front of the operating press member 5. According to... Figure 9 and Figure 10 As can be seen, the manipulating pressing element 5 is additionally guided on the corresponding guide surface 27 of the housing 2 by the guide edge 57.

[0107] Figure 11 and Figure 12 One embodiment of the terminal block components is shown, wherein a top 37 extending into the spring bow 42 of the clamping spring 4 is additionally molded on the contact frame 3, for example, by stamping and bending a portion of the contact frame 3 accordingly on the connecting section 32. This thereby restricts the deflection of the clamping spring 4.

[0108] Unlike the embodiments described above, in this case, the operating pressing member 5 has protruding guide sections 53 as already described on both sides of the clamping leg 43. Therefore, the recesses 55 for receiving the clamping leg 43 are limited on both sides by the guide sections 53, which thus form sidewalls.

Claims

1. A terminal block (1) having at least one spring-force clamping connector for clamping electrical wires, wherein the terminal block (1) has at least one housing (2), the spring-force clamping connector being disposed primarily in the housing, wherein the spring-force clamping connector has a contact frame (3) and a clamping spring (4) clamped in the contact frame (3), wherein the contact frame (3) has an abutment section (31), the clamping spring (4) being fixed to the abutment section by abutment legs (41), and the contact frame (3) has a clamping section (33), the clamping spring (4) being pre-tensioned relative to the clamping section by means of the clamping legs (43), wherein the clamping spring (4) is pre-tensioned relative to the clamping section by means of the clamping legs (43) and the clamping section (33) A clamping portion for clamping electrical wires is formed between the contact frame (3), wherein the contact frame (3) has at least one connecting section (32), the abutting section (31) is connected to the clamping section (33) through the connecting section, wherein the terminal (1) has an operating press (5) associated with the spring force clamping connector, the operating press being movably received in a press opening (24) in the housing (2), wherein the operating press (5) has an operating surface (52) for abutting against the clamping leg (43) and for moving the clamping leg (43) toward the abutting leg (41) so as to open the clamping portion when the operating press (5) moves in the press opening (24). Its features are, The terminal block has one or more of the following characteristics a) to d): a) The contact frame (3) has a stop (38) that restricts the operating path of the operating press (5) when the clamping part is opened. b) A mandrel (37) extending into the spring bow (42) of the clamping spring (4) is molded in one piece onto the contact frame (3), by means of which the deflection of the clamping spring (4) is restricted. c) The housing (2) has a wire introduction channel (21), wherein the clamping section (33) is recessed within the housing (2) relative to at least one wall (22) of the wire introduction channel (21). d) The operating press (5) has a protruding guide section (53) that spans the edge of the clamping leg (43) of the clamping spring (4), thereby guiding the operating press (5) along the clamping leg (43), wherein the guide section (53) has an edge (56) that extends at an angle to the operating direction of the operating press (5), and the edge (56) of the guide section (53) can contact the edge (39) of the contact frame (3).

2. The terminal block according to claim 1, characterized in that, The conductor stop or conductor receiving bag (35) is molded in one piece onto the contact frame (3).

3. The terminal block according to claim 2, characterized in that, The conductor stop or the conductor receiving bag (35) is configured as a connecting plate that is bent multiple times from the connecting section (32).

4. The terminal block according to claim 3, characterized in that, The free end of the multiple-bend connecting plate points towards the clamping leg (43).

5. The terminal block according to any one of the preceding claims, characterized in that, At least one connecting pin (30) of the terminal block (1) extending from the housing (2) is molded in one piece onto the contact frame (3).

6. The terminal block according to claim 5, characterized in that, The housing (2) has at least one elongated mounting slot (25) for mounting a contact frame (3) having a connecting pin (30) extending from the housing (2).

7. The terminal block according to any one of claims 1 to 4, characterized in that, The clamping spring (4) has its abutting leg (41) fixed to the abutting section (31) by a rivetless self-piercing riveting method.

8. The terminal block according to any one of claims 1 to 4, characterized in that, The clamping section (33) has one or more raised portions (34) for clamping electrical wires, the raised portions being arranged sequentially along the wire insertion direction and spaced apart from each other.

9. The terminal block according to any one of claims 1 to 4, characterized in that, The contact frame (3) has a U-shaped profile.

10. The terminal block according to any one of claims 1 to 4, characterized in that, At least one of the presser openings (24) is open toward the associated wire introduction channel (21), and an operating press (5) movably supported in the presser opening (24) forms part of the wall of the wire introduction channel (21) by means of a section extending from the head end of the operating press (5) to the lower end of the operating press (5) having the operating surface (52) and extending into the wire introduction channel (21).

11. The terminal block according to any one of claims 1 to 4, characterized in that, The opening (24) of the pressing member is widened from the entrance section adjacent to the wire introduction channel (21) toward the side of the pressing member opening (24) opposite to the wire introduction channel (21), and the cross section of the operating pressing member (5) matches the widened profile of the pressing member opening (24).

12. The terminal block according to any one of claims 1 to 4, characterized in that, The operating press (5) has a recess on the operating surface (52) opposite to the surface of a portion of the wall forming the wire introduction channel (21), the recess being for accommodating a section of the clamping spring (4).

13. The terminal block according to any one of claims 1 to 4, characterized in that, The operating press (5) tapers tapering from its externally accessible head end toward the operating surface (52) that rests against the clamping leg (43) in the inner cavity of the housing (2) for moving the operating press (5).

14. The terminal block according to any one of claims 1 to 4, characterized in that, The free end of the operating pressing member (5), which is disposed adjacent to the clamping part in the inner cavity of the housing (2), has a protruding protrusion (54), which partially forms the wire introduction channel (21) and guides the wire to the clamping part.

15. The terminal block according to any one of claims 1 to 4, characterized in that, The free end of the operating press (5) that is accessible to the outside of the housing (2) has an operating recess (51).

16. The terminal block according to any one of claims 1 to 4, characterized in that, The connecting section (32) has a retaining notch (36), into which the retaining protrusion (26) of the housing (2) engages.

17. The terminal block according to any one of claims 1 to 4, characterized in that, The connecting section (32) of the contact frame (3) has a stop (38).

18. The terminal block according to any one of claims 1 to 4, characterized in that, The top (37) extending into the spring bow (42) of the clamping spring (4) is molded in one piece onto the connecting section (32) of the contact frame (3).

19. The terminal block according to claim 12, characterized in that, The recess is used to accommodate the clamping leg (43).

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