Plug piece, plug bush and socket

Abstract

The invention relates to the field of contact parts, in particular to a plug piece, a plug bush and a socket. The plug bush is used for solving the problem that it is difficult to ensure that the front end and the rear end of a plane contact section are reliably attached to an electric contact piece after an existing plug bush is used for a long time. The insertion pieces are symmetrically arranged in pairs and comprise root fixing piece body parts and U-shaped elastic arms, the space between the two U-shaped elastic arms of the insertion pieces in pairs is used for allowing an adaptive power contact piece to stretch in, and arm bodies, making contact with the adaptive power contact piece, of the U-shaped elastic arms are provided with plane contact sections. The plane contact section inclines towards the other arm body, so that the distance between the front ends of the plane contact sections of the two insertion pieces is smaller than the distance between the rear ends of the plane contact sections of the two insertion pieces, and the distance between the rear ends of the two insertion pieces is not larger than the thickness of an electric contact piece of an adaptive plug. During insertion, the front end of the U-shaped elastic arm swings outwards, and the outward swinging amplitude of the front ends of the two plane contact sections is larger than that of the rear ends of the two plane contact sections, so that the two plane contact sections are inserted into the electric contact piece in a mutually parallel posture, and the contact reliability of the two plane contact sections is ensured.

Description

Technical Field

[0001] The present invention relates to the field of contact components, and particularly to a plug blade, a socket sleeve and a socket. Background Art

[0002] The socket sleeve is an important component in a socket, mainly for the electric contact piece on the plug to insert, so as to realize the electrical connection of the device. For example, the Chinese utility model patent with the authorization announcement number CN213184673U discloses a socket sleeve, which includes a substrate and two symmetrically arranged U-shaped elastic arms located on the substrate. The two arm bodies of the U-shaped elastic arm are integrally connected by a straight plate section bent inward at the front end. An insertion gap for the electric contact piece of the adapted plug to extend into is formed between the two U-shaped elastic arms. The arm body of the U-shaped elastic arm in contact with the adapted electric contact piece has a plane contact section with a straight-line overhang, and the distance between the front ends of the two plane contact sections is greater than the distance between the rear ends of the two plane contact sections. Among them, due to the existence of the straight plate section, there are edges and corners on the U-shaped elastic arm. During insertion, the plane contact section of the U-shaped elastic arm will deflect outward around the edges and corners, and stress concentration is likely to occur at the edges and corners. At the same time, because the distance between the front ends of the two plane contact sections is greater than the distance between the rear ends of the two plane contact sections, during insertion, the deformation amount of the rear end of the plane contact section will be greater than that of the front end. When in the inserted state, the socket sleeve and the electric contact piece will generate heat. After long-term use, it is easy for the socket sleeve to undergo plastic deformation. At this time, it is difficult to ensure the elastic force of the plane contact section, and it is also difficult to ensure the reliable fit between the front end of the plane contact section and the rear end of the plane contact section and the electric contact piece. Summary of the Invention

[0003] The purpose of the present invention is to provide a plug blade to solve the problem that it is difficult to ensure the reliable fit between the front end and the rear end of the plane contact section and the electric contact piece after long-term use of the existing plug blade; the purpose of the present invention is also to provide a socket sleeve to solve the problem that it is difficult to ensure the reliable fit between the front end and the rear end of the plane contact section and the electric contact piece after long-term use of the existing socket sleeve; the purpose of the present invention is also to provide a socket to solve the problem that it is difficult to ensure the reliable fit between the front end and the rear end of the plane contact section and the electric contact piece after long-term use of the existing socket sleeve.

[0004] A plug blade of the present invention includes a root fixed plate body part and a U-shaped elastic arm integrally connected to one end of the root fixed plate body part. When the plug blade is used, it is arranged symmetrically in pairs. An insertion gap for the adapted electric contact piece to extend into is formed between the two U-shaped elastic arms of the plug blades arranged in pairs. The arm body of the U-shaped elastic arm in contact with the adapted electric contact piece has a plane contact section with a straight-line overhang. The plane contact section inclines towards the other arm body, so that the distance between the front ends of the plane contact sections of the two plug blades is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the electric contact piece of the adapted plug.

[0005] Further, the two arm bodies of the U-shaped elastic arm are integrally connected through a front-end arc section, and the arc section is tangent to both arm bodies.

[0006] Further, the arm body of the U-shaped elastic arm connected to the root fixing plate body part has a concave section that is concave towards the other arm body, and the lowest point of the concave section of the concave section is on the front side of the rear end of the plane contact section.

[0007] Further, an elastic support part is also provided on the root fixing plate body part and extends towards the plane contact section to elastically support it.

[0008] Further, the elastic support part abuts against the rear end of the plane contact section.

[0009] Further, the elastic support part is a cantilever elastic piece that extends inwards and is provided on the root fixing plate body part.

[0010] Further, in the inserted state, there is a gap between the end of the cantilever elastic piece and the arm body of the U-shaped elastic arm connected to the root fixing plate body part.

[0011] Further, the cantilever elastic piece is connected to the front end position of the root fixing plate body part.

[0012] Further, the cantilever elastic piece is integrally stamped on the root fixing plate body part.

[0013] Further, the cantilever elastic pieces are arranged in groups in the width direction of the root fixing plate body part.

[0014] Further, the length of the plane contact section is not less than half of the other arm body.

[0015] The present invention proposes a technical solution with more elements. The plane contact section of the U-shaped elastic arm of the insertion piece is inclined towards the other arm body, so that the distance between the front ends of the plane contact sections of the two insertion pieces is less than the distance between their rear ends. In this way, when the electric contact piece is inserted, the electric contact piece will apply an outward force to the front end of the U-shaped elastic arm to make the U-shaped elastic arm swing outwards relative to the root fixing plate body part. At this time, the amplitude of the outward swing of the front ends of the two plane contact sections is greater than the amplitude of the outward swing of the rear ends of the two plane contact sections, which can make the two plane contact sections present a parallel posture to insert with the electric contact piece, ensuring the contact area between the plane contact section and the electric contact piece and also ensuring the reliable contact between the plane contact section and the electric contact piece.

[0016] Another aspect of the present invention further provides a socket, which includes two independent inserts. The two inserts are arranged symmetrically in pairs. Each insert includes a root fixed plate body part and a U-shaped elastic arm integrally connected to one end of the root fixed plate body part. When in use, the inserts are arranged symmetrically in pairs, and an insertion gap for a mating power contact piece to extend into is formed between the two U-shaped elastic arms of the inserts arranged in pairs. The arm body of the U-shaped elastic arm in contact with the mating power contact piece has a linearly overhanging planar contact section. The planar contact section is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two inserts is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the power contact piece of the mating plug.

[0017] Further, the two arm bodies of the U-shaped elastic arm are integrally connected through a front-end arc section, and the arc section is tangent to both arm bodies.

[0018] Further, the arm body of the U-shaped elastic arm connected to the root fixed plate body part has an inward concave section concave towards the other arm body, and the lowest point of the inward concave of the inward concave section is on the front side of the rear end of the planar contact section.

[0019] Further, an elastic support part is also provided on the root fixed plate body part, which overhangs towards the planar contact section to elastically support it.

[0020] Further, the elastic support part abuts against the rear end of the planar contact section.

[0021] Further, the elastic support part is a cantilever spring piece that overhangs inwards and is provided on the root fixed plate body part.

[0022] Further, in the inserted state, there is a gap between the end of the cantilever spring piece and the arm body of the U-shaped elastic arm connected to the root fixed plate body part.

[0023] Further, the cantilever spring piece is connected to the front-end position of the root fixed plate body part.

[0024] Further, the cantilever spring piece is integrally stamped on the root fixed plate body part.

[0025] Further, the cantilever spring pieces are arranged in groups in the width direction of the root fixed plate body part.

[0026] Further, the length of the planar contact section is not less than half of the other arm body.

[0027] The present invention provides a technical solution for element transformation, in which the planar contact section of the U-shaped elastic arm of the insert is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two inserts is less than the distance between their rear ends. In this way, when the electrical contact piece is inserted, the electrical contact piece will apply an outward force to the front end of the U-shaped elastic arm to cause the U-shaped elastic arm to swing outward relative to the root fixed body part. At this time, the amplitude of the outward swing of the front ends of the two planar contact sections is greater than the amplitude of the outward swing of the rear ends of the two planar contact sections, enabling the two planar contact sections to present a parallel posture and be inserted with the electrical contact piece, ensuring the contact area between the planar contact section and the electrical contact piece, and also ensuring the reliable contact between the planar contact section and the electrical contact piece.

[0028] On the other hand, the present invention also provides another socket. The socket includes two pairs of inserts. Each insert includes a root fixed body part and a U-shaped elastic arm integrally connected to one end of the root fixed body part. When in use, the inserts are arranged symmetrically in pairs. An insertion gap for the corresponding electrical contact piece to extend into is formed between the two U-shaped elastic arms of the inserts arranged in pairs. The arm body of the U-shaped elastic arm that contacts the corresponding electrical contact piece has a linearly overhanging planar contact section. The planar contact section is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two inserts is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the electrical contact piece of the mating plug. The two inserts are symmetrically arranged and the root fixed body parts are integrally connected.

[0029] Further, the two arm bodies of the U-shaped elastic arm are integrally connected through a front-end arc section, and the arc section is tangent to both arm bodies.

[0030] Further, the arm body of the U-shaped elastic arm connected to the root fixed body part has an inwardly concave section that is concave towards the other arm body. The lowest point of the inward concavity of the inwardly concave section is located on the front side of the rear end of the planar contact section.

[0031] Further, an elastic support part is provided on the root fixed body part and extends towards the planar contact section to elastically support it.

[0032] Further, the elastic support part abuts against the rear end of the planar contact section.

[0033] Further, the elastic support part is a cantilever spring piece that extends inwards and is provided on the root fixed body part.

[0034] Further, in the inserted state, there is a gap between the end of the cantilever spring piece and the arm body of the U-shaped elastic arm connected to the root fixed body part.

[0035] Further, the cantilever spring piece is connected to the front end position of the root fixed body part.

[0036] Further, the cantilever spring piece is integrally stamped on the root fixed body part.

[0037] Further, the cantilever spring pieces are arranged in groups in the width direction of the root fixing piece body part.

[0038] Further, the length of the planar contact section is not less than half of the length of the other arm body.

[0039] The present invention provides a technical solution with improved elements. The planar contact section of the U-shaped elastic arm of the inserting piece is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two inserting pieces is less than the distance between their rear ends. In this way, when the electric contact piece is inserted, the electric contact piece will apply an outward acting force on the front end of the U-shaped elastic arm to cause the U-shaped elastic arm to swing outwards relative to the root fixing piece body part. At this time, the amplitude of the outward swing of the front ends of the two planar contact sections is greater than the amplitude of the outward swing of the rear ends of the two planar contact sections, so that the two planar contact sections can present a parallel posture to be inserted with the electric contact piece, ensuring the contact area between the planar contact section and the electric contact piece and also ensuring the reliable contact between the planar contact section and the electric contact piece.

[0040] On the other hand, the present invention also provides a socket, which includes a socket housing and an inserting sleeve fixedly installed in the socket housing. The inserting sleeve includes two independent inserting pieces, and the two inserting pieces are arranged symmetrically in pairs. Each inserting piece includes a root fixing piece body part and a U-shaped elastic arm integrally connected to one end of the root fixing piece body part. When in use, the inserting pieces are arranged symmetrically in pairs, and an inserting gap for the corresponding electric contact piece to extend into is formed between the two U-shaped elastic arms of the inserting pieces arranged in pairs. The arm body of the U-shaped elastic arm in contact with the corresponding electric contact piece has a linearly overhanging planar contact section, and the planar contact section is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two inserting pieces is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the electric contact piece of the matching plug.

[0041] Further, the two arm bodies of the U-shaped elastic arm are integrally connected through a front-end arc section, and the arc section is tangent to both arm bodies.

[0042] Further, the arm body of the U-shaped elastic arm connected to the root fixing piece body part has an inwardly concave section concave towards the other arm body, and the lowest point of the inward concavity of the inwardly concave section is located on the front side of the rear end of the planar contact section.

[0043] Further, an elastic support part is also provided on the root fixing piece body part, which overhangs towards the planar contact section to elastically support it.

[0044] Further, the elastic support part abuts against the rear end of the planar contact section.

[0045] Further, the elastic support part is a cantilever spring piece arranged on the root fixing piece body part and overhanging inwards.

[0046] Further, in the inserted state, there is a gap between the end of the cantilever spring piece and the arm body of the U-shaped spring arm that is connected to the root fixing piece body part.

[0047] Further, the cantilever spring piece is connected to the front end position of the root fixing piece body part.

[0048] Further, the cantilever spring piece is integrally stamped on the root fixing piece body part.

[0049] Further, the cantilever spring pieces are arranged in groups in the width direction of the root fixing piece body part.

[0050] Further, the length of the planar contact section is not less than half of the length of the other arm body.

[0051] The present invention proposes a technical solution with improved elements. The planar contact section of the U-shaped spring arm of the insertion piece is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two insertion pieces is less than the distance between their rear ends. In this way, when the electrical contact piece is inserted, the electrical contact piece will apply an outward force to the front end of the U-shaped spring arm to cause the U-shaped spring arm to swing outwards relative to the root fixing piece body part. At this time, the amplitude of the outward swing of the front ends of the two planar contact sections is greater than the amplitude of the outward swing of the rear ends of the two planar contact sections, which can make the two planar contact sections present a parallel posture when inserted with the electrical contact piece, ensuring the contact area between the planar contact section and the electrical contact piece and also ensuring the reliable contact between the planar contact section and the electrical contact piece.

[0052] Another aspect of the present invention also provides another socket. The socket includes a socket housing and an insert sleeve fixedly installed in the socket housing. The insertion piece includes a root fixing piece body part and a U-shaped spring arm integrally connected to one end of the root fixing piece body part. The insertion pieces are arranged in pairs symmetrically when in use. An insertion gap for the appropriate electrical contact piece to extend into is formed between the two U-shaped spring arms of the insertion pieces arranged in pairs. The arm body of the U-shaped spring arm that contacts the appropriate electrical contact piece has a linearly overhanging planar contact section. The planar contact section is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections of the two insertion pieces is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the electrical contact piece of the mating plug. The two insertion pieces are symmetrically arranged and the root fixing piece body parts are integrally connected.

[0053] Further, the two arm bodies of the U-shaped spring arm are integrally connected through a front end arc section, and the arc section is tangent to both arm bodies.

[0054] Further, the arm body of the U-shaped spring arm connected to the root fixing piece body part has an inward concave section that is concave towards the other arm body. The lowest point of the inward concave of the inward concave section is located on the front side of the rear end of the planar contact section.

[0055] Furthermore, an elastic support portion is provided on the root fixing sheet body portion and extends toward the planar contact section to elastically support it.

[0056] Furthermore, the elastic support portion abuts against the rear end of the planar contact section.

[0057] Furthermore, the elastic support portion is a cantilever spring piece that is provided on the root fixing sheet body portion and extends inward.

[0058] Furthermore, in the plugged state, there is a gap between the end of the cantilever spring piece and the arm body of the U-shaped spring arm that is connected to the root fixing sheet body portion.

[0059] Furthermore, the cantilever spring piece is connected to the front end position of the root fixing sheet body portion.

[0060] Furthermore, the cantilever spring piece is integrally stamped on the root fixing sheet body portion.

[0061] Furthermore, the cantilever spring pieces are arranged in groups in the width direction of the root fixing sheet body portion.

[0062] Furthermore, the length of the planar contact section is not less than half of the length of the other arm body.

[0063] The present invention proposes a technical solution with a more innovative element. The planar contact section of the U-shaped spring arm of the insertion piece is inclined toward the other arm body, so that the distance between the front ends of the planar contact sections of the two insertion pieces is less than the distance between their rear ends. In this way, when the electrical contact piece is inserted, the electrical contact piece will apply an outward force to the front end of the U-shaped spring arm to cause the U-shaped spring arm to swing outward relative to the root fixing sheet body portion. At this time, the amplitude of the outward swing of the front ends of the two planar contact sections is greater than the amplitude of the outward swing of the rear ends of the two planar contact sections, so that the two planar contact sections can present a parallel posture to be inserted with the electrical contact piece, ensuring the contact area between the planar contact section and the electrical contact piece and also ensuring the reliable contact between the planar contact section and the electrical contact piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 is a schematic structural diagram of an insertion sleeve of the present invention; Figure 2 is Figure 1 the left view of Figure 3 is Figure 1 the top view of Figure 4 is a schematic structural diagram of the electrical contact piece being inserted into the second embodiment of the insertion sleeve of the present invention; Figure 5 is a schematic structural diagram of a socket of the invention.

[0065] In the figure: 1, exterior decorative panel; 2, main panel; 3, protection door; 4, live wire socket; 5, neutral wire socket; 6, socket fixing frame; 7, neutral wire screw; 8, ground wire screw; 9, live wire screw; 10, ground wire socket; 11, socket; 110, U-shaped elastic arm; 111, root fixing piece body part; 112, arc section; 113, plane contact section; 114, cantilever elastic piece; 115, concave section; 116, connecting section; 12, electric contact piece. Specific implementation manner

[0066] The present invention proposes a technical solution with element change for the problems existing in the above technical solutions: the plane contact section of the U-shaped elastic arm of the insertion piece is inclined towards the other arm body, so that the distance between the front ends of the plane contact sections of the two insertion pieces is less than the distance between their rear ends. In this way, when the electric contact piece is inserted, the electric contact piece will apply an outward force to the front end of the U-shaped elastic arm to make the U-shaped elastic arm swing outward relative to the root fixing piece body part. At this time, the amplitude of the outward swing of the front ends of the two plane contact sections is greater than the amplitude of the outward swing of the rear ends of the two plane contact sections, so that the two plane contact sections can present a parallel posture to be inserted with the electric contact piece, ensuring the contact area between the plane contact section and the electric contact piece and also ensuring the reliable contact between the plane contact section and the electric contact piece.

[0067] According to the above technical concept, an insertion piece of the present invention includes Figure 1 , Figure 2 , Figure 3 the root fixing piece body part 111 shown in the figure and a U-shaped elastic arm 110 integrally connected to one end of the root fixing piece body part 111. When the insertion piece is used, it is arranged symmetrically in pairs. An insertion gap for the appropriate electric contact piece 12 to extend into is formed between the two U-shaped elastic arms 110 of the insertion pieces arranged in pairs. The arm body of the U-shaped elastic arm 110 in contact with the appropriate electric contact piece 12 has a linearly overhanging plane contact section 113. The plane contact section 113 is inclined towards the other arm body, so that the distance between the front ends of the plane contact sections 113 of the two insertion pieces is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the electric contact piece 12 of the matching plug. In this way, when the electric contact piece 12 is inserted, the electric contact piece 12 will apply an outward force to the front end of the U-shaped elastic arm 110 to make the U-shaped elastic arm 110 swing outward relative to the root fixing piece body part 111. At this time, the amplitude of the outward swing of the front ends of the two plane contact sections 113 is greater than the amplitude of the outward swing of the rear ends of the two plane contact sections 113, so that the two plane contact sections 113 can present a parallel posture to be inserted with the electric contact piece, ensuring the contact area between the plane contact section 113 and the electric contact piece 12 and also ensuring the reliable contact between the plane contact section 113 and the electric contact piece 12.

[0068] In this embodiment, the two arm bodies of the U-shaped spring arm 110 are integrally connected through the front-end arc segment 112, and the arc segment 112 is tangent to both arm bodies. In this way, stress concentration is not likely to occur at the connection between the arc segment 112 and the two arm bodies of the U-shaped spring arm 110, ensuring the mechanical properties of the U-shaped spring arm 110. In addition, in other embodiments, the two arm bodies of the U-shaped spring arm 110 may also be integrally connected through an arc segment 112 whose front end is not tangent to the two arm bodies of the U-shaped spring arm 110; of course, in another embodiment, the two arm bodies of the U-shaped spring arm 110 may also be integrally connected through a straight plate segment bent inward at the front end.

[0069] In this embodiment, the arm body of the U-shaped spring arm 110 connected to the root fixing plate body part 111 has an inner concave segment 115 that is concave toward the other arm body, and the lowest point of the inner concave of the inner concave segment 115 is located on the front side of the rear end of the plane contact segment 113. At this time, the front end of the U-shaped spring arm 110 will swing around its inner concave segment 115, and the rear end of the plane contact segment 113 will deflect along the tangent direction of the line connecting the rear end of the plane contact segment 113 and the lowest point of the inner concave. When the lowest point of the inner concave is located on the front side of the rear end of the plane contact segment 113, the rear end of the plane contact segment 113 has a tendency to deflect inward, ensuring the reliable fit between the rear end of the plane contact segment 113 and the electric contact piece 12, ensuring the contact area between the plane contact segment 113 and the electric contact piece 12, and also ensuring the reliable contact between the plane contact segment 113 and the electric contact piece 12. Of course, in other embodiments, as Figure 4 shown, the arm body of the U-shaped spring arm connected to the root fixing plate body part may also be a straight section extending forward, and when inserted, the U-shaped spring arm swings around the root fixing plate body part.

[0070] In this embodiment, an elastic support part is further provided on the root fixing plate body part 111 and extends toward the plane contact segment 113 to elastically support it. The elastic support part can provide an inward support force for the plane contact segment 113 to ensure the reliable contact between the plane contact segment 113 and the electric contact piece 12.

[0071] In this embodiment, the elastic support portion abuts against the rear end of the planar contact section 113. The distance between the front ends of the planar contact sections 113 of the two inserts is less than the distance between the rear ends. Thus, during insertion, the front ends of the planar contact sections 113 can reliably fit with the electrical contact piece 12, while the rear ends may face the problem of not fitting tightly with the electrical contact piece 12. Especially when the U-shaped elastic arm 110 only swings outward relative to the root fixing piece body portion 111, the rear end of the planar contact section 113 will deflect along the tangent direction of the line connecting the rear end of the planar contact section 113 and the root fixing piece body portion, that is, the rear end of the planar contact section 113 will have a tendency to deflect outward, which will affect the fitting of the rear end of the planar contact section 113 with the electrical contact piece 12. Therefore, in this embodiment, the elastic support portion abuts against the rear end of the planar contact section 113 to make the rear end of the planar contact section 113 abut tightly against the electrical contact piece 12, further ensuring the contact reliability between the insert and the electrical contact piece 12.

[0072] In this embodiment, the elastic support portion is a cantilever spring piece 114 that is inwardly overhanging and provided on the root fixing piece body portion 111. The end of the cantilever spring piece 114 is provided with a rounded corner section that bends outward, and the rounded corner section abuts against the planar contact section 113. During insertion, the rounded corner section will slide relative to the planar contact section 113. The structure of the cantilever spring piece 114 is simple and convenient for manufacturing. In addition, in other embodiments, the elastic support portion may also have the same structure as the elastic support portion of the socket insert disclosed in the patent with the authorization announcement number CN213184673U, that is, it is semicircular.

[0073] In this embodiment, in the inserted state, there is a gap between the end of the cantilever spring piece 114 and the arm body of the U-shaped elastic arm 110 that is connected to the root fixing piece body portion 111. Thus, even in extreme cases, the insertion of the electrical contact piece 12 and the insert 11 can be ensured. In addition, in other embodiments, in the inserted state, the end of the cantilever spring piece may also abut against the arm body of the U-shaped elastic arm that is connected to the root fixing piece body portion to provide stronger support.

[0074] In this embodiment, the cantilever spring piece 114 is connected to the front end position of the root fixing piece body portion 111. Thus, both the root fixing piece body portion at the rear end of the cantilever spring piece 114 can be used as the installation portion, which is convenient for the installation of the spring piece. In addition, in other embodiments, the cantilever spring piece may also be connected to the middle or rear end position of the root fixing piece body portion. At this time, the outer side surface of the root fixing piece body portion can be used as the installation surface for the installation of the insert.

[0075] In this embodiment, as Figure 2As shown, the cantilever spring piece 114 is integrally stamped on the root fixing piece body part 111. In this way, while saving materials, the propping function of the cantilever spring piece 114 is also ensured. In addition, in other embodiments, the cantilever spring piece can also be separately arranged from the root fixing piece body part and be installed on the root fixing piece body part through assembly.

[0076] In this embodiment, the cantilever spring pieces 114 are arranged in groups in the width direction of the root fixing piece body part 111. The reliability of its propping is further ensured. In addition, in other embodiments, the cantilever spring pieces can also be arranged individually, as long as the propping reliability of the rear end of the plane contact section is ensured.

[0077] In this embodiment, the length of the plane contact section 113 is not less than half of the length of the other arm body. In this way, the length of the plane contact section 113 is ensured as much as possible, so as to ensure the contact area between the inserting piece and the electric contact piece 12 and ensure the reliable contact between the inserting piece and the electric contact piece 12. In addition, in other embodiments, the length of the plane contact section can also be less than half of the length of the other arm body, as long as the reliable contact between the inserting piece and the electric contact piece is ensured.

[0078] On the other hand, the present invention also provides an inserting sleeve, which includes two independent inserting pieces. The two inserting pieces are symmetrically installed in pairs in the inserting sleeve fixing frame 6. Since the inserting pieces are the same as the embodiments of the above-mentioned inserting pieces, they will not be elaborated here.

[0079] On the other hand, the present invention also provides another inserting sleeve. The inserting sleeve 11 is as Figure 1 shown, and includes two inserting pieces in pairs. The two inserting pieces are symmetrically arranged. The root fixing piece body part 111 is integrally connected through a connecting section 116 perpendicular to the root fixing piece body part 111 itself. Since the inserting pieces are the same as the embodiments of the above-mentioned inserting pieces, they will not be elaborated here.

[0080] On the other hand, the present invention also provides a socket, which includes a socket housing and an inserting sleeve fixedly installed in the socket housing. The inserting sleeve includes two independent inserting pieces. The socket housing includes an inserting sleeve fixing frame 6, a main panel 2, and an exterior panel 1 clamped on the main panel 2. The inserting sleeve fixing frame 6 is provided with installation positions for installing the inserting pieces of the neutral inserting sleeve 5, the live inserting sleeve 4, and the ground inserting sleeve 10. The two inserting pieces are symmetrically installed in pairs in the installation positions. Since the inserting pieces are the same as the embodiments of the above-mentioned inserting pieces, they will not be elaborated here.

[0081] On the other hand, the present invention also provides another socket. The socket is as Figure 5As shown in the figure, it includes a socket housing, a socket insert 11 fixedly installed in the socket housing, and a protection door 3. The socket insert 11 includes a pair of two inserts, the two inserts are symmetrically arranged, and the root fixing plate part 111 is integrally connected through a connecting section 116 perpendicular to the root fixing plate part 111 itself. The connecting section 116 can be located on the side of the root fixing plate part; it can also be located at the rear end of the root fixing plate part. The socket housing includes a socket insert fixing frame 6, a main panel 2, and an exterior panel 1 clamped on the main panel 2. The socket insert fixing frame 6 is provided with installation positions for installing a neutral socket insert 5, a live socket insert 4, and a ground socket insert 10. The neutral socket insert 5, the live socket insert 4, and the ground socket insert 10 are respectively installed in the installation positions through a neutral wire screw 7, a live wire screw 9, and a ground wire screw 8.

[0082] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should be included in the protection scope of the present invention by the same token.

Claims

1. An insert piece, characterized in that: It includes a root fixing sheet body part (111) and a U-shaped elastic arm (110) integrally connected to one end of the root fixing sheet body part (111). When in use, the inserts are arranged symmetrically in pairs. An insertion gap for the mating power contact piece (12) to extend into is formed between the two U-shaped elastic arms (110) of the inserts arranged in pairs. The arm body of the U-shaped elastic arm (110) in contact with the mating power contact piece (12) has a linearly overhanging planar contact section (113). The planar contact section (113) is inclined towards the other arm body, so that the distance between the front ends of the planar contact sections (113) of the two inserts is less than the distance between their rear ends, and the distance between their rear ends is not greater than the thickness of the power contact piece (12) of the mating plug.

2. The insert piece according to claim 1, wherein: The two arm bodies of the U-shaped elastic arm (110) are integrally connected through a front-end arc section (112), and the arc section (112) is tangent to both arm bodies.

3. The insert piece according to claim 1, wherein: The arm body of the U-shaped elastic arm (110) connected to the root fixing sheet body part (111) has an inwardly concave section (115) that is concave towards the other arm body. The lowest point of the inward concavity of the inwardly concave section (115) is on the front side of the rear end of the planar contact section (113).

4. The insert piece according to any one of claims 1 - 3, characterized in that: An elastic support part is also provided on the root fixing sheet body part (111) and overhangs towards the planar contact section (113) to elastically support it.

5. The insert piece according to claim 4, characterized in that: The elastic support part abuts against the rear end of the planar contact section (113).

6. The insert piece according to claim 4, wherein: The elastic support part is a cantilever spring piece (114) that is inwardly overhanging and provided on the root fixing sheet body part (111).

7. The insert piece according to claim 6, characterized in that: In the inserted state, there is a gap between the end of the cantilever spring piece (114) and the arm body of the U-shaped elastic arm (110) connected to the root fixing sheet body part (111).

8. The insert piece according to claim 7, characterized in that: The cantilever spring piece (114) is connected to the front end position of the root fixing sheet body part (111).

9. The insert piece according to any one of claims 6-8, characterized in that: The cantilever spring piece (114) is integrally stamped on the root fixing sheet body part (111).

10. The insert piece according to any one of claims 6-8, characterized in that: The cantilever spring pieces (114) are arranged in groups in the width direction of the root fixing sheet body part (111).

11. The insert piece according to any one of claims 1 - 3, characterized in that: The length of the planar contact section (113) is not less than half of the other arm body.

12. A socket, characterized in that: It includes two independent inserts, and the two inserts are arranged symmetrically in pairs. The insert is the insert described in any one of claims 1-11.

13. A socket, characterized in that: It includes two inserts in a pair. The insert is the insert described in any one of claims 1-11. The two inserts are symmetrically arranged, and the root fixing sheet body parts (111) are integrally connected.

14. A socket, characterized in that: It includes a socket housing and an insert sleeve fixedly installed in the socket housing. The insert sleeve includes two independent inserts, and the two inserts are arranged symmetrically in pairs. The insert is the insert described in any one of claims 1-11.

15. A socket, characterized in that: It includes a socket housing and an insert sleeve (11) fixedly installed in the socket housing. The insert sleeve (11) includes two inserts in a pair. The insert is the insert described in any one of claims 1-11. The two inserts are symmetrically arranged, and the root fixing sheet body parts (111) are integrally connected.

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