Power safety socket with direct push micro switch

Abstract

The utility model discloses a power safety socket with a direct-push micro switch, comprising: a socket housing, a socket end cover with a plurality of sockets, a contact seat installed in the socket housing, a plurality of socket cores, a PCB circuit board and a plurality of adjustment components, each adjustment component comprising: an adjustment plate, a micro switch and a reset spring; the adjustment plate is horizontally placed below one or more of the socket cores, and the adjustment plate can move downward under the action of an external force; the micro switch is installed on the PCB circuit board to control the charging condition of the socket core; the reset spring is installed between the adjustment plate and the socket housing to reset the adjustment plate. The utility model can ensure that the socket core is charged only when and only when the electrode terminal of the plug is fully inserted into the socket, and has a higher safety factor, further ensuring the safety of the vehicle environment. At the same time, the utility model adopts a direct-push structure to press the micro switch, and the structure of the power safety socket is more compact.

Description

Technical Field

[0001] The utility model specifically relates to a power safety socket with a direct-push type micro switch. Background Art

[0002] With the development of automobiles, car-mounted power sockets can be used as inverter power sources, which is convenient for car owners and passengers to use low-power electrical devices in the car, and can also charge devices such as laptops. However, in existing sockets, when the socket core is powered, no matter whether the electrode terminals of the plug are fully inserted, as long as the electrode terminals are in contact with the socket core, they will be connected and conductive. At this time, part of the electrode terminals of the plug are still exposed to the outside, which poses a great safety risk, especially in a closed car environment. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a power safety socket with a direct-push micro switch.

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] The utility model discloses a power safety socket with a direct-push micro switch, comprising: a socket housing, a socket end cover with a plurality of sockets, a contact seat installed in the socket housing, a plurality of socket cores and a PCB circuit board, wherein the contact seat is used for carrying the socket core;

[0006] Also included are: a plurality of groups of adjustment components, each group of adjustment components including: an adjustment plate, a micro switch and a return spring;

[0007] The adjustment plate is horizontally placed below one or more groups of socket cores, and the adjustment plate can move downward under the action of external force;

[0008] The micro switch is installed on the PCB circuit board to control the charging status of the socket core;

[0009] The reset spring is installed between the adjustment plate and the socket housing to reset the adjustment plate;

[0010] When the electrode terminal of the plug is not fully inserted, the adjustment plate and the micro switch are not in contact, the micro switch does not operate, and the corresponding socket core is not charged;

[0011] When the electrode terminal of the plug is fully inserted, the electrode terminal pushes the adjustment plate downward until the lower surface of the adjustment plate contacts the micro switch, and the micro switch controls the corresponding socket core to be energized.

[0012] The utility model discloses a power safety socket with a direct-push micro switch, which improves the traditional power socket and adds an adjustment component. The micro switch is directly pushed by an adjustment plate to switch the charged state of the socket core.

[0013] The utility model can ensure that the socket core is energized only when the electrode terminal of the plug is fully inserted into the socket, effectively preventing arcing and ablation when the live wire contacts the electrode terminal of the plug, with a higher safety factor, further ensuring the safety of the vehicle environment. At the same time, the utility model adopts a direct-push structure to press the micro switch, and the structure of the power safety socket is more compact.

[0014] On the basis of the above technical solution, the following improvements can be made:

[0015] As a preferred solution, spring mounting seats are respectively installed on the adjustment plate and the socket housing, and the two ends of the return spring are respectively placed in the mounting grooves of the spring mounting seats.

[0016] The above preferred solution is adopted to ensure that the reset spring is installed stably without shaking, deflection or falling off.

[0017] As a preferred solution, an indicator light is installed on the PCB circuit board, and a light guide column is installed in the socket housing, and the light guide column is used to guide the light source of the indicator light to the surface of the socket housing.

[0018] The above preferred solution is adopted to facilitate personnel to intuitively feel the actual situation of the power safety socket according to the light guide column.

[0019] As a preferred solution, a limiting groove for installing the light guide column is provided on the socket housing.

[0020] By adopting the above preferred solution, the installation efficiency of the light guide column is improved.

[0021] As a preferred solution, a notch one is provided on the surface of the light guide column, and a buckle one matching with the notch one is provided on the socket housing, and the buckle one is snap-connected with the notch one.

[0022] By adopting the above preferred solution, the light guide column and the socket housing are snap-fitted by means of a slot snap-fit ​​structure, thereby ensuring that the light guide column is securely installed.

[0023] As a preferred solution, a second notch is provided on the PCB circuit board, and a second buckle matching the second notch is provided on the socket housing, and the second buckle is snap-connected with the second notch.

[0024] By adopting the above preferred solution, the PCB circuit board and the socket housing are locked together by a notch-locking structure to ensure that the PCB circuit board is firmly installed.

[0025] As a preferred solution, a protection seat is also installed in the socket housing, the protection seat is placed above the contact seat, and the protection seat is provided with holes for the electrode terminals of the plug to extend into, baffle plate 1 and baffle plate 2 are installed on the protection seat, baffle plate 1 and baffle plate 2 are provided with a plurality of push inclined surfaces, and the push inclined surfaces correspond to the holes on the protection seat one by one;

[0026] When the electrode terminal of the plug is inserted, the electrode terminal contacts the corresponding push slope of baffle plate 1 or baffle plate 2, pushing baffle plate 1 or baffle plate 2 to slide, exposing the hole on the protective seat, and the electrode terminal can further extend into the corresponding socket core.

[0027] By adopting the above preferred solution, baffle plate 1 and baffle plate 2 are used to protect several socket cores.

[0028] As a preferred solution, a convex shaft is provided on the protective seat, and bottom grooves are respectively provided at the bottom of baffle one and baffle two. The convex shaft of the protective seat is placed in the bottom grooves of baffle one and baffle two, and baffle one and baffle two can slide in two opposite directions along the length direction of the convex shaft.

[0029] By adopting the above preferred solution, the structure of the convex shaft and the bottom groove is utilized to guide the sliding of the baffle plate 1 and the baffle plate 2.

[0030] As a preferred solution, baffle plate 1 and baffle plate 2 respectively include: a baffle body, a left baffle wing and a right baffle wing, and the left baffle wing and the right baffle wing respectively have a pushing inclined surface;

[0031] The baffle body of baffle one is provided with a groove, the baffle body of baffle two is placed in the groove of baffle one, and the baffle body of baffle one and the baffle body of baffle two are elastically connected through a second reset spring.

[0032] By adopting the above preferred solution, the structures of baffle plate 1 and baffle plate 2 are reasonably designed, and sliding reset is achieved by using reset spring 2.

[0033] As a preferred solution, a plurality of stoppers are provided on the upper surface of the protection seat, and the stoppers are placed on the sliding paths of the baffle plate 1 and the baffle plate 2;

[0034] There is a sliding gap between the left blocking wing and the right blocking wing of the baffle plate 1 and the baffle plate 2 and the upper surface of the protection seat, and the height of the sliding gap is greater than the height of the block;

[0035] When no object is inserted into the socket, baffle plate 1 and baffle plate 2 are in a balanced state, and baffle plate 1 and baffle plate 2 are in contact with the protection seat only at the convex shaft and the bottom groove, and the rest of the parts are suspended in the air;

[0036] When the plug is inserted into the socket, baffle plate 1 or baffle plate 2 slides along the length direction of the convex shaft, so that the hole on the protective seat is exposed, and the electrode terminal can be further extended into the corresponding;

[0037] When a foreign object is inserted, the left baffle wing and the right baffle wing of the baffle plate 1 or baffle plate 2 are tilted with the convex shaft as the axis center, and the baffle plate 1 or baffle plate 2 is blocked by the block and cannot slide.

[0038] By adopting the above preferred solution, baffle 1, baffle 2 and the protective seat cooperate with each other to prevent foreign objects from being inserted into the socket through a single hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of a power safety socket provided in an embodiment of the utility model.

[0041] Figure 2 This is a schematic structural diagram of a socket housing provided in an embodiment of the utility model.

[0042] Figure 3 This is a schematic diagram of the structure inside the socket housing provided by an embodiment of the utility model.

[0043] Figure 4 A schematic diagram of the structure of the interior of the socket housing (hiding the PCB circuit board and the protective seat) provided in an embodiment of the utility model.

[0044] Figure 5 A schematic structural diagram of a protection seat provided in an embodiment of the utility model.

[0045] Figure 6 This is a schematic structural diagram of a baffle 1 provided in an embodiment of the utility model.

[0046] Figure 7 This is a schematic structural diagram of baffle 2 provided in an embodiment of the utility model.

[0047] Figure 8 A schematic structural diagram of the connection between baffle 1 and baffle 2 provided in an embodiment of the utility model.

[0048] Fig. 9 A rear view of the connection between baffle 1 and baffle 2 provided in an embodiment of the utility model.

[0049] Fig.10 This is a schematic diagram of baffle 1 and baffle 2 in a balanced state provided in an embodiment of the utility model.

[0050] Wherein: 1-socket housing, 11-limiting groove, 2-jack end cover, 3-contact seat, 4-socket core, 5-PCB circuit board, 51-indicator light, 52-light guide column, 61-adjustment plate, 62-micro switch, 63-reset spring 1, 64-spring mounting seat, 71-slot 1, 72-clip 1, 73-slot 2, 74-clip 2, 8-protection seat, 80-hole, 81-baffle 1, 811-groove, 82-baffle 2, 83-convex shaft, 84-bottom groove, 85-reset spring 2, 86-block, 87-sliding gap, 91-baffle body, 92-left baffle wing, 93-right baffle wing, 94-pushing inclined plane. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] In addition, the expression of “comprising” an element is an “open” expression, which simply means that a corresponding component exists, and should not be interpreted as excluding additional components.

[0054] In order to achieve the purpose of the utility model, some embodiments of the power safety socket with a direct-push micro switch, such as Figure 1-9 As shown, the power safety socket comprises: a socket housing 1, a socket end cover 2 with a plurality of sockets, a contact seat 3 installed in the socket housing 1, five sets of socket cores 4, a PCB circuit board 5 and a set of adjustment components. The socket housing 1 comprises: an upper shell and a base, and the socket end cover 2 is rotatably connected to the upper shell.

[0055] The contact seat 3 is used to carry the socket core 4. Five groups of socket cores 4 form a two-plug structure and a three-plug structure, and the middle socket core 4 of the three-plug structure is placed between the two socket cores 4 of the two-plug structure. The three socket cores 4 are arranged side by side to form a front plug area. The remaining two socket cores 4 form a rear plug area.

[0056] The adjustment component includes: an adjustment plate 61, a micro switch 62 and a return spring 63;

[0057] The adjustment plate 61 is horizontally placed below the socket core 4 in the front plug-in area, and the adjustment plate 61 can move downward under the action of external force;

[0058] The micro switch 62 is mounted on the PCB circuit board 5 and is used to control the charging status of the socket core 4;

[0059] The reset spring 1 63 is installed between the adjustment plate 61 and the socket housing 1 to reset the adjustment plate 61;

[0060] When the electrode terminal of the plug is not fully inserted, the adjustment plate 61 is not in contact with the micro switch 62, the micro switch 62 does not operate, and the corresponding socket core 4 is not charged;

[0061] When the electrode terminal of the plug is fully inserted, the electrode terminal pushes the adjustment plate 61 downward until the lower surface of the adjustment plate 61 contacts the micro switch 62, and the micro switch 62 controls the corresponding socket core 4 to be charged.

[0062] The utility model discloses a power safety socket with a direct-push micro switch, which improves the traditional power socket and adds an adjustment component. The micro switch 62 is directly pushed by an adjustment plate 61 to switch the charged state of the socket core 4.

[0063] The utility model can ensure that the socket core 4 is energized only when the electrode terminal of the plug is fully inserted into the socket, effectively preventing arcing and ablation when the live wire contacts the electrode terminal of the plug, with a higher safety factor, further ensuring the safety of the vehicle environment. At the same time, the utility model adopts a direct-push structure to press the micro switch 62, and the structure of the power safety socket is more compact.

[0064] In order to further optimize the implementation effect of the utility model, in some other embodiments, the other characteristic technologies are the same, the difference is that a spring mounting seat 64 is respectively installed on the adjustment plate 61 and the socket housing 1, and the two ends of the reset spring 63 are respectively placed in the mounting grooves of the spring mounting seat 64.

[0065] The above preferred solution is adopted to ensure that the reset spring 63 is installed stably without shaking, deflection or falling off.

[0066] Further, based on the above embodiment, an indicator light 51 is installed on the PCB circuit board 5 , and a light guide column 52 is installed in the socket housing 1 . The light guide column 52 is used to guide the light source of the indicator light 51 to the surface of the socket housing 1 .

[0067] The above preferred solution allows personnel to intuitively feel the actual situation of the power safety socket according to the light guide column 52. For example, when the indicator light 51 is used to indicate whether the power safety socket is energized, personnel can intuitively feel the energized situation of the power safety socket according to the light guide column 52.

[0068] Furthermore, on the basis of the above embodiment, a limiting groove 11 for mounting the light guide column 52 is provided on the socket housing 1 .

[0069] The above preferred solution is adopted to improve the installation efficiency of the light guide column 52. The light guide column 52 can be installed on the socket housing 1 in advance, and then the subsequent assembly is performed.

[0070] Further, on the basis of the above embodiment, a notch 71 is provided on the surface of the light guide column 52 , and a buckle 72 matching the notch 71 is provided on the socket housing 1 , and the buckle 72 is buckled with the notch 71 .

[0071] By adopting the above preferred solution, the light guide column 52 is snap-fitted to the socket housing 1 by means of a slot snap-fit ​​structure, thereby ensuring that the light guide column 52 is securely installed.

[0072] In order to further optimize the implementation effect of the utility model, in some other embodiments, the other characteristic technologies are the same, the difference is that a second slot 73 is provided on the PCB circuit board 5, and a second buckle 74 matching the second slot 73 is provided on the socket housing 1, and the second buckle 74 is snap-connected with the second slot 73.

[0073] By adopting the above preferred solution, the PCB circuit board 5 and the socket housing 1 are locked together by using a notch-locking structure to ensure that the PCB circuit board 5 is firmly installed.

[0074] In order to further optimize the implementation effect of the utility model, in some other embodiments, the other characteristic technologies are the same, except that a protection seat 8 is also installed in the socket housing 1, the protection seat 8 is placed above the contact seat 3, and the protection seat 8 is provided with 5 holes 80 for the electrode terminals of the plug to extend into, a baffle plate 1 81 and a baffle plate 2 82 are installed on the protection seat 8, and a plurality of push inclined surfaces 94 are provided on the baffle plate 1 81 and the baffle plate 2 82, and the push inclined surfaces 94 correspond one by one to the holes 80 on the protection seat 8;

[0075] When the electrode terminal of the plug is inserted, the electrode terminal contacts the corresponding push slope 94 of baffle 1 81 or baffle 2 82 , pushing baffle 1 81 or baffle 2 82 to slide, exposing the hole 80 on the protection seat 8 , and the electrode terminal can further extend into the corresponding socket core 4 .

[0076] By adopting the above preferred solution, the baffle plate 1 81 and the baffle plate 2 82 are used to protect the socket cores 4 .

[0077] Furthermore, on the basis of the above embodiment, a convex shaft 83 is provided on the protective seat 8, and bottom grooves 84 are respectively provided at the bottom of baffle 1 81 and baffle 2 82. The convex shaft 83 of the protective seat 8 is placed in the bottom grooves 84 of baffle 1 81 and baffle 2 82, and baffle 1 81 and baffle 2 82 can slide in two opposite directions along the length direction of the convex shaft 83.

[0078] By adopting the above preferred solution, the structure of the convex shaft 83 and the bottom groove 84 is utilized to guide the sliding of the baffle plate 1 81 and the baffle plate 2 82 .

[0079] Further, on the basis of the above embodiment, the baffle plate 1 81 and the baffle plate 2 82 respectively include: a baffle plate body 91, a left baffle wing 92 and a right baffle wing 93, and the left baffle wing 92 and the right baffle wing 93 respectively have a push inclined surface 94;

[0080] A groove 811 is provided on the baffle body 91 of baffle one 81 , and the baffle body 91 of baffle two 82 is placed in the groove 811 of baffle one 81 , and the baffle body 91 of baffle one 81 and the baffle body 91 of baffle two 82 are elastically connected via a return spring two 85 .

[0081] By adopting the above preferred solution, the structures of baffle plate 1 81 and baffle plate 2 82 are reasonably designed, and sliding reset is achieved by using reset spring 2 85 .

[0082] Further, on the basis of the above embodiment, four stoppers 86 are provided on the upper surface of the protection seat 8, and the four stoppers 86 are respectively placed on the sliding paths of the left stopper wing and the right stopper wing of the baffle plate 1 81 and the baffle plate 2 82;

[0083] There is a sliding gap 87 between the left and right blocking wings of the baffle plate 1 81 and the baffle plate 2 82 and the upper surface of the protection seat 8, and the height of the sliding gap 87 is greater than the height of the stopper 86;

[0084] When no object is inserted into the socket, the baffle 1 81 and the baffle 2 82 are in a balanced state, and the baffle 1 81 and the baffle 2 82 are in contact with the protection seat 8 only at the convex shaft 83 and the bottom groove 84, and the rest of the parts are suspended. Fig.10 As shown;

[0085] When the plug is inserted into the socket, the baffle 1 81 or baffle 2 82 slides along the length direction of the convex shaft 83, so that the hole 80 on the protection seat 8 is exposed, and the electrode terminal can be further extended into the corresponding;

[0086] When a foreign object is inserted, the left and right baffle wings of the baffle plate 1 81 or the baffle plate 2 82 tilt with the convex shaft 83 as the axis, and the baffle plate 1 81 or the baffle plate 2 82 is blocked by the stopper 86 and cannot slide.

[0087] By adopting the above preferred solution, baffle 1 81, baffle 2 82 and protective seat 8 cooperate with each other to prevent foreign objects from being inserted into the socket through a single hole.

[0088] The above multiple implementations can be implemented in parallel.

[0089] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0090] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0091] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A power safety socket with a direct-push micro switch, comprising: A socket housing, a socket end cover with a plurality of sockets, a contact seat installed in the socket housing, a plurality of groups of socket cores and a PCB circuit board, wherein the contact seat is used to carry the socket core; It is characterized in that it also includes: a plurality of groups of adjustment components, each group of the adjustment components includes: an adjustment plate, a micro switch and a return spring; The adjustment plate is horizontally placed below one or more groups of socket cores, and the adjustment plate can move downward under the action of external force; The micro switch is installed on the PCB circuit board and is used to control the charging status of the socket core; The reset spring 1 is installed between the adjustment plate and the socket housing, and is used to reset the adjustment plate; When the electrode terminal of the plug is not fully inserted, the adjustment plate is not in contact with the micro switch, the micro switch does not operate, and the corresponding socket core is not charged; When the electrode terminal of the plug is fully inserted, the electrode terminal pushes the adjustment plate downward until the lower surface of the adjustment plate contacts the micro switch, and the micro switch controls the corresponding socket core to be charged.

2. The power safety socket according to claim 1, characterized in that: A spring mounting seat is installed on the adjustment plate and the socket housing respectively, and two ends of the reset spring are respectively placed in the mounting grooves of the spring mounting seat.

3. The power safety socket according to claim 1, characterized in that: An indicator light is installed on the PCB circuit board, and a light guide column is installed in the socket housing. The light guide column is used to guide the light source of the indicator light to the surface of the socket housing.

4. The power safety socket according to claim 3, characterized in that: The socket housing is provided with a limiting groove for installing the light guide column.

5. The power safety socket according to claim 4, characterized in that: A notch one is arranged on the surface of the light guide column, and a buckle one matching with the notch one is arranged on the socket housing, and the buckle one is buckled with the notch one.

6. The power safety socket according to claim 1, characterized in that: A second notch is provided on the PCB circuit board, and a second buckle matching the second notch is provided on the socket housing, and the second buckle is snap-connected with the second notch.

7. The power safety socket according to claim 1, characterized in that: A protection seat is also installed in the socket housing, the protection seat is placed above the contact seat, and the protection seat is provided with holes for the electrode terminals of the plug to extend into, a baffle plate 1 and a baffle plate 2 are installed on the protection seat, a plurality of push inclined surfaces are provided on the baffle plate 1 and the baffle plate 2, and the push inclined surfaces correspond to the holes on the protection seat one by one; When the electrode terminal of the plug is inserted, the electrode terminal contacts the corresponding push slope of baffle 1 or baffle 2, pushing baffle 1 or baffle 2 to slide, exposing the hole on the protection seat, and the electrode terminal can further extend into the corresponding socket core.

8. The power safety socket according to claim 7, characterized in that: A convex shaft is provided on the protection seat, and bottom grooves are respectively provided at the bottom of baffle plate 1 and baffle plate 2. The convex shaft of the protection seat is placed in the bottom grooves of baffle plate 1 and baffle plate 2, and baffle plate 1 and baffle plate 2 can slide in two opposite directions along the length direction of the convex shaft.

9. The power safety socket according to claim 8, characterized in that: The baffle plate 1 and baffle plate 2 respectively comprise: a baffle body, a left baffle wing and a right baffle wing, wherein the left baffle wing and the right baffle wing respectively have a pushing inclined surface; The baffle body of the baffle one is provided with a groove, the baffle body of the baffle two is placed in the groove of the baffle one, and the baffle body of the baffle one is elastically connected with the baffle body of the baffle two via a second reset spring.

10. The power safety socket according to claim 9, characterized in that: A plurality of stoppers are provided on the upper surface of the protection seat, and the stoppers are placed on the sliding paths of the baffle plate 1 and the baffle plate 2; There is a sliding gap between the left blocking wing and the right blocking wing of the baffle plate 1 and the baffle plate 2 and the upper surface of the protection seat, and the height of the sliding gap is greater than the height of the block; When no object is inserted into the socket, the baffle plate 1 and the baffle plate 2 are in a balanced state, and the baffle plate 1 and the baffle plate 2 are in contact with the protection seat only at the convex shaft and the bottom groove, and the rest of the parts are suspended in the air; When the plug is inserted into the socket, the baffle plate 1 or baffle plate 2 slides along the length direction of the convex shaft, so that the hole on the protection seat is exposed, and the electrode terminal can be further extended into the corresponding hole; When a foreign object is inserted, the left blocking wing and the right blocking wing of the baffle plate 1 or baffle plate 2 are tilted with the convex shaft as the axis center, and the baffle plate 1 or baffle plate 2 is blocked by the block and cannot slide.

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