Opening structure and circuit breaker
By introducing a gear set and trip unit cooperation structure into the circuit breaker, the problem of large tripping force during circuit breaker opening is solved, achieving lower tripping force requirements and longer service life.
Patent Information
- Application Number
- CN202420945803.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Existing circuit breakers require a large tripping force during the opening process, which affects their service life.
By introducing a gear set, trip unit, and trip device into the circuit breaker, one end of the trip unit is driven by the gear set, and the other end is driven by the trip device. The rotation of the gear set drives the trip unit to directly act on the trip device, thereby realizing the opening of the contact mechanism and reducing the dependence on the internal handle.
This reduces the tripping force when the circuit breaker trips, thus extending the service life of the circuit breaker.
Smart Images
Figure CN222320151U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a switch-off structure and a circuit breaker. Background Art
[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. When a power system has leakage, overload, short circuit or other faults, it can quickly cut off the faulty mechanism in the power system or cut off the entire power supply to prevent the fault from expanding and causing huge economic losses and casualties.
[0003] At present, the circuit breaker is equipped with a gear set, a tripping member, an inner handle, a connecting rod, and a contact mechanism composed of a tripping buckle and a locking buckle. During the opening process of the circuit breaker, the gear set drives the tripping member to rotate, the tripping member drives the inner handle to rotate, and the inner handle drives the contact mechanism to move through the connecting rod to separate from the static contact of the circuit breaker. However, in the existing opening method, if the contact mechanism is to be driven by the tripping member, it is necessary to at least drive the inner handle to rotate past its dead point position. The tripping force required in the opening process is large, and the opening is relatively laborious, which seriously affects the service life of the circuit breaker. Utility Model Content
[0004] The utility model aims to provide a tripping structure and a circuit breaker, which can reduce the tripping force required when the circuit breaker is tripped and increase the service life of the circuit breaker.
[0005] The embodiment of the utility model is achieved as follows:
[0006] In one aspect of the utility model, a tripping structure is provided, which includes a gear set, a tripping member, a release and a contact mechanism; the tripping member is connected to the housing of the circuit breaker, and one end of the tripping member is driven and matched with the gear set, and the other end is driven and matched with one end of the release, and the other end of the release is driven and matched with the contact mechanism; the gear set is driven to rotate to drive one end of the tripping member to rotate, and the other end of the tripping member can drive the release to operate, so that the contact mechanism is tripped. The tripping structure can reduce the tripping force required when the circuit breaker is tripped, and improve the service life of the circuit breaker.
[0007] Optionally, a protrusion is provided on the gear set, and the gear set is used to drive the release member to rotate through the protrusion.
[0008] Optionally, the opening structure further includes a reset spring, one end of which is fixed relative to the housing and the other end of which is connected to the release member; the reset spring stores energy when the gear set drives the release member to rotate.
[0009] Optionally, a fixing piece is protruding from the shell, and one end of the return spring away from the release piece is fixed to the fixing piece.
[0010] Optionally, the release comprises a first push rod, and the release member can drive the first push rod to move so as to open the contact mechanism.
[0011] Optionally, the releaser includes a first shell, a first moving iron core movably connected to the first shell, a first push rod inserted into the first moving iron core, a second push rod movably connected to the first shell and located at the end of the first moving iron core away from the release member, and a third push rod located at the end of the second push rod away from the first moving iron core; the release member is driven to rotate and can drive the first push rod to move, so that the first push rod pushes the third push rod through the second push rod to open the contact mechanism.
[0012] Optionally, a first through hole is provided in the first moving iron core for the first push rod to pass through, and the outer diameter of the second push rod is larger than the diameter of the first through hole and smaller than the outer diameter of the first moving iron core; and / or, a receiving groove is provided at one end of the second push rod close to the first push rod, and one end of the first push rod close to the second push rod extends into the receiving groove and has an interference fit with the second push rod.
[0013] Optionally, the release includes a second moving iron core, and the release member can drive the second moving iron core to move so as to open the contact mechanism.
[0014] Optionally, the releaser includes a second shell, a second moving iron core movably connected in the second shell, and a fourth push rod movably connected in the second shell and connected to the second moving iron core; the release member is driven to rotate to drive the second moving iron core to move, so that the second moving iron core pushes the fourth push rod to open the contact mechanism.
[0015] Optionally, the second moving iron core is plug-in connected to the fourth push rod and has an interference fit.
[0016] Another aspect of the present invention provides a circuit breaker, which includes the above-mentioned opening structure.
[0017] The beneficial effects of the utility model include:
[0018] The tripping structure provided by the present application includes a gear set, a release, a release and a contact mechanism; the release is connected to the housing of the circuit breaker, and one end of the release is driven and matched with the gear set, and the other end is driven and matched with one end of the release, and the other end of the release is driven and matched with the contact mechanism; the gear set is driven to rotate to drive one end of the release to rotate, and the other end of the release can drive the release to operate, so that the contact mechanism is tripped. The present application is achieved by rotatably connecting the release to the housing, and making one end of the release able to drive and match with the gear set, and the other end able to drive and match with the release, so that when the gear set is driven to rotate to drive one end of the release to rotate, the other end of the release can act on the release, so that the release is tripped to act on the contact mechanism, and then the contact mechanism is tripped. With this arrangement of the present application, one end of the tripping member acts on the gear set and the other end acts on the inner handle. When opening the circuit breaker, it is only necessary to drive the tripping member to rotate to realize the action of the release. Compared with the need to drive the tripping member to rotate to drive the inner handle to pass its dead point position, the present application can reduce the tripping force required when the circuit breaker is opened, thereby increasing the service life of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Figure 1 One of the structural schematic diagrams of the circuit breaker provided in the embodiment of the utility model;
[0021] Figure 2 A second structural schematic diagram of a circuit breaker provided in an embodiment of the utility model;
[0022] Figure 3 One of the structural schematic diagrams of the split-gate structure provided in the embodiment of the utility model;
[0023] Figure 4 The second structural diagram of the split switch structure provided by the embodiment of the utility model;
[0024] Figure 5 One of the structural schematic diagrams of the release member and the protrusion provided in the embodiment of the utility model;
[0025] Figure 6 The second structural schematic diagram of the release member and the protrusion provided in the embodiment of the utility model;
[0026] Figure 7One of the structural schematic diagrams of the release member and the return spring provided in the embodiment of the utility model;
[0027] Figure 8 The second structural schematic diagram of the release member and the return spring provided in the embodiment of the utility model;
[0028] Fig. 9 One of the structural schematic diagrams of the release member and the release device provided in the embodiment of the utility model;
[0029] Fig.10 The second structural schematic diagram of the release member and the releaser provided in the embodiment of the utility model.
[0030] Icons: 10-motor; 20-gear set; 21-first gear; 22-second gear; 23-third gear; 24-fourth gear; 25-bump; 30-release piece; 31-matching part; 40-release device; 41-first housing; 42-first moving iron core; 421-first through hole; 43-first push rod; 44-second push rod; 441-accommodating groove; 45-third push rod; 46-second housing; 47-second moving iron core; 48-fourth push rod; 50-contact mechanism; 60-reset spring; 70-housing; 71-fixing piece; 81-inner handle; 82-connecting rod; 90-button. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0034] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0035] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] Please refer to Figures 1 to 4 The present embodiment provides a tripping structure, which includes a gear set 20, a tripping member 30, a release 40 and a contact mechanism 50; the tripping member 30 is connected to the housing 70 of the circuit breaker, and one end of the tripping member 30 is drivingly matched with the gear set 20, and the other end is drivingly matched with one end of the release 40, and the other end of the release 40 is drivingly matched with the contact mechanism 50; the gear set 20 is driven to rotate to drive one end of the tripping member 30 to rotate, and the other end of the tripping member 30 can drive the release 40 to operate, so as to open the contact mechanism 50. The tripping structure can reduce the tripping force required when the circuit breaker is opened, and improve the service life of the circuit breaker.
[0038] The gear set 20 is driven and matched with the release member 30, and the gear set 20 is driven to rotate and can drive one end of the release member 30 to rotate the release member 30 on the housing 70. In this embodiment, the gear set 20 is in transmission connection with the motor 10, that is, the gear set 20 rotates under the driving action of the motor 10.
[0039] The release member 30 includes one end and the other end which are arranged opposite to each other. The middle position of the release member 30 is rotatably connected to the housing 70. When the release member 30 is driven to rotate, the two opposite ends thereof will also rotate.
[0040] In this embodiment, one end of the release member 30 is driven and cooperated with the gear set 20, and the other end is driven and cooperated with the release device 40. In this way, when the release member 30 is driven to rotate, the end of the release member 30 away from the gear set 20 can act on one end of the release device 40, so that the other end of the release device 40 acts on the contact mechanism 50, thereby opening the contact mechanism 50.
[0041] The release 40 is disposed between the release member 30 and the contact mechanism 50, and one end of the release 40 can be driven to cooperate with the release member 30, and the other end can be driven to cooperate with the contact mechanism 50. The release 40 can act on the contact mechanism 50 under the action of the release member 30, so that the contact mechanism 50 is opened.
[0042] In summary, the tripping structure provided in the present application includes a gear set 20, a tripping member 30, a release 40 and a contact mechanism 50; the tripping member 30 is connected to the housing 70 of the circuit breaker, and one end of the tripping member 30 is driven and matched with the gear set 20, and the other end is driven and matched with one end of the release 40, and the other end of the release 40 is driven and matched with the contact mechanism 50; the gear set 20 is driven to rotate to drive one end of the tripping member 30 to rotate, and the other end of the tripping member 30 can drive the release 40 to operate, so as to open the contact mechanism 50. The present application connects the release member 30 to the housing 70, and enables one end of the release member 30 to drive and cooperate with the gear set 20, and the other end to drive and cooperate with the release 40. In this way, when the gear set 20 is driven to rotate to drive one end of the release member 30 to rotate, the other end of the release member 30 can act on the release 40, so that the release 40 is tripped to act on the contact mechanism 50, and then the contact mechanism 50 is opened. Compared with one end of the release member 30 acting on the gear set 20 and the other end acting on the inner handle 81, this setting of the present application only needs to drive the release member 30 to rotate to realize the action of the release 40 when opening the circuit breaker. Compared with the need to drive the release member 30 to rotate to drive the inner handle 81 to cross its dead point position, the present application can reduce the tripping force required for the circuit breaker to open the circuit breaker, thereby increasing the service life of the circuit breaker.
[0043] Of course, the opening structure provided by the present application may also include an inner handle 81 drivingly matched with the gear set 20, a connecting rod 82 with two ends respectively connected to the inner handle 81 and the contact mechanism 50, and a button 90 connected to the inner handle 81. In this way, when opening and closing the switch manually, the inner handle 81 can be driven to rotate by the button 90, and the inner handle 81 drives the contact mechanism 50 to open or close the switch through the connecting rod 82; when closing the switch electrically, the gear set 20 can be driven to rotate by the motor 10, thereby driving the inner handle 81 to rotate through the gear set 20, and the inner handle 81 drives the contact mechanism 50 to close the switch through the connecting rod 82; when opening the switch electrically, the gear set 20 can be driven to rotate by the motor 10, and then the release member 30 can be driven to rotate through the gear set 20, and the release member 30 drives the releaser 40 to operate to open the switch of the contact mechanism 50.
[0044] In order to facilitate the gear set 20 to drive the release member 30 , optionally, the gear set 20 may also be provided with a protrusion 25 , and the gear set 20 is used to drive the release member 30 to rotate via the protrusion 25 .
[0045] It should be noted that, in this embodiment, the protrusion 25 is disposed on the last gear of the gear set 20, for example, Figure 2 and Figure 3 As shown, when the gear set 20 includes a first gear 21 , a second gear 22 , a third gear 23 and a fourth gear 24 that are meshed in sequence, the protrusion 25 can be disposed on the fourth gear 24 .
[0046] The protrusion 25 is used to act on one end of the release member 30 when the fourth gear 24 rotates, thereby driving the release member 30 to rotate. The present application does not limit the specific shape of the protrusion 25. Figure 5 and Figure 6 This is just an example, as long as the protrusion 25 can act on one end of the release member 30 to drive the release member 30 to rotate, and will not interfere with other movements.
[0047] Of course, the end of the release member 30 that acts on the protrusion 25 may also be correspondingly provided with a matching portion 31. In this way, when the protrusion 25 acts on one end of the release member 30 to drive the release member 30 to rotate, the protrusion 25 can specifically act on the matching portion 31 of the release member 30.
[0048] In order to enable the release member 30 to be reset as soon as possible after rotation to prepare for the next rotation, optionally, as Figure 7 and Figure 8 As shown, the opening structure may further include a reset spring 60, one end of which is fixed relative to the housing 70 and the other end is connected to the release member 30; the reset spring 60 stores energy when the gear set 20 drives the release member 30 to rotate.
[0049] In this way, when the release member 30 is driven to rotate, the reset spring 60 connected to the release member 30 can store energy; when the release member 30 is released from being driven, the release member 30 can be reset under the energy release action of the reset spring 60.
[0050] In order to facilitate fixing the end of the return spring 60 away from the release member 30, optionally, a fixing member 71 is convexly provided on the housing 70, and the end of the return spring 60 away from the release member 30 is fixed to the fixing member 71. For example, the fixing member 71 may be provided with a clamping groove, and the end of the return spring 60 away from the release member 30 may be clamped and limited in the clamping groove. Of course, in other embodiments, the end of the return spring 60 away from the release member 30 may also be directly mechanically connected to the fixing member 71.
[0051] In this embodiment, the above-mentioned release 40 is tripped under the action of the tripping member 30 and can act on the contact mechanism 50 to open the contact mechanism 50. The specific structure of the release 40 is not limited in this application.
[0052] For example, in a first possible implementation, Fig. 9 As shown, the release 40 includes a first push rod 43, and the release member 30 can drive the first push rod 43 to operate so as to open the contact mechanism 50.
[0053] like Fig. 9 As shown, optionally, the releaser 40 also includes a first housing 41, a first moving iron core 42 movably connected to the first housing 41, a first push rod 43 inserted into the first moving iron core 42, a second push rod 44 movably connected to the first housing 41 and located at the end of the first moving iron core 42 away from the release member 30, and a third push rod 45 located at the end of the second push rod 44 away from the first moving iron core 42; the release member 30 is driven to rotate and can drive the first push rod 43 to move, so that the first push rod 43 pushes the third push rod 45 through the second push rod 44, so that the contact mechanism 50 is opened.
[0054] The release member 30 rotates under the drive of the gear set 20, and can act on the first push rod 43 of the release device 40, so that the first push rod 43 moves along the Fig. 9 The third push rod 45 is pushed out by the second push rod 44 in the horizontal direction, so that the third push rod 45 can act on the contact mechanism 50 to open the contact mechanism 50.
[0055] Optionally, the first moving iron core 42 is provided with a first through hole 421 for the first push rod 43 to pass through, and the outer diameter of the second push rod 44 is larger than the diameter of the first through hole 421 and smaller than the outer diameter of the first moving iron core 42. In this way, when the switch is mechanically opened, the first moving iron core 42 can remain stationary, and the tripping member 30 drives the first push rod 43 to move, so that the first push rod 43 pushes the third push rod 45 to act on the contact mechanism 50 through the second push rod 44, so that the contact mechanism 50 is opened; and when the switch is instantaneously released, the movement of the first moving iron core 42 under the action of the magnetic signal can drive the movement of the second push rod 44, and can also open the contact mechanism 50.
[0056] It should be noted that a first coil may be sleeved on the outer periphery of the first housing 41 . The first coil generates a magnetic field when energized. The first moving iron core 42 can move under the action of the magnetic signal of the magnetic field to drive the second push rod 44 to move.
[0057] Optionally, a receiving groove 441 is provided at one end of the second push rod 44 close to the first push rod 43, and one end of the first push rod 43 close to the second push rod 44 extends into the receiving groove 441 and has an interference fit with the second push rod 44. In other words, the first push rod 43 is inserted into the receiving groove 441 of the second push rod 44 and has an interference fit with the second push rod 44.
[0058] For example, in the second feasible implementation, if Fig.10 As shown, the release 40 may include a second moving iron core 47 , and the release member 30 can drive the second moving iron core 47 to operate so as to open the contact mechanism 50 .
[0059] At this time, if Fig.10 As shown, optionally, the releaser 40 includes a second housing 46, a second moving iron core 47 movably connected in the second housing 46, and a fourth push rod 48 movably connected in the second housing 46 and connected to the second moving iron core 47; the release member 30 is driven to rotate and can drive the second moving iron core 47 to move, so that the second moving iron core 47 pushes the fourth push rod 48, so that the contact mechanism 50 is opened.
[0060] This method is different from the first embodiment in that, in the first embodiment, the tripping member 30 drives the first push rod 43 of the tripping device 40 so that the tripping device 40 acts on the contact mechanism 50; in this embodiment, the tripping member 30 drives the second moving iron core 47 of the tripping device 40 so that the tripping device 40 acts on the contact mechanism 50.
[0061] It should be noted that a second coil may be sleeved on the outer periphery of the second housing 46 , and the second coil generates a magnetic field when energized. The second moving iron core 47 can move under the action of the magnetic signal of the magnetic field to drive the fourth push rod 48 to move.
[0062] During mechanical opening, the tripping member 30 drives the second moving iron core 47 to move, so that the second moving iron core 47 pushes the fourth push rod 48 to act on the contact mechanism 50, so that the contact mechanism 50 is opened; and during instantaneous tripping, the second moving iron core 47 moves under the action of the magnetic signal to drive the fourth push rod 48 to move, and can also open the contact mechanism 50.
[0063] Optionally, the second moving iron core 47 and the fourth push rod 48 are plug-in connected and interference fit. Fig.10 As shown, a protruding column is provided at one end of the second moving iron core 47 close to the fourth push rod 48 , and a receiving groove is provided at one end of the fourth push rod 48 close to the second moving iron core 47 . The protruding column is inserted into the receiving groove and has an interference fit with the fourth push rod 48 .
[0064] Another aspect of the present invention provides a circuit breaker, which includes the above-mentioned opening structure. The specific structure and technical effects of the opening structure have been described in detail above, so this application will not repeat them here.
[0065] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
[0066] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.
Claims
1. A split-gate structure, characterized in that: The invention comprises a gear set (20), a release member (30), a release device (40) and a contact mechanism (50); the release member (30) is connected to a housing (70) of a circuit breaker, and one end of the release member (30) is drivingly matched with the gear set (20), and the other end is drivingly matched with one end of the release device (40); and the other end of the release device (40) is drivingly matched with the contact mechanism (50); The gear set (20) is driven to rotate so as to drive one end of the release member (30) to rotate, and the other end of the release member (30) can drive the release (40) to operate so as to open the contact mechanism (50).
2. The opening structure according to claim 1, characterized in that: The gear set (20) is provided with a protrusion (25), and the gear set (20) is used to drive the release member (30) to rotate via the protrusion (25).
3. The switch-off structure according to claim 1, characterized in that: The opening structure further comprises a reset spring (60), one end of which is fixed relative to the housing (70) and the other end of which is connected to the release member (30); when the gear set (20) drives the release member (30) to rotate, the reset spring (60) stores energy.
4. The switch-off structure according to claim 3, characterized in that: A fixing piece (71) is protruding from the housing (70), and one end of the return spring (60) away from the release piece (30) is fixed to the fixing piece (71).
5. The opening switch structure according to any one of claims 1 to 4, characterized in that: The release device (40) comprises a first push rod (43), and the release member (30) can drive the first push rod (43) to move so as to open the contact mechanism (50).
6. The opening structure according to claim 5, characterized in that: The release device (40) comprises a first housing (41), a first moving iron core (42) movably connected to the first housing (41), a first push rod (43) inserted into the first moving iron core (42), a second push rod (44) movably connected to the first housing (41) and located at an end of the first moving iron core (42) away from the release member (30), and a third push rod (45) located at an end of the second push rod (44) away from the first moving iron core (42); the release member (30) is driven to rotate to drive the first push rod (43) to move, so that the first push rod (43) pushes the third push rod (45) through the second push rod (44), so that the contact mechanism (50) is opened.
7. The opening structure according to claim 6, characterized in that: A first through hole (421) for the first push rod (43) to pass through is provided in the first moving iron core (42), and an outer diameter of the second push rod (44) is larger than a diameter of the first through hole (421) and smaller than an outer diameter of the first moving iron core (42); And / or, an end of the second push rod (44) close to the first push rod (43) is provided with a receiving groove (441), and an end of the first push rod (43) close to the second push rod (44) extends into the receiving groove (441) and is interference-fitted with the second push rod (44).
8. The switch-off structure according to any one of claims 1 to 4, characterized in that: The release device (40) comprises a second moving iron core (47), and the release member (30) can drive the second moving iron core (47) to operate so as to open the contact mechanism (50).
9. The opening structure according to claim 8, characterized in that: The release device (40) comprises a second housing (46), a second moving iron core (47) movably connected to the second housing (46), and a fourth push rod (48) movably connected to the second housing (46) and connected to the second moving iron core (47); the release member (30) is driven to rotate so as to drive the second moving iron core (47) to move, so that the second moving iron core (47) pushes the fourth push rod (48), so that the contact mechanism (50) is opened.
10. A circuit breaker, characterized in that: The invention comprises the opening switch structure as described in any one of claims 1 to 9.