CN208188584U - Fixing device - Google Patents

Abstract

A kind of fixing device includes: primary heater, has the first glass tube；Secondary heater has the second glass tube；Plate-like first terminal component, and the one end of primary heater is fixed on the first terminal component；Plate-like Second terminal component, and the one end of secondary heater is fixed on the Second terminal component；Frame supports first terminal component and Second terminal component；And connecting member, second hole in the first hole and the one end loading for the second glass tube that are packed into the one end for the first glass tube, bonding agent is configured in the first hole, it is bonded in the first glass tube, and limit the movement of the first glass tube and connecting member, the limitation connecting member bonding agent mobile relative to the second glass tube is not configured in the second hole, the second glass tube is inserted in the second hole with the state there are gap.Using the fixing device, it is able to suppress by the generation of noise caused by connecting member and the friction of primary heater and secondary heater.

Description

Fixing device

Technical field

The utility model relates to a kind of fixing devices for having multiple heaters.

Background technique

In the past, in the fixing device that image forming apparatus has, it is known that a kind of structure for having multiple heaters.Example Such as a kind of fixing device known, each pin of the one end of two heaters is connect with common metal terminal component, and is respectively added The another side of hot device is inserted in quilt in the state of common connecting member made of ceramics (insulator) with the state there are gap Installation, each heater are linked side by side.

In addition, it is also known that a kind of fixing device is equipped with connecting member in two end sides of two heaters, and each heater exists Connecting member is fixed on by bonding agent respectively in two support holes possessed by connecting member.

The summary of utility model

But in the case where heater is inserted in connecting member with the state there are gap, in the operating of fixing device When, noise is generated due to colliding or rub relative to heater because of connecting member sometimes.In addition, being individually fixed in each heater In the case where connecting member, the generation of noise is suppressed, but is had when heater is assembled into fixing device and be difficult to assemble Problem.

Utility model content

In order to solve the problem, the fixing device of the utility model, has: primary heater, primary heater tool There is the first glass tube；Secondary heater, the secondary heater have the second glass tube；First terminal component, the first end sub-portion Part is plate-like, and the one end of the primary heater is fixed on the first terminal component；Second terminal component, the Second terminal Component is plate-like, and the one end of the secondary heater is fixed on the Second terminal component；Frame, frame bearing described the One terminal component and the Second terminal component；And connecting member, the connecting member have for first glass tube Second hole in the first hole and the one end loading for second glass tube that one end is packed into.It is configured in first hole There is bonding agent, which limits the shifting of first glass tube and the connecting member in first glass tube It is dynamic, it is not configured in second hole and limits the connecting member bonding agent mobile relative to second glass tube, institute The second glass tube is stated to be inserted in second hole with the state there are gap.

Detailed description of the invention

Fig. 1 is the outline for indicating to have the laser printer of fixing device involved in an embodiment of the utility model The figure of structure.

Fig. 2A is the perspective view for indicating primary heater, secondary heater, connecting member and terminal, and Fig. 2 B is Fig. 2A The enlarged drawing of right part.

Fig. 3 A is the cross-sectional view for indicating the positional relationship of primary heater, secondary heater, connecting member and heating roller, Fig. 3 B is the X-X cross-sectional view of Fig. 3 A.

Fig. 4 is to indicate that the figure of the state of fixing frame is fixed in the right part by primary heater and secondary heater.

Fig. 5 is the Y-Y cross-sectional view of Fig. 4.

Fig. 6 A is the positional relationship for indicating primary heater, secondary heater involved in variation and connecting member Cross-sectional view, Fig. 6 B are the Z-Z cross-sectional views of Fig. 6 A.

Specific embodiment

Then, the embodiments of the present invention is described in detail referring to appropriate attached drawing.In addition, in the following description In, firstly, the overall structure to the laser printer for having fixing device is simply illustrated, later, to the utility model Characteristic be described in detail.

In the following description, direction is said using to use user when laser printer as the direction of benchmark It is bright.That is, in Fig. 1, towards paper and using right side as " front side ", towards paper and using left side as " rear side ", and direction Paper and nearly front side be used as " left side ", towards paper using back side as " right side ".In addition, towards paper and by up and down direction As " up and down direction ".

As shown in Figure 1, laser printer 1 has sheet feed section 4 and image forming part 5 in main body frame 2, sheet feed section 4 is used In supply paper 3, image forming part 5 is used to form image by the paper 3 after paper supply.

Sheet feed section 4 has paper supply tray 6 and paper pressing plate 7, and paper supply tray 6 is dismantledly installed in main body frame 2 Bottom, paper pressing plate 7 is set in paper supply tray 6.In addition, sheet feed section 4 has the forward upper for being set to paper supply tray 6 Paper feed roller 8 and paper supply liner 9 and be set to relative to paper feed roller 8 paper 3 conveying direction downstream side paper dirt removal Roller 10,11.In addition, sheet feed section 4 has the registration roller 12 for being set to paper dirt removal 11 downstream side of roller.

Also, in thus configured sheet feed section 4, the paper 3 in paper supply tray 6 is by paper pressing plate 7 close to confession 8 side of paper bowl, and separated and sent out a sheet by a sheet using the paper feed roller 8 and paper supply liner 9, paper 3 is in main body frame 2 Front side passes through various rollers 10~12 in a manner of U-shaped turning, and towards rear side is transported to figure from the front side of main body frame 2 As forming portion 5.

Image forming part 5 has scanner section 16, handle box 17 and fixing device 100.

Top that scanner section 16 is set in main body frame 2 and have: lasing fluorescence portion (not shown)；It is driven in rotation Polygon prism 19；Lens 20,21；And reflecting mirror 22,23,24 etc..Also, in scanner section 16, click and sweep that laser beam passes through figure Path shown in line and high-velocity scanning are simultaneously irradiated on the surface of photosensitive drums 27 of handle box 17.

Handle box 17 is disposed in the lower section of scanner section 16 and detachable relative to main body frame 2.Handle box 17 is mainly by showing Shadow box 28 and drum unit 51 are constituted.

Delevoping cartridge 28 has developer roll 31, thickness margining tablet 32, supply roller 33 and developer hopper 34.Also, develop Developer in agent hopper 34 is fed into developer roll 31 by supply roller 33 after by blender (ellipsis) stirring, At this point, it is positively charged to rub between supply roller 33 and developer roll 31.The developer on developer roll 31 is fed into developer roll 31 rotation and enter between thickness margining tablet 32 and developer roll 31, be carried on developer roll 31 as certain thickness thin layer On.

Drum unit 51 has photosensitive drums 27, grid-control formula corona charging device 29 and transfer roll 30.Also, in the drum unit 51 Interior, the surface of photosensitive drums 27 using grid-control formula corona charging device 29 after equably being charged, by from scanner section 16 The high-velocity scanning of laser beam and expose.Electrostatic latent image based on view data is formed as a result,.

Then, by the rotation of developer roll 31, the developer being carried on developer roll 31 is connecing relatively with photosensitive drums 27 The electrostatic latent image being formed on the surface of photosensitive drums 27 is fed into when touching.Also, developer is by being selectively carried to It is visualizable on the surface of photosensitive drums 27, developer picture is formed by discharged-area development as a result,.Thereafter, paper 3 is in photosensitive drums It is conveyed between 27 and transfer roll 30, the developer picture for being carried on the surface of photosensitive drums 27 as a result, is transferred on paper 3.

After developer picture is heat-fixed by fixing device 100, transferred with developer picture paper 3 by conveying roller 43 are transported to paper discharge channel 44, and by exit roller 45 paper discharge to discharge tray 46.

Fixing device 100 mainly has heating roller 110, primary heater 120 and secondary heater 130, pressure roller 140, temperature detection part (the first temperature sensor) 150, fixing frame 160, heating roller 110 are extended with X in the axial direction It is rotated centered on rotation axis G, primary heater 120 and secondary heater 130 are configured at the inside of heating roller 110, pressurization Roller 140 is configured at the lower section of heating roller 110 and is pressed relative to heating roller 110.Heating roller 110 is between pressure roller 140 Engagement region (not shown) is formed to convey paper to defined conveying direction in the engagement region.The axis of engagement region End on the X of the direction amplitude broad compared with the central portion on the axis direction X of engagement region in the conveying direction.It is filled in the fixing It sets in 100, heating roller 110 is heated by primary heater 120 and secondary heater 130, thus in paper 3 after the direction of front side Side passes through between heating roller 110 and pressure roller 140 during (engagement region), and the developer picture being transferred on paper 3 is warm Fixing.

In the present embodiment, primary heater 120 and secondary heater 130 are to be generated heat by being powered respectively The halogen lamp that mode is constituted.Primary heater 120 and secondary heater 130 are arranged in the longitudinal direction.Specifically, Primary heater 120 is configured at the front side of secondary heater 130.First temperature sensor 150 is the outer peripheral surface to heating roller 110 Axis direction X on central portion the contactless thermistor that is detected of temperature.Fixing device 100 is also equipped with second Temperature sensor (not shown) and control device (not shown), axis direction of the second temperature sensor to the outer peripheral surface of heating roller The temperature of end on X is detected, and control device controls primary heater 120 and secondary heater 130.

As shown in Figure 2 A, primary heater 120 is the halogen lamp extended in left-right direction longlyer.Primary heater 120 With filament F, the first glass tube 121, as primary heater 120 one end an example the first right pin 122 and make For first left pin 123 of an example of the other end of primary heater 120.Primary heater 120 is formed as follows: will Filament F is configured in the first glass tube 121, is sealed the left and right directions both ends of the first glass tube 121 and will be wrapped halogen-containing lazy Property gas enclose the first glass tube 121 inside.

First glass tube 121 have the first cylindric glass tube main part 121A slenderly extended in left-right direction, The first right sealing of an example of the one end as the first glass tube 121 for sealing the right part of the first glass tube 121 121B, the first left sealing 121C for sealing the left part of the first glass tube 121.First right sealing 121B and first is left Sealing 121C is in rectangle in terms of left and right directions, and the size of up and down direction is greater than size in the front-back direction.The up and down direction Size is greater than the diameter of the first glass tube main part 121A, and size is straight less than the first glass tube main part 121A in the front-back direction Diameter.Here, up and down direction is and the orientation of primary heater 120 and secondary heater 130 and primary heater 120 The orthogonal direction of length direction, front-rear direction are the orientations of primary heater 120 and secondary heater 130.

First right pin 122 is electrically connected in the first right sealing 121B with filament F.First right pin 122 is along left and right Direction extends and protrudes from the face on the right side of the first right sealing 121B.The top end part of first right pin 122 is solid by welding etc. Due to the first terminal component 170 of plate.First left pin 123 is electrically connected in the first left sealing 121C with filament F.First Left pin 123 extends along left and right directions and protrudes from the face in the left side of the first left sealing 121C.The top of first left pin 123 End is fixed on the third terminal component 190 of plate by welding etc..

Secondary heater 130 is the halogen lamp extended in left-right direction longlyer.Secondary heater 130 has filament F, the Two glass tubes 131, as secondary heater 130 one end an example the second right pin 132 and as secondary heater Second left pin 133 of an example of 130 the other end.Secondary heater 130 configures in such a way: filament F is configured It is enclosed in the second glass tube 131, sealing the left and right directions both ends of the second glass tube 131 and halogen-containing inert gas will be wrapped The inside of second glass tube 131.

Second glass tube 131 have the second cylindric glass tube main part 131A slenderly extended in left-right direction, The second right sealing of an example of the one end as the second glass tube 131 for sealing the right part of the second glass tube 131 131B, the second left sealing 131C for sealing the left part of the second glass tube 131.Second right sealing 131B and second is left Sealing 131C is in rectangle in terms of left and right directions, and the size of up and down direction is greater than size in the front-back direction.The up and down direction Size is greater than the diameter of the second glass tube main part 131A, and size is straight less than the second glass tube main part 131A in the front-back direction Diameter.

Second right pin 132 is electrically connected in the second right sealing 131B with filament F.Second right pin 132 is along left and right Direction extends and protrudes from the face on the right side of the second right sealing 131B.The top end part of second right pin 132 is solid by welding etc. Due to the Second terminal component 180 of plate.Second left pin 133 is electrically connected in the second left sealing 131C with filament F.Second Left pin 133 extends along left and right directions and protrudes from the face in the left side of the second left sealing 131C.The top of second left pin 133 End is fixed on the third terminal component 190 of plate by welding etc..

In left and right directions on (length direction), the output of the central portion of primary heater 120 is higher than end.In left and right directions On, the output of the end of secondary heater 130 is higher than central portion.Also, the output of secondary heater 130 is greater than primary heater 120 output.

As shown in Figure 2A and 2B, first terminal component 170 is formed by one piece of sheet metal, comprising: just with up and down direction First base portion 171 of the plate of friendship, the first extension 172 extended upward from the first base portion 171, from the first extension 172 first connecting portions 173 extended towards rear.

First base portion 171 has the longer first long hole 171A of left and right directions.In the opposite of the lower surface of the first base portion 171 The top end part of the first right pin 122 is fixed on rear side of the first long hole 171A.First extension 172 is located at the first base portion 171 Right end front part and the first base portion 171 is linked with first connecting portion 173.First connecting portion 173 is connect with first The part of device C1 connection, the first connector C1 are connected to power supply.First connecting portion 173 is the longer rectangle of front-rear direction, and on The size in lower direction is less than the first extension 172.The top of first connecting portion 173 towards rear and with the first connector C1 card It closes.

Second terminal component 180 is formed by one piece of sheet metal, comprising: the second base portion of the plate orthogonal with up and down direction 181, the second extension 182 for extending downward from the second base portion 181, extended from the second extension 182 towards rear Two interconnecting pieces 183.

Second base portion 181 has the longer second long hole 181A of left and right directions.In the opposite of the lower surface of the second base portion 181 The top end part of the second right pin 132 is fixed on front side of the second long hole 181A.Second extension 182 is located at the second base portion 181 Right end front part and the second base portion 181 is linked with second connecting portion 183.Second connecting portion 183 is connect with second The part of device C2 connection, the second connector C2 are connected to power supply.Second connecting portion 183 is the longer rectangle of front-rear direction, and on The size in lower direction is less than the second extension 182.The top of second connecting portion 183 towards rear and with the second connector C2 card It closes.That is, the top of first connecting portion 173 and second connecting portion 183 is connected with towards the same direction and in a same direction Each connector C1, C2.

Third terminal component 190 is formed by one piece of sheet metal, comprising: the third base portion of the plate orthogonal with up and down direction 191, the third extension 192 that extends downward from third base portion 191, extended from third extension 192 towards rear Three interconnecting pieces 193.

Third base portion 191 has circular hole 191A.The top end part of first left pin 123 and the second left pin 133 is fixed In the part on the right side relative to circular hole 191A of third base portion 191.Third extension 192 is located at the left end of third base portion 191 Front part and third base portion 191 and third interconnecting piece 193 are linked.Third interconnecting piece 193 is connected with third connector C3 The part connect, third connector C3 are connected to power supply.Third interconnecting piece 193 is the longer rectangle of front-rear direction, and up and down direction Size be less than third extension 192.The top of third interconnecting piece 193 is towards rear and the top of third interconnecting piece 193 and the Three connector C3 engaging.That is, the top court on the top of third interconnecting piece 193 and first connecting portion 173 and second connecting portion 183 It is connected with connector to the same direction and in the same direction.

Fixing device 100 has the connecting member 200 for linking primary heater 120 and secondary heater 130.Connection Component 200 be by heat resistance insulating materials for example ceramics is formed and the size of left and right directions less than glass tube each sealing The component of 121B, 131B.The configuration of connecting member 200 is from the first glass tube main part 121A and the second glass tube main part 131A leaves the position of predetermined distance to the right.As shown in Figure 3A and 3B, connecting member 200 includes the first hole 201, Two holes 202, penetrated into from the first hole 201 connecting member 200 outer surface injection hole 203.

First hole 201 penetrates through in left-right direction and the rectangle bigger than size in the front-back direction in the size of up and down direction.The One hole 201 include the first upper surface 201U orthogonal with up and down direction, it is orthogonal with up and down direction and be located at the first upper surface 201U Downside the first lower surface 201D, as first face orthogonal with front-rear direction an example the first front surface 201F, with before Rear direction is orthogonal and is located at the first rear surface 201R of the rear side of the first front surface 201F.First front surface 201F is located at than first Position of the right sealing 121B further from the second hole 202.

The first right sealing 121B is incorporated in the first hole 201.The center of the left and right directions of first right sealing 121B Portion is packed into the first hole 201, and the right part of the first right sealing 121B is prominent from the first hole 201.First hole 201 has so that there are skies The state of gap is inserted into the size of the first right sealing 121B.In other words, compared with the first right sealing 121B, the first hole 201 Up and down direction and size is big in the front-back direction.

Second hole 202 penetrates through in left-right direction and the rectangle bigger than size in the front-back direction in the size of up and down direction.The Two holes 202 include the second upper surface 202U orthogonal with up and down direction, it is orthogonal with up and down direction and be located at the second upper surface 202U The second lower surface 202D of downside, the second front surface 202F orthogonal with front-rear direction, as the orthogonal and position with front-rear direction In the second rear surface 202R of an example in the second face of the rear side of the first front surface 201F.Second rear surface 202R is located at than second Position of the right sealing 131B further from the first hole 201.

The second right sealing 131B is incorporated in the second hole 202.The center of the left and right directions of second right sealing 131B Portion is packed into the second hole 202, and the right part of the second right sealing 131B is prominent from the second hole 202.Second hole 202 has so that there are skies The state of gap is inserted into the size of the second right sealing 131B.In other words, compared with the second right sealing 131B, the second hole 202 Up and down direction and size is big in the front-back direction.

Second hole 202 is greater than the size A1 in the first hole 201 in the size A2 in the second hole 202 in the longitudinal direction.That is, preceding In rear direction, the clearance amount (gap) of the second right sealing 131B is greater than the clearance amount of the first right sealing 121B.

Bonding agent S is configured in the first hole 201 of connecting member 200, bonding agent S is bonded in the first glass tube 121 The first right sealing 121B and limit the first right sealing 121B and connecting member 200 movement.On the other hand, in the second hole Bonding agent S of the limitation connecting member 200 relative to the movement of the second glass tube 131 is not configured in 202.

Bonding agent S is bonded in the first right sealing 121B and connecting member of the first glass tube 121 in the first hole 201 200.Bonding agent S is whole in the first hole 201 to fill the mode between the gap in the first right sealing 121B and the first hole 201 Extension ground configuration in body and injection hole 203.Bonding agent S is formed by the heat resistance insulating materials of such as cement etc..

In terms of left and right directions, connecting member 200 be configured at surround primary heater 120 and secondary heater 130 plus The inner central of hot-rolling 110.Specifically, connecting member 200 is encased in heating roller 110.In addition, in connecting member 200 The heart (center of gravity) is located at the rotation axis G of heating roller 110.It is greater than from rotation axis G to the distance B2 of the second rear surface 202R from rotation Distance B1 of the shaft axis G to the first front surface 201F.

Injection hole 203 is the hole for injecting bonding agent S, and from the first upper surface 201U to as with primary heater The top of an example in the orthogonal direction of 120 length direction extends.Injection hole 203 is open in the outer surface of connecting member 200.

As shown in Figure 4 and 5, fixing frame 160 includes bearing first terminal component 170 and Second terminal component 180 bearing surface 160A；From bearing surface 160A first boss 164 and second boss 165 outstanding downwards；From bearing surface 160A the first limiting unit 161 outstanding, the second limiting unit 162 and third limiting unit 163 downwards.In 164 shape of first boss The first hole 160B that the lower end surface 164A of Cheng Youcong first boss 164 extends upwards.It is formed in second boss 165 from The second hole 160C that the lower end surface 165A of two boss 165 extends upwards.

The first screw after the first hole 160B is screwed with the first long hole 171A for being encased in first terminal component 170 N1.The second screw N2 after the second hole 160C is screwed with the second long hole 181A for being encased in Second terminal component 180.

First limiting unit 161 is configured between first terminal component 170 and Second terminal component 180, and by first end Subassembly 170 is limited to not to be close to the degree for being less than predetermined distance at a distance between the two with Second terminal component 180.The Two limiting units 162 are configured at the side opposite with the first limiting unit 161 across first terminal component 170, thus limitation first Movement on the front-rear direction of terminal component 170.Third limiting unit 163 is configured at and first across Second terminal component 180 The opposite side of limiting unit 161, to limit the movement on the front-rear direction of Second terminal component 180.

Here, the distance L1 on from the front end of the first limiting unit 161 to the front-rear direction of the second limiting unit 162 subtracts first The resulting distance of size L2 (L1-L2) on the front-rear direction of terminal component 170 is less than from the rear end of the first limiting unit 161 to the It is resulting that distance L3 on the front-rear direction of three limiting units 163 subtracts the size L4 on the front-rear direction of Second terminal component 180 Distance (L3-L4).In other words, in the longitudinal direction, the clearance amount (L3-L4) of Second terminal component 180 is greater than first end sub-portion The clearance amount (L1-L2) of part 170.

The slave bearing surface 160A overhang outstanding of first boss 164 is greater than the thickness of first terminal component 170.Also, The lower end surface 164A of first boss 164 is contacted with the first screw N1.First terminal component 170 is as a result, with there are the states in gap It is inserted in the first screw N1 and is fixed between the bearing surface 160A of frame 160.The slave bearing surface 160A of second boss 165 is outstanding Overhang is greater than the thickness of Second terminal component 180.Also, the lower end surface 165A of second boss 165 is contacted with the second screw N2. Second terminal component 180 is inserted in the second screw N2 with the state there are gap and is fixed the bearing surface 160A of frame 160 as a result, Between.That is, in the up-down direction, first terminal component 170 and Second terminal component 180 are inserted in the state there are gap It is fixed between the bearing surface 160A and screw of frame 160.

In the fixing device 100 constituted as described above, according to first step~the 6th process sequence to by first Sequence when heater 120 and secondary heater 130 are assembled into fixing frame 160 is illustrated.At this point, the second step and The order of three processes may be reversed.

As first step, the right part of primary heater 120 is inserted into the first hole 201 of connecting member 200, and will The right part of secondary heater 130 is inserted into the second hole 202 of connecting member 200.

As the second step, by welding etc. by each pin 122 of primary heater 120 and secondary heater 130, 123,132,133 it is fixed to each terminal component 170,180,190.

As the third step, bonding agent S is injected into the first hole 201 from the injection hole 203 of connecting member 200, and is made Bonding agent S is dry, so that primary heater 120 and connecting member 200 is fixed.

As the fourth step, make first boss 164 by the first long hole 171A, and by the first screw N1 by first end Subassembly 170 is locking to fixing frame 160.

As the 5th process, make second boss 165 by the second long hole 181A, and by the second screw N2 by second end Subassembly 180 is locking to fixing frame 160.

As the 6th process, the first connector C1 is inserted into first terminal component 170, and the second connector C2 is inserted into To Second terminal component 180.

Effect/effect of the fixing device 100 constituted as described above is illustrated.

Connecting member 200 is fixed on fixing frame 160, thus connecting member 200 relative to primary heater 120 and There are in the case where gap, sometimes result in connecting member 200 and the first glass tube main part 121A collision for secondary heater 130 Or it rubs with the first right right sealing 131B of sealing 121B and second and generates noise.But in the present invention, The right sealing 121B of the first of one heater 120 is fixed in the first hole 201 of connecting member 200 by bonding agent S, therefore is being incited somebody to action Primary heater 120 and secondary heater 130 are assembled into after fixing frame 160, and connecting member 200 is relative to the first heating Device 120 does not move, thus connecting member 200 relative to be assembled into fixing frame 160 secondary heater without larger movement.Cause This, is able to suppress the production of noise caused by being rubbed by connecting member 200 and primary heater 120 and secondary heater 130 It is raw.

In addition, when secondary heater 130 is assembled into fixing frame 160 (the 5th process), due to the size of part Deviation etc. sometimes results in the position of the second long hole 181A of Second terminal component 180 and the second boss 165 of fixing frame 160 Set generation offset.At this point, have as the conventional art, it is difficult to by connecting member be affixed to primary heater and second plus Both hot devices and the case where assemble.But in the present invention, the second sealing 131B of secondary heater 130 is to stay There is the state in gap to be inserted in the second hole 202, therefore even if primary heater 120 is assembled into fixing frame 160 after, Also secondary heater 130 can be made mobile relative to primary heater 120, thus can easily by primary heater 120 with And secondary heater 130 is assembled into fixing frame 160.

In addition, the output (wattage) of secondary heater 130 is greater than the output (wattage) of primary heater 120, therefore It sometimes results in change in size produced by secondary heater 130 is expanded by line and is greater than primary heater 120.But even if In the case that two heaters 130 larger extend in the lateral direction compared with primary heater 120, due to secondary heater 130 are inserted in connecting member 200 with the state there are gap, therefore are able to suppress the left and right for being applied to each heater 120,130 Load on direction.

In addition, the output of the central portion of primary heater 120 is higher than the output of end, the end of secondary heater 130 Output is higher than the output of central portion, therefore sometimes results in primary heater 120 and secondary heater 130 because on left and right directions Change in size caused by line expansion is different.In this case, also due to secondary heater 130 is with there are the states in gap to insert Enter connecting member 200, therefore is able to suppress the load being applied on the left and right directions of each heater.

In addition, the output (wattage) of secondary heater 130 is greater than the output (wattage) of primary heater 120, also, The output of the central portion of primary heater 120 is higher than the output of end, and the output of the end of secondary heater 130 is higher than central portion Output, therefore the temperature of the end of secondary heater 130 has becomes high temperature compared with the temperature of the end of primary heater 120 Tendency.In the present embodiment, connecting member 200 is inserted in the state there are gap due to secondary heater 130, Heat can be made expeditiously to escape in the end for the secondary heater 130 for becoming high temperature.

In addition, connecting member 200 has the injection hole 203 for injecting bonding agent S, therefore it is readily injected into bonding agent S.Separately Outside, after assembling each heater 120,130, the opening and fixing frame 160 of injection hole 203 are opposite, therefore are able to suppress different Object is invaded to injection hole 203.

In addition, in the longitudinal direction, the size A2 in the second hole 202 is greater than the size A1 in the first hole 201, therefore can ensure In the front-back direction clearance amount of the secondary heater 130 relative to fixing frame 160.Also, since the rear side in the second hole 202 is big, Therefore primary heater 120 will not be got too close to secondary heater 130.

In addition, when primary heater 120 is assembled into fixing frame 160 (the fourth step), first terminal component 170 It is grown in the lateral direction for the first long hole 171A that the first screw N1 passes through, is thus easy assembling.In addition, after assembling, i.e., Make to be expanded by line and the size of the left and right directions of primary heater 120 is caused to change, can also absorb the variation of the size. In addition, first terminal component 170 is inserted in the first screw N1 and fixing frame by first boss 164 with the state there are gap Between the bearing surface 160A of frame 160, therefore it is easy assembling, and is able to suppress deformation, breakage after assembling.

In addition, when secondary heater 130 is assembled into fixing frame 160 (the 5th process), Second terminal component 180 It is grown in the lateral direction for the second long hole 181A that the second screw N2 passes through, is thus easy assembling.In addition, after assembling, i.e., Make to be expanded by line and the size of the left and right directions of secondary heater 130 is caused to send variation, can also absorb the variation of the size. In addition, Second terminal component 180 is inserted in the second screw N2 and fixing frame by second boss 165 with the state there are gap Between the bearing surface 160A of frame 160, therefore it is easy assembling, and is able to suppress deformation, breakage after assembling.

In addition, sometimes resulting in second end when secondary heater 130 is assembled into fixing frame 160 (the 5th process) Subassembly 180 is installed with being inclined by.But the clearance amount due to Second terminal component 180 relative to fixing frame 160 is greater than the The clearance amount of one terminal component 170, therefore when installing Second terminal component 180, even if Second terminal component 180 slightly inclines Tiltedly, also Second terminal component 180 interferingly can not be assembled by the first limiting unit 161 and third limiting unit 163.

In addition, fixing frame 160 has the first limiting unit 161, thereby, it is possible to by first terminal component 170 and second end The distance between subassembly 180 is maintained at predetermined distance or more.

In addition, it is configured with the second limiting unit 162 in fixing frame 160, and as a result, when the first connector C1 to be inserted into, energy Enough the paper of first terminal component 170 towards Fig. 4 is inhibited to rotate counterclockwise.In addition, being configured with the first limiting unit 161, exist as a result, When extracting the first connector C1, the paper for being able to suppress first terminal component 170 towards Fig. 4 is rotated clockwise, and by second When connector C2 is inserted into, the paper for being able to suppress Second terminal component 180 towards Fig. 4 rotates counterclockwise.In addition, being configured with third Limiting unit 163 is able to suppress paper up time of the Second terminal component 180 towards Fig. 4 as a result, when extracting the second connector C2 Needle rotation.

In addition, the first connecting portion 173 of first terminal component 170 and the second connecting portion 183 of Second terminal component 180 Towards the same direction, therefore it can be easily installed each connector C1, C2, in addition, each connector C1 after installation, C2 become Identical direction, therefore fixing device 100 and laser printer 1 can be made to minimize.

More than, the embodiments of the present invention is illustrated, but the utility model is not limited to the embodiment party Formula.For specific structure, can suitably be changed in the range of not departing from the purport of the utility model.In addition, right Structural element identical with the embodiment adds the same symbol and the description thereof will be omitted.

In said embodiment, bonding agent S is matched with filling the mode between the first hole 201 and the gap of the first glass tube 121 It sets, but not limited thereto.For example, bonding agent S can also be configured at a part in the first hole 201.

Such as shown in Fig. 6 A and Fig. 6 B, in the fixing device 300 involved in variation, the first glass tube 121 is limited It is bonded in the first glass tube 121 with the bonding agent S of the movement of connecting member 200, a part of bonding agent S is located at injection hole 203. Thereby, it is possible to engage to position the first glass tube 121 with injection hole by a part of bonding agent.At this point, bonding agent S can also To be bonded in the first hole 201, injection hole 203, can not also bond.

By the fixing device 300, bonding agent S can also limit the position of the first glass tube 121, thus be able to suppress by Connecting member 200 is relative to the mobile generated noise of primary heater 120 and secondary heater 130.In addition, by second When heater 130 is assembled into fixing frame 160 (the 5th process), the second glass tube 131 of secondary heater 130 is with there are gaps State be inserted in the second hole 202, therefore be easy assembling.In addition, the bonding agent S used can be completed with less amount, because This can save bonding agent.In addition, being easy to split when splitting the fixing device 300.

In said embodiment, it instantiates the end of secondary heater 130 and connection is inserted in the state there are gap The structure in the second hole 202 of component 200, but fixing device 100 is also possible to following form: the end of primary heater 120 with There are the first holes 201 that the state in gap is inserted in connecting member 200, limit the viscous of the movement of the end of secondary heater 130 Connect the second hole 202 that agent S is injected into connecting member 200.

In this mode, the difference of the control device detection temperature based on the first temperature sensor 150 and first object temperature And feedback control primary heater 120 is so that the detection temperature of the first temperature sensor close to first object temperature, and is based on The detection temperature of second temperature sensor with lower than first object temperature the second target temperature difference and feedback control second plus Hot device 130 so that the detection temperature of second temperature sensor close to the second target temperature.

It is biggish in the width that developer picture is fixed at axis direction X by above structure and each feedback control In the case where the paper of width (example: the width (210mm) of the paper of A4 size), primary heater 120 and secondary heater are lighted Both 130.At this point, the first object temperature for controlling primary heater 120 is higher than for controlling secondary heater 130 Second target temperature, thus primary heater 120 light duty ratio (per unit time light ratio) have higher than second plus The tendency for lighting duty ratio of hot device 130.As a result, the end phase of the end of primary heater 120 and secondary heater 130 Than having the tendency that becoming high temperature.In the present embodiment, the end of primary heater 120 is inserted in company with the state there are gap First hole 201 of knot part 200, therefore heat can be made expeditiously to escape from the end for the primary heater 120 for becoming high temperature.

It on the other hand, is lesser width (example: the width of postcard in the width that developer picture is fixed to axis direction X Spend (100mm)) paper in the case where, only light primary heater 120.As a result, the end of primary heater 120 and second The end of heater 130, which is compared, to be had the tendency that becoming high temperature.In the present embodiment, the end of primary heater 120 with there are The state in gap is inserted in the first hole 201 of connecting member 200, therefore heat can be made from the primary heater 120 for becoming high temperature End expeditiously escape.

In said embodiment, injection hole 203 is configured at the first upper surface 201U, however, not limited to this, can also match It is placed in the first front surface 201F, the first lower surface 201D can also be configured at.

In said embodiment, first connecting portion 173 and second connecting portion 183 are oriented rear, but can also be with For front.

In said embodiment, end of the pin as heater is instantiated, however, not limited to this, for example, it is also possible to It is the part of plate.

In said embodiment, fixing device has two heaters, but the number of heater is without being limited thereto.For example, The number of heater is also possible to three or more.

In said embodiment, halogen lamp is instantiated as primary heater and secondary heater, but first heats Device and secondary heater are not limited to this, such as be also possible to carbon heater etc..

In said embodiment, contactless thermistor is instantiated as the first temperature sensor 150, but first Temperature sensor is not limited to this, is also possible to the thermistor of contact.

In said embodiment, the thermistor of contact is instantiated as second temperature sensor, but second temperature Sensor is not limited to this, is also possible to contactless thermistor.

In addition, each element of each embodiment and each variation can be combined arbitrarily and be implemented.

Claims (11)

1. a kind of fixing device, includes:

Primary heater, the primary heater have the first glass tube；

Secondary heater, the secondary heater have the second glass tube；

First terminal component, the first terminal component is plate-like, and the one end of the primary heater is fixed on the first end Subassembly；

Second terminal component, the Second terminal component is plate-like, and the one end of the secondary heater is fixed on the second end Subassembly；

Frame, the frame support the first terminal component and the Second terminal component；And

Connecting member, the connecting member have for the first hole of the one end loading of first glass tube and for described second The second hole that the one end of glass tube is packed into,

Here, the fixing device is characterized in that,

Bonding agent is configured in first hole, which limits first glass in first glass tube The movement of glass pipe and the connecting member,

It is not configured in second hole and limits the connecting member bonding agent mobile relative to second glass tube,

Second glass tube is inserted in second hole with the state there are gap.

2. fixing device according to claim 1, which is characterized in that

The connecting member have injection hole, the injection hole from first hole to the length direction with the primary heater just The direction of friendship extends, and is open in the outer surface of the connecting member.

3. fixing device according to claim 2, which is characterized in that

The adhesive bonds are in first glass tube, and a part of the bonding agent is located at the injection hole.

4. fixing device according to claim 1, which is characterized in that

The bonding agent is bonded in first glass tube and the connecting member in first hole.

5. fixing device according to claim 1, which is characterized in that

The frame includes

First limiting unit, first limiting unit are configured between the first terminal component and the Second terminal component, so that The first terminal component can not be close to the degree for being less than predetermined distance at a distance between the two with the Second terminal component；

Second limiting unit, second limiting unit are configured at opposite with first limiting unit across the first terminal component Side, and limit the first terminal component and moved up in the direction that the primary heater and the secondary heater arrange It is dynamic；And

Third limiting unit, the third limiting unit are configured at opposite with first limiting unit across the Second terminal component Side, and limit the Second terminal component and moved up in the direction that the primary heater and the secondary heater arrange It is dynamic,

On the direction that the primary heater and the secondary heater arrange, from first limiting unit to described second The resulting distance of size that the distance of limiting unit subtracts the first terminal component is less than from first limiting unit to described the The distance of three limiting units subtracts the resulting distance of size of the Second terminal component.

6. fixing device according to claim 1, which is characterized in that

On the direction that the primary heater and the secondary heater arrange, the size in second hole is greater than described the The size in one hole.

7. fixing device according to claim 6, which is characterized in that

Have heating roller, which is configured in a manner of surrounding the primary heater and the secondary heater, and with It is rotated centered on rotation axis,

First hole has the first face, and first face is orthogonal with the direction that first hole and second hole arrange,

Second hole has the second face, and second face is orthogonal with the direction that first hole and second hole arrange,

First face is located further away from the position in second hole compared with the one end of first glass tube,

Second face is located further away from the position in first hole compared with the one end of second glass tube,

It is greater than from the rotation axis to the distance in second face from the rotation axis to the distance in first face.

8. fixing device according to claim 1, which is characterized in that

On the length direction of the primary heater, the output of the central portion of the primary heater is higher than the output of end,

On the length direction of the secondary heater, the output of the end of the secondary heater is higher than the output of central portion.

9. fixing device according to claim 1, which is characterized in that

The output of the secondary heater is greater than the output of the primary heater.

10. fixing device according to claim 1, which is characterized in that

The first terminal component has first connecting portion, which connect with the first connector,

The Second terminal component has second connecting portion, which connect with the second connector,

The first connecting portion and the second connecting portion are towards the same direction.

11. fixing device according to claim 10, which is characterized in that

The first connecting portion and the second connecting portion are arranged towards the primary heater and the secondary heater Direction.